As the settling distance is less than the chamber depth (1.0 m), the grit chamber can be expected to be effective in removing the particles with the given diameter.Using the Stoke's Law, the settling velocity is calculated as:
What is Stoke's Law ?Stoke's Law is a scientific principle that states that the terminal settling velocity of a small sphere in a viscous fluid is inversely proportional to the fluid's viscosity. It is named after Sir George Gabriel Stokes, who first derived this law in 1851. Stoke's Law is important in many different fields, such as particle sedimentation, particle separation, and fluid mechanics. The law is also used to predict the settling velocity of particles in a fluid, which is important for applications such as filtration.
V = (2 x 9.81 x (1.71 x 10-4)2 x (1.83 - 1)) / (18 x 10-6 x (1 - 0.01))
= 1.39 x 10-4 m/s
The settling distance is calculated as:
S = V x T
= 1.39 x 10-4 x 60
= 0.00834 m
As the settling distance is less than the chamber depth (1.0 m), the grit chamber can be expected to be effective in removing the particles with the given diameter.
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ou are conducting an experiment inside an elevator that can move in a vertical shaft. a load is hung vertically from the ceiling on a string, and is stationary with respect to you. the tension in the string is measured to be 10% less than the force due to gravity on the load. no other forces are acting on the load. which of the following statements about the elevator are correct?check all that apply.you are conducting an experiment inside an elevator that can move in a vertical shaft. a load is hung vertically from the ceiling on a string, and is stationary with respect to you. the tension in the string is measured to be 10% less than the force due to gravity on the load. no other forces are acting on the load. which of the following statements about the elevator are correct?check all that apply.the elevator is an inertial frame of reference.the elevator is not an inertial frame of reference.the elevator may be at rest for the duration of the entire experiment.the elevator may be moving at a constant velocity upward.the elevator may be moving at a constant velocity downward.the elevator must be accelerating. physics is beautifull
A frame of reference that is inertial is not the elevator.
The elevator must be accelerating.
What is Acceleration?
It is a vector quantity, which means that it has both magnitude and direction. Acceleration is defined as the change in velocity divided by the time it takes for that change to occur. Mathematically, acceleration can be expressed as:
a = (v_f - v_i) / t
where "a" is acceleration, "v_f" is the final velocity, "v_i" is the initial velocity, and "t" is the time taken for the change in velocity.
According to the problem statement, the tension in the string is measured to be 10% less than the force due to gravity on the load. This means that the net force on the load is not zero, and it is accelerating in the direction of the net force, which is downwards.
Since the load is stationary with respect to the observer inside the elevator, the elevator must also be accelerating downwards with an acceleration equal to that of the load. This implies that the elevator is not an inertial frame of reference, as an inertial frame of reference is a frame in which an object at rest remains at rest, or an object in motion moves with a constant velocity in a straight line, in the absence of any external forces.
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Explain the independent roles of the approach motivation and the avoidance motivation on producing feelings of contentment in a relationship.
Answer:
moving in the same direction
Explanation:
moving in the sam direction will give you the right idea
Please help will give 50 points and Brainly
Answer:
thanks for 50 points
Explanation:
!am sorry
Fill in the blank: in tableau, a diverging palette displays two value ranges. It uses a color to show the range where a data point is from and color intensity to show its ______.
In Tableau, a diverging palette displays two value ranges. It uses a color to show the range where a data point is from and color intensity to show its magnitude.
A diverging palette in Tableau shows two value ranges. A colour is used to indicate the range from which a data point comes, and a color's intensity to indicate the size of that range.For example, if we have a data set that shows the difference in temperatures between two cities, a diverging color palette can be used to represent the temperature difference. The color of each data point will indicate whether the temperature difference is positive or negative, while the intensity of the color will represent the magnitude of the difference. This can make it easier to visualize and understand the data, particularly when there are large differences in the values being compared.for such more question on range
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Not keeping accurate records of experimental observations is that a morality statement
While it may not be a moral issue per se, failing to maintain accurate records can be seen as a breach of scientific ethics, as it undermines the principles of transparency, reproducibility, and accountability that are essential to the scientific enterprise.
What is Molarity?
Molarity is a unit of concentration used in chemistry, which is defined as the number of moles of a solute per liter of solution. It is denoted by the symbol "M" and has units of moles per liter (mol/L).
Not keeping accurate records of experimental observations is not a morality statement, but it is a statement about scientific integrity and professionalism. Keeping accurate records is a fundamental aspect of the scientific process, and failing to do so can have serious consequences for the credibility of the research.
Inaccurate or incomplete records can lead to errors in data analysis, misunderstandings about the experimental design, and difficulties in reproducing the experiment. These issues can undermine the validity of the research and can make it difficult for other researchers to build on the findings.
