Answer:
An element becomes a positively charged ion when it losses electron.
Explanation:
Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge (commonly carried by protons and electrons respectively). Unlike charges attract one another while like charges repel one another. Neutral refers to an object that carries no net charge.
Electric charge is a conserved attribute, meaning that the net charge—that is, the sum of the positive and negative charges in an isolated system—cannot change. Subatomic particles carry an electric charge. In the nuclei of atoms, protons have positive charge and electrons carry negative charge in normal matter.
So, an element becomes a positively charged ion when it loses negative charge, that is, electron.
A 3.7 kg block is being pulled up a rough incline, where θ= 21° and μk= 0.17, with an acceleration of 0.3 m/s/s. What is the magnitude of the Tension force pulling the block up the incline?
Explanation:
Fn= normal force ( this determines the Ff friction)
Fn = mg cosΘ = 3.7 * 9.81 cos (21 ) = 33.88 N
Ff = 33.88 N * .17 = 5.76 N
Fdp = force downplane = mg sinΦ = 3.7 * 9.81 sin 21 = 13.01 N
Total forces acting down the plane = 13.01 + 5.76 = 18.77 N
T = The force acting up the plane to move and accelerate the block
Then :
F= ma
(T - 18.77 N) = 3.7 kg ( .3 m/s^2 )
T = 19.88 N
if both the graph representing the constant net force and the graph representing the variable net force represent the same impulse acting on the baseball, which geometric properties must the two graphs have in common?
The impulse acting on an object is equal to the change in momentum it experiences. When we talk about net force, we're really talking about the rate at which momentum is changing. A constant net force means that momentum is changing at a constant rate, while a variable net force means that momentum is changing at a changing rate.
Now, if both graphs represent the same impulse acting on the baseball, it means that they both represent the same change in momentum. This tells us that the area under both graphs must be the same. This is because the area under a force-time graph represents the impulse experienced by an object.
So, in terms of geometric properties, the two graphs must have the same area under them if they represent the same impulse acting on the baseball. This holds true whether the net force is constant or variable.
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The amount of deformation a material experiences due to an applied force is called
The amount of deformation a material experiences due to an applied force is called strain.
The amount of deformation a material experiences due to an applied force is called strain. Strain is a measure of the degree to which a material is stretched or compressed under a given load, and it is typically expressed as a ratio of the change in length or shape of the material to its original length or shape.
Strain can be categorized into several types, including tensile strain, compressive strain, shear strain, and volumetric strain, depending on the type of deformation that occurs.
Tensile strain occurs when a material is stretched along its length, while compressive strain occurs when a material is compressed or shortened along its length.
Shear strain occurs when a material is subjected to a parallel force that causes it to slide or twist along a plane, while volumetric strain occurs when a material experiences a change in volume due to pressure.
Overall, the concept of strain is important in materials science and engineering, as it helps to describe the behavior of materials under different types of loads and can be used to design and optimize materials for specific applications.
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a canon on rollers fires a canon ball and rolls backward. which of the following are true statements?multiple select question.the momentum of the canon is greater than the canon ball's momentum.the momentums of the canon and canon ball are equal.the speeds of the canon and canon ball are equalthe speed of the canon ball is greater than the canon's speed.the speed of the canon is greater than the canon ball's speed.the momentum of the canon ball is greater than the canon's momentum.
The momentums of the canon and canon ball are equal. The speed of the canon ball is greater than the canon's speed. The momentum of the canon ball is greater than the canon's momentum.
Based on the scenario provided, the following statements are true:
1. The momentums of the canon and canon ball are equal. (According to the law of conservation of momentum, the total momentum before firing is equal to the total momentum after firing. Since the canon and canon ball move in opposite directions, their momentums are equal but opposite in direction.)
2. The speed of the canon ball is greater than the canon's speed. (Typically, the mass of the canon ball is much smaller than the mass of the canon. As their momentums are equal, the canon ball will have a higher speed compared to the canon.)
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A 25.0-mH inductor, a 2.00-μF capacitor, and a certain resistor are connected in series across an ac voltage source at 1000 Hz. If the impedance of this circuit is 200 Ω, what is the resistance of the resistor?A) 100 Ω B) 184 Ω C) 200 Ω D) 552 Ω E) 579 Ω
The correct option is B, The resistance of the resistor is 184 Ω.
Z = √(R² + (Xl - Xc)²)
where R is the resistance, Xl is the inductive reactance, and Xc is the capacitive reactance.
Xl = Xc
2πf0L = 1/(2πf0C)
f0 = 1/(2π√(LC))
f0 = 1/(2π√(25.0 mH * 2.00 μF))
f0 = 1000 Hz
we can use the resonance frequency to calculate the reactances Xl and Xc at this frequency:
Xl = 2πfL = 2π(1000 Hz)(25.0 mH) = 157.1 Ω
Xc = 1/(2πfC) = 1/(2π(1000 Hz)(2.00 μF)) = 79.58 Ω
Now we can use the impedance formula to solve for the resistance R:
Z = √(R² + (Xl - Xc)²) = 200 Ω
R² + (Xl - Xc)² = 200²
R² + (157.1 Ω - 79.58 