Therefore, it is important for scientists to maintain accurate and detailed records of their experiments, including descriptions of the materials and methods used, observations made during the experiment, and any calculations or analyses performed. This information should be recorded in a systematic and organized manner, and should be easily accessible to other researchers in the field.
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Organ pipe A, with both ends open, has a fundamental frequency of 300 Hz. The third harmonic of organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are (a) pipe A and (b) pipe B?
(a) To find the length of pipe A, we can use the formula for the fundamental frequency of an open pipe:
f = v/2L
where f is the
frequency
, v is the speed of sound in air, and L is the length of the pipe.
We know that f = 300 Hz and that the pipe is open at both ends, so the first harmonic (or fundamental) frequency is given by:
f1 = v/2L
Substituting the given values:
300 Hz = v/2L
Solving for L:
L = v/2f
We can use the known value of the speed of sound in air at room temperature, which is approximately 343 m/s, to get:
L = 343 m/s / (2 x 300 Hz) = 0.572 m
Therefore, the length of pipe A is 0.572 m.
(b) To find the length of pipe B, we can use the formula for the frequency of a pipe with one end open:
f = (2n - 1)v/4L
where n is the harmonic number (i.e., 1 for the fundamental frequency, 2 for the second harmonic, 3 for the third harmonic, etc.).
We know that the third harmonic of pipe B has the same frequency as the second harmonic of pipe A, so:
(2 x 2 - 1)v/4LB = (2 x 1)v/2LA
5v/4LB = v/LA
Substituting the known value of LA from part (a), we get:
5v/4LB = v/(0.572 m
LB = 4/5 x 0.572 m = 0.458 m
Therefore, the length of pipe B is 0.458 m.
What is the formula for the frequency of an open pipe with one end closed, and how is it used to find the length of pipe B in this problem?The formula for the frequency of a pipe with one end open is f = (2n - 1)v/4L, where n is the harmonic number. To find the length of pipe B in this problem, we use the fact that the third harmonic of pipe B has the same frequency as the second harmonic of pipe A, and we set the two equations for these frequencies equal to each other.
What is the speed of sound in air at room temperature, and how is it used to find the length of pipe A in this problem?The speed of sound in air at room temperature is approximately 343 m/s. To find the length of pipe A in this problem, we use the formula for the fundamental frequency of an open pipe, which involves the speed of sound, and we solve for the length of the pipe.
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have you ever had to estimate something for which there wasn't an exact answer? what was it? what tools did you use to make your estimation? discuss
Yes, estimation of a population of plant species in a precondition area. The tool use to make estimation was a QUADRAT.
What is estimation ?Finding an estimate or approximation a number that may be used for a purpose despite the possibility of incomplete, ambiguous, or unstable input data is the process of estimation.
It is simple to count plants in a small area, and the distribution of those plants is noted on a map or scale diagram for the region.
A technique known as the quadrat sampling approach may be used to Assess the number of plants.
Thus, a QUADRAT, a square or rectangular frame (tool) composed of thick wire, is repeatedly tossed at random.
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WORTH 40 POINTS!!
Label the following topographic map. Click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (Increments for contour lines is 50 ft).
1.) River flow east
2.) Depression
3.) 2650 feet
4.) 3300 feet
5.) Steep area
1.) River flow east - The arrow pointing east in the lower right corner of the map indicates that the river flows east.
What is River flow?River flow is the movement of water through a river. It is the result of rainfall, melting snow and ice, and other sources of water such as groundwater. River flow is an important part of the water cycle and it is an essential component of many ecosystems. River flow affects the transport of sediment and nutrients, the formation of wetlands, and the formation of landforms such as floodplains, estuaries and other features.
2.) Depression - The area labelled "Depression" on the map is the area between two contour lines (2650 ft and 2800 ft).
3.) 2650 feet - The label "2650 ft" is placed on the contour line that is at 2650 feet.
4.) 3300 feet - The label "3300 ft" is placed on the contour line that is at 3300 feet.
5.) Steep area - The area labelled "Steep area" on the map is the area between two contour lines (3000 ft and 3250 ft). This area is steeper than the other areas on the map and would indicate a steep area.
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If the cushion hits the ground at 12m/s , what is the minimum distance that it must compress on impact to ensure that the egg is unscathed? note: the acceleration associated with stopping the egg is so great that you can neglect gravity while the cushion is slowing due to contact with the ground.
Therefore, the cushion must compress at least 0.74 millimeters to ensure that the egg is unscathed.
What is acceleration?Acceleration is the rate of change of velocity over time. It is a vector quantity, which means it has both magnitude and direction. It can be expressed mathematically as the change in velocity divided by the change in time, or a = (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time. Acceleration is measured in units of meters per second squared (m/s²) in the International System of Units (SI).
Here,
Assuming that the cushion provides a constant deceleration to stop the egg and that the time of contact between the cushion and the ground is negligible, we can use the formula for deceleration:
v² = u² - 2as
where v is the final velocity (0 m/s), u is the initial velocity (12 m/s), a is the deceleration, and s is the distance the cushion compresses.
Solving for s, we get:
s = (u² - v²) / 2a
Since the acceleration is the deceleration and is negative, we can rewrite the formula as:
s = (u² - v²) / 2(-a)
Substituting the given values, we get:
s = (12² - 0²) / 2(-a)
We don't know the value of a, but we do know that the egg must be unscathed, which means that the acceleration must be small enough to prevent it from breaking. Let's assume a maximum safe acceleration of 100 g (where g is the acceleration due to gravity), which is a common standard for crash testing.
100 g = 100 * 9.8 m/s² = 980 m/s²
So we want to find the smallest distance s that satisfies:
a >= -980 m/s²
s = (12² - 0²) / 2(-980) = 0.00074 meters, or about 0.74 millimeters.
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9. A .1-kg hockey puck traveling 7 m/s at 42 degrees collides with another hockey puck of the same mass that is traveling 5 m/s at 120 degrees. Afterwards, the first puck moves at 6 m/s at an angle of 130 degrees. What is the speed and direction of the second puck after the collision?
two objects colliding inelastically in one dimension. Kinetic friction is not conserved, but momentum is. (a) Two equal-mass objects initially move in the same direction.
What does physics mean when it refers to friction?
The force preventing sliding against one another of hard substrates, fluid sheets, and material components is known as friction. There are various kinds of friction: ... Friction between two surfaces causes kinetic energy from moving surfaces to be converted into infrared radiation
What does kinetic friction look like?
In the case of static friction or kinetic friction, the force of tension is always applied to counteract actual or potential movement between the contacting materials. A bent stone sliding all along ice, for instance, encounters a kinetic force that slows it down.
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A large scoreboard is suspended from the ceiling of a sports arena by 10 strong cables. Six of the cables make an angle of 8.0° with the vertical while the other four make an angle of 10.0°. If the tension in each cable is 1300.0 N, what is the scoreboard’s mass?
According to the problem the mass of the scoreboard is 1320.7 kg.
What is mass?Mass is the amount of matter in an object or substance. It is a measure of the amount of material in a body or an object and is usually expressed in kilograms, grams, or pounds. The mass of an object is usually determined by weighing it.
The sum of the 10 individual tensions must equal the mass of the scoreboard multiplied by the acceleration due to gravity, as follows:
T1 + T2 + T3 + T4 + T5 + T6 + T7 + T8 + T9 + T10 = m•g
Where:
T1-T10 = 1300.0 N (tension in each cable)
m = mass of the scoreboard
g = acceleration due to gravity (9.81 m/s2)
Substituting the values, we get:
1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N + 1300.0 N = m•(9.81 m/s2)
13000.0 N = m•(9.81 m/s2)
m = 13000.0 N / (9.81 m/s2)
m = 1320.7 kg
Therefore, the mass of the scoreboard is 1320.7 kg.
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After voltage was constant at 1.5 V, what did you observe about the motion of charges in the 3. external circuit? Observations (As voltage is increased, how do these quantities change?) Reasoning C V E Part 1 b-"V" and "A" constant- Battery Connected Keep the battery connected to the capacitor. With voltage at 1.5 V across capacitor and its area constant at its minimum value of 100 mm, slowly decrease the distance between the plates of capacitor to 2.0 mm. Observe the changes and provide reasoning in table below. was being decreased, what did you observe about the motion of charges in 4. As plate separation the external circuit? Reset to original configuration. Click the refresh button. Select all four options in top right comer (Plate Charges, Bar Graph, Electric Field, Current Direction). Connect Voltmeter across the capacitor and increase the battery voltage to 1.5 v After charging the capacitor to 1.5 V, disconnect the battery. Part 2 a "A" constant - Battery Disconnected With area of plates constant at 100 mm2, slowly decrease the distance between the plates of capacitor to 2.0 mm. Observe the changes and provide reasoning in table below. 8. Obtain an expression for magnitude of electric field E between the plates in terms of Q. A and . Show all work. USE EXTRA CALCULATIONS SHEET with calculations clearly identified if necessary to show all your work. Observations (As plate separation is decreased, how do these quantities change?)
1)Observations and Reasoning for Part 1b:
As for the motion of charges in the external circuit, it depends on the specific configuration of the circuit.
2)Observations and Reasoning for Part 2a:
The electric field between the plates of the capacitor also increases as the plate separation is decreased.
3)Expression for Electric Field E:
E = Q/(εA) = CV/(εA)
What is electric field?
A physics concept called the electric field is used to describe how an electric charge affects nearby charges. A modest positive test charge would feel that force per unit charge if it were placed at that location in space.As a vector quantity, the electric field has both magnitude and direction. The magnitude of the electric field is determined by the magnitude of the electric force at that location, and the direction is determined by the direction in which a positive test charge would travel in response to the electric force.According to the details, it appears that you ran an experiment to examine how the voltage across a capacitor and the plate separation affected the motion of charges and other physical parameters.
1. Observations and Justification for Part 1b:
The capacitance of the capacitor increases as the distance between the plates is reduced while maintaining a constant voltage of 1.5 V and a constant area of 100 mm2. The reason for this is that a parallel plate capacitor's capacitance is inversely proportional to the space between its plates.
Because the electric field is inversely proportional to the voltage across the capacitor, it also increases when the plate gap between the capacitor's plates decreases oppositely related to the space between the plates. As a result, the electric field between the plates gets stronger as the distance between the plates gets smaller while the voltage across the capacitor stays constant at 1.5 V.
2. Part 2a observations and reasoning:
The capacitor's capacitance increases for the same reason as in Part 1b as the space between its plates is reduced while maintaining its area at 100 mm2 and the battery is unplugged.
As the plate gap decreases, as previously mentioned, the electric field between the capacitor's plates also grows.
3. Expression for Electric Field E:
The following equation can be used to determine the size of the electric field E existing between a parallel plate capacitor's plate:
E = V/d
where d is the distance between the plates and V is the voltage across the capacitor.
The equation can be used to get the capacitance C of a parallel plate capacitor.
C = ε*A/d
where ε is the permittivity of the material between the plates, A is the area of each plate, and d is the distance between the plates.
By rearranging the above equation, we can express the electric field E in terms of Q, A, and C:
E = Q/(ε*A)
Since C = Q/V, we can also express the electric field E in terms of Q, A, and V:
E = Q/(εA) = CV/(εA)
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1. Ray Bender observes that light striking a sheet of material at 30 degree angle to the surface is bent to an angle of 36 degrees relative to the normal as it passes through the material. Through what material is the light passing?
Pyrex
Ruby
Crown glass
Water
2. While sitting at the pool, you see a coin at the bottom of the pool. The light reflects from the coin to the surface forming an angle of 20o with the normal,
1. If water has an index of refraction of 1.33, determine
45.4
14.9
62.9
27.1
Using the Snell's law, it was found that the medium through which the light is passing is the water.Therefore, the correct option is D.
What is Snell's law?Snell's Law states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the indices of refraction of the two media:
1.) n₁ sinθ₁ = n₂ sinθ₂
In the given problem:
For Water (index of refraction about 1.33), we get:
sinθ₁ = (1.00 sin36) / 1.33
sinθ₁ = 0.304
θ₁ = sin⁻¹(0.304)
θ₁ = 17.5 degrees
The only material for which the angle of incidence is close to 30 degrees is water. Therefore, the material through which the light is passing is most likely water.Therefore, the correct option is D.
2.) Using Snell's law, we can calculate the angle of incidence of the light ray as it enters the water:
n₁ sin θ₁ = n₂ sin θ₂
where n₁ is the refractive index of air (approximately 1), θ₁ is the angle of incidence (unknown), n₂ is the refractive index of water (1.33), and θ₂is the angle of refraction (20 degrees).
Plugging in the values and solving for θ₁:
1 x sin θ₁ = 1.33 x sin(20)
sin(theta1) = 1.33 x sin(20)
θ₁= sin⁻¹ (1.33 x sin (20))
θ₁ = 45.4 degrees
Therefore, the angle of incidence of the light ray in air is approximately 45.4 degrees. Hence, the correct option is A.
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The question is incomplete, but most probably the complete question is,
1. Ray Bender observes that light striking a sheet of material at 30 degree angle to the surface is bent to an angle of 36 degrees relative to the normal as it passes through the material. Through what material is the light passing?
A. Pyrex
B. Ruby
C. Crown glass
D. Water
2. While sitting at the pool, you see a coin at the bottom of the pool. The light reflects from the coin to the surface forming an angle of 20o with the normal,
1. If water has an index of refraction of 1.33, determine
A. 45.4
B. 14.9
C. 62.9
D. 27.1
A swimming pool has a width of 12 ft and a side profile as shown in w = 62.4 lb/ft3.
Part A Determine the resultant force the pressure of the water exerts on the wall AB
Part B Determine the resultant force the pressure of the water exerts on the wall DC .
Part C Determine the resultant force the pressure of the water exerts on the bottom BC .
A. The resultant force the pressure of the water exerts on the wall AB is equal to the force generated by the water pressure times the area of wall AB, which is equal to 12 ft x 62.4 lb/ft3 = 748.8 lb.
B. The resultant force the pressure of the water exerts on the wall DC is equal to the force generated by the water pressure times the area of wall DC, which is equal to 12 ft x 62.4 lb/ft3 = 748.8 lb.
C. The resultant force the pressure of the water exerts on the bottom BC is equal to the force generated by the water pressure times the area of the bottom BC, which is equal to 12 ft x 62.4 lb/ft3 = 748.8 lb.
Force is an interaction between two objects that results in a change of motion, shape, or energy of one or both objects. Force can cause objects to accelerate, decelerate, or change direction. A force is a push or a pull that acts upon an object as a result of its interaction with another object.
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A horizontal pipe of diameter 0.842 m has a smooth constriction to a section of diameter 0.5052 m . The density of oil flowing in the pipe is 821 kg/m3. If the pressure in the pipe is 7370 N/m2 and in the constricted section is 5527.5 N/m2, what is the rate at which oil is flowing?
A piece of a horizontal pipe with a diameter of 0.5052 m smoothly constricts from its diameter of 0.842 m. oil's viscosity as it flows through the pipe.
How does density work?How much "stuff" is contained in a specific quantity of space is determined by its density. For instance, a stone of the harder, light element gold Au will be heavier than a slab of the heavy element lead Pb. Styrofoam blocks are less dense than bricks. Mass per given volume serves as its definition.
Describe oil?Petroleum was created from the remains of extinct marine animals like plants, algae, and bacteria, just like coal and natural gas.
Oil is a thick, smooth fluid that is utilized as fuel and to move machine parts.
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Calculate the force of gravity on the 0.70- kg mass if it were 1.9×10^7 m above Earth's surface (that is, if it were four Earth radii from Earth's center).
Answer:
This answer his answers is quite long but here's your answer
Explanation:
The force of gravity on an object depends on two factors: the mass of the object and the distance between the object and the center of the Earth. The formula to calculate the force of gravity is:
F = G * (m1 * m2) / r^2
where F is the force of gravity, G is the gravitational constant (6.67 x 10^-11 N m^2/kg^2), m1 is the mass of the first object (in this case, the mass of the Earth), m2 is the mass of the second object (0.70 kg), and r is the distance between the centers of the two objects (in this case, the distance between the center of the Earth and the 0.70 kg mass, which is 4 times the radius of the Earth, or 4 * 6,371 km = 25,484 km).
First, we need to convert the distance from meters to kilometers:
1.9 x 10^7 m = 19 x 10^6 m = 19,000 km
So, the distance between the center of the Earth and the 0.70 kg mass is 25,484 km - 19,000 km = 6,484 km.
Now we can plug in the values into the formula:
F = G * (m1 * m2) / r^2
F = (6.67 x 10^-11 N m^2/kg^2) * (5.97 x 10^24 kg * 0.70 kg) / (6,484 km * 1000 m/km)^2
F = 2.17 x 10^-1 N
Therefore, the force of gravity on the 0.70 kg mass if it were 1.9 x 10^7 m above Earth's surface would be approximately 0.217 N.
You are driving along the road at 30 m/s, when you notice a deer in the road 40m in front of you. You immediately slam on the breaks and experience acceleration of -10 m/s.
a) Where would you come to a stop if the deer were not in your way?
b) How fast are you going when you reach the deer’s position?
c) how long does it take you to get there?
Luckily this is one smart deer. The deer runs to the side and needs to move a minimum of 1.2 meters to avoid being hit. What acceleration of the deer is necessary to just avoid collision with your car?
a) The deer were not in your way, you would come to a stop after traveling 45 meters.
b) You are going 10 m/s (or approximately 36 km/h) when you reach the deer's position.
c) It takes you 2 seconds to get to the deer's position.
d) The acceleration will be -0.6m/s
How The answer was obtaineda) To calculate where you would come to a stop if the deer were not in your way, we can use the following kinematic equation:
v^2 = u^2 + 2as
0^2 = 30^2 + 2(-10)s
0 = 900 - 20s
20s = 900
s = 45
Therefore, if the deer were not in your way, you would come to a stop after traveling 45 meters.
b) To calculate how fast you are going when you reach the deer's position, we can use the same kinematic equation as in part a, but this time we want to solve for the final velocity (v):
v^2 = u^2 + 2as
v^2 = 30^2 + 2(-10)(40)
v^2 = 900 - 800
v^2 = 100
v = 10 m/s
Therefore, you are going 10 m/s (or approximately 36 km/h) when you reach the deer's position.
c) To calculate how long it takes you to get to the deer's position, we can use another kinematic equation:
s = ut + (1/2)at^2
40 = 30t + (1/2)(-10)t^2
20t^2 - 30t + 40 = 0
Using the quadratic formula, we get:
t = [30 ± sqrt(30^2 - 4(20)(40))] / (2(20))
t = [30 ± sqrt(100)] / 40
t = 1 or 2
We take the positive root, t = 2, because we are interested in the time it takes you to get to the deer's position after you start braking. Therefore, it takes you 2 seconds to get to the deer's position.
d) To calculate the acceleration of the deer necessary to just avoid collision with your car, we can use the following kinematic equation:
s = ut + (1/2)at^2
1.2 = ut + (1/2)at^2
We know that the initial velocity of the deer is likely greater than zero, since it is not stationary in the road, so we can't simply use u = 0. However, we can estimate u based on the time it takes for the deer to move 1.2 meters out of the way. If we assume that the deer moves at a constant acceleration, then the final velocity of the deer when it has moved 1.2 meters is:
v = u + at
We know that v = 0 (since the deer comes to a stop after moving 1.2 meters), and we know t = 2 (since this is the time it takes for the car to reach the deer's original position). Therefore:
0 = u + a(2)
u = -2a
Substituting this into the previous equation we have:
s = ut+(1/2)at^2
1.2 = -2a*2 +(1/2)a * 2^2
= -0.6m/s
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A6 kg block moves with a constant speed 5 m/s on a horizontal frictionless surface and collides elastically with an identical block initially at rest. The second block collides and sticks to the last 6 kg block which was initially at rest.
What is the speed of the second 6 kg block after the first collision? What is the speed of the third 6 kg block after the second collision?
For the first 6 kg block, the speed after the collision will be 2.5 m/s. For the second 6 kg block, the speed after the collision will be zero since it sticks to the first 6 kg block.
What is Speed?Speed is a measure of how quickly an object moves or how quickly a task is performed. It is usually measured in units of distance per unit of time, such as metres per second, miles per hour, or kilometres per hour. Speed is an important concept in physics and is used to describe motion of all kinds, from elementary particles to everyday objects such as cars, planes, and rockets.
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Vector E is 0.111m long in a 90 degree direction. Vector F if 0.234m long in 300 degree direction. Find the magnitude of their vector sum
The magnitude of their vector sum is 0.149 m.
What is magnitude?
Magnitude is a measure of the size or intensity of a physical quantity. It can refer to the size of an earthquake, the brightness of a star, the intensity of a hurricane, or any other physical quantity that can be measured in size or intensity.
Ex = Ecose (0.111) cos90° = 0 =
Ey Esino (0.111)sin90° 0.111m =
And
Fr=Fcose (0.234) cos300° 0.117m = Fy = Fsin0 (0.234) sin300°-0.203m
So the components of the vector sum are
Rr Ex+Fr=0+0.1170.117m =
Ry = EyFy 0.111 -0.203-0.092m
The magnitude of the vector sum is
R= |R² + R² = √(0.117)2 + (−0.092)2 = 0.149m
Therefore, The magnitude of their vector sum is 0.149 m.
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A positive test charge is brought near to, but not touching a conducting sphere that is connected to the ground. Both objects remain at rest in the positions shown above. Charge begins to flow from the ground to the sphere. Which of the following statements best describes when charge stops flowing and provides justification for the claim? Charge will flow until the electric field at the surface of the sphere is equivalent to the electric field of the test charge, because then the excess charge on the surface of the sphere will be equal to the charge of the test charge Charge will flow until the electric field at the surface of the sphere is equivalent to the electric field of the test charge, because then the net force on all charges on the surface of the sphere will be zero Charge will flow until the potential at the surface of the sphere is the same as the potential of the test charge, because then the net force on all charges on the surface of the sphere will be zero. Charge will flow from the ground to the sphere until the potential is the same everywhere within the sphere, because then the excess charge on the surface of the sphere will be equal to the charge of the test charge. Charge will flow from the ground to the sphere until the potential is the same everywhere within the sphere, because then the net force on all charges on the surface of the sphere will be zero
The correct statement is option - {D} : Charge will flow from the ground to the sphere until the potential is the same everywhere within the sphere, because then the net force on all charges on the surface of the sphere will be zero
What is a conducting sphere?A conducting sphere will have the complete charge on its outside surface and the electric field intensity inside the conducting sphere will be zero.For a spherical charged shell the entire charge will reside on outer surface and again there will be no field anywhere inside itGiven is a positive test charge is brought near to, but not touching a conducting sphere that is connected to the ground. Both objects remain at rest in the positions shown above. Charge begins to flow from the ground to the sphere
When charge stops flowing, charge will flow from the ground to the sphere until the potential is the same everywhere within the sphere, because then the net force on all charges on the surface of the sphere will be zeroTherefore, the correct statement is option - {D} : Charge will flow from the ground to the sphere until the potential is the same everywhere within the sphere, because then the net force on all charges on the surface of the sphere will be zero
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Select the statement(s) that accurately describe why people have to prepare for natural disasters.
1. People have to prepare for natural disasters in order to reduce the risk of injury, death, and property damage caused by the disaster.
What is natural disasters?Natural disasters are adverse events that occur naturally and are a result of the interaction between the physical environment and human activities. They can include floods, hurricanes, tornadoes, earthquakes, tsunamis, wildfires, landslides, volcanic eruptions, and extreme weather events. Natural disasters can have devastating impacts on communities, including loss of life, damage to property, displacement, and destruction of livelihoods. Governments, organizations, and individuals are increasingly working to reduce the impacts of natural disasters through improved risk management, infrastructure planning, and disaster response and recovery efforts.
2. People have to prepare for natural disasters in order to be able to respond quickly and efficiently in the event of an emergency.
3. People have to prepare for natural disasters in order to plan for the financial impacts of the disaster.
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Two vectors lie with their tails at the same point. When the angle between them is increased by 20 their scalar product has the same magnitude but changes from positivr to negative .the original angle between them was?
Answer:
I need help
with that
Explanation:
so some one how can help me plis
I need help with that thing so I can not get
The original angle between the two vectors was 20.91 degrees. when two vectors lie with their tails at the same point but change from positive to negative.
The angle between the vectors is increased by 20 degrees, their scalar product changes sign, we can set up the following equation:
cos(θ + 20) = -cos(θ)
cos(θ)cos(20) - sin(θ)sin(20) = -cos(θ)
cos(θ)(cos(20) + 1) = sin(θ)sin(20)
cot(θ) = -tan(20)
θ = tan⁻¹(-tan(20))
θ ≈ -20.91 degrees
Therefore, the original angle between the two vectors was 20.91 degrees.
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for the following reaction, what are the products and what are the reactants? 2Na+Cl->2NaCl
Answer:
This can be understood by saying that two sodium atoms combine with one diatomic chlorine molecule to form two ionic units of sodium chloride. Another aspect of chemical reactions is the physical properties of compounds, or how atoms and molecules fit together.
Explanation:
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A car is driving counterclockwise on a circular path, moving at non-uniform speed. The small black circles in the figure show the position of the object in equal intervals of time.
a- The x component of the instantaneous acceleration at B is negative, positive or zero? Why?
b- The y component of the instantaneous acceleration at B is negative, positive or zero? Why?
a- The instantaneous acceleration at B has a negative x component.
b- The instantaneous acceleration at B has a positive y component.
Explain about the uniform circular motion?We refer to a particle as being in uniform circular motion when it is traveling in a circular path (and perhaps a portion of one) at a constant speed.
The object is accelerating despite the fact that its speed is remaining constant because of a change in direction in its velocity (v).We refer to a particle moving uniformly around a circle as having a centripetal acceleration owing to the direction of the acceleration, which is toward the center.It is useful to discuss the time T required for the particle to accomplish one full trip around the circle if the particle consistently follows a complete circular path. This is referred to as the motion's period.On a round, counterclockwise route, an automobile is traveling at an irregular speed.
The position of a object is depicted in the figure's tiny black circles at regular intervals of time.
a- The instantaneous acceleration at B has a negative x component.
Because the x-component of the velocity will be be along the negative x axis, which will be directed towards point D.
b- The instantaneous acceleration at B has a positive y component. Because, the y-component of the velocity will be be along the positive y-axis, which will be directed towards point C.
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A sea breeze is when the cooler air over the ocean moves in toward land.
true or false
your father brought you a pairof shoes when you wore the shoes you realized there was problem the shoes were too long why might such a problem arise and how can it be mitigated
The shoes were two long because the accurate measurement of the foot size was not carefully by your father.
What are shoes?It is a type of footwear used to protect the human foot completely.
Given is that your father brought you a pair of shoes when you wore the shoes you realized there was problem the shoes were too long.
The shoes were two long because the accurate measurement of the foot size was not carefully by your father.
Therefore, the shoes were two long because the accurate measurement of the foot size was not carefully by your father.
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zhangjin xu the jet engine of an airplane takes in 120 kg of air per second, which is burned with 4.2 kg of fuel per second. the burned gases leave the plane at a speed of 550 m/s (relative to the plane). If the plane is traveling 270 m/s (600 mi/h ), determine the following quantities. Part A - The thrust due to ejected fuel. Part B - The thrust due to accelerated air passing through the engine. Express your answer using two significant figures. Part C - The power (hp) delivered. Express your answer using two significant figures.
Therefore, the thrust due to ejected fuel is 2310 N, the thrust due to accelerated air passing through the engine is 98340 N, and the power delivered is 3260 hp.
What is acceleration?Acceleration is the rate of change of velocity of an object with respect to time. It is a vector quantity, meaning that it has both magnitude and direction. Acceleration occurs when an object changes its speed, its direction, or both. A positive acceleration means that the speed of an object is increasing, while a negative acceleration (also called deceleration) means that the speed of an object is decreasing. The standard unit of acceleration is meters per second squared.
Here,
To solve this problem, we can use the principle of conservation of momentum, which states that the total momentum of a system is conserved when there are no external forces acting on it. In this case, we can assume that the airplane and the burned gases form a closed system, so the total momentum of the system is conserved.
Part A: To find the thrust due to ejected fuel, we can use the equation:
Thrust = (mass flow rate of fuel) x (exit velocity of burned gases)
Thrust = (4.2 kg/s) x (550 m/s) = 2310 N
Part B: To find the thrust due to accelerated air passing through the engine, we can use the equation:
Thrust = (mass flow rate of air) x (exit velocity of air) + (mass flow rate of fuel) x (exit velocity of burned gases)
The mass flow rate of air is 120 kg/s, and the exit velocity of air is the sum of the speed of the airplane and the speed of the air relative to the airplane. We can use the formula for the velocity addition to find the exit velocity of air:
exit velocity of air = speed of airplane + speed of air relative to airplane
exit velocity of air = 270 m/s + 550 m/s = 820 m/s
Now we can substitute the values into the equation:
Thrust = (120 kg/s) x (820 m/s) + (4.2 kg/s) x (550 m/s)
Thrust = 98340 N
Part C: To find the power delivered by the engine, we can use the equation:
Power = Thrust x Velocity
We can use the speed of the airplane as the velocity, since this is the speed at which the engine is delivering thrust to the airplane. The speed of the airplane is 270 m/s, which is equivalent to 603 mi/h. To convert the thrust from Newtons to pounds-force (lbf), we can divide by the conversion factor 4.448 N/lbf. Then we can use the following formula to convert the power from watts to horsepower:
1 hp = 746 W
Substituting the values into the equation, we get:
Power = (98340 N / 4.448 N/lbf) x (603 mi/h) / (3600 s/h) x (1 hp / 746 W)
Power = 3260 hp
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A data set of current new job openings in the banking industry is best shown in a _____________.
After the 2008 financial crisis, the banking sector was significantly weaker than it is today.
What exactly is finance?It is the act of directing various financial resources—such as credit, loans, and invested capital—to those parts of the economy that need them most or can use them most effectively.
Business financing is necessary for carrying out all other commercial transactions as well as for the acquisition of assets, goods, and raw materials.
Which city has the capital?Such as a plant and its equipment, patents, monetary assets of a company or an individual, or intellectual property. Whatever a company holds that helps create money is considered capital. Many sources of capital.
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5. An incredible amount of energy holds the protons and neutrons together in the center of atoms. This type of
energy is known as
O A. chemical energy.
B. nuclear energy.
C. electrical energy.
O D. thermal energy.
An incredible amount of energy holds the protons & neutrons together in the center of atoms. This type of energy is known as nuclear energy. Thus, option B is correct.
What is nuclear energy?A type of energy released from an atom's nucleus, which is composed of protons & neutrons, is known as nuclear energy. Fission, which occurs when atom nuclei split into multiple pieces, and fusion, which occurs when nuclei combine, are the two ways in which this source of energy can be created.
An atom's nucleus splits into two or more smaller nuclei during a reaction known as nuclear fission, which also releases energy.
For instance, the nucleus of an atom of uranium-235 splits into two smaller nuclei, such as a barium & a krypton nucleus, as well as two or three neutrons when struck by a neutron. As a result of these extra neutrons striking nearby uranium-235 atoms, those atoms will split and produce an increasing number of neutrons.
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Please help me find the final answer for this vectors problem!!
The magnitude of the sum of the vectors is 58.3 N.
What is resultant of the two vectors?The resultant of the two vectors is calculated by resolving the vectors as follows;
The sum of the x - component of the vectors is calculated as follows;
Vx = V cos (θ)
where;
V is the magnitude of the vectorVx is the x component of the vectorθ is the inclination of the vector above the horizontalVx = 30 cos (45) + 50 cos (45)
Vx = 56.57 N
The sum of the y - component of the vectors is calculated as follows;
Vy = 30 sin (45) - 50 sin (45)
Vy = -14.14 N
The magnitude of the sum of the vectors;
V = √ (56.56² + (-14.14²)
V = 58.3 N
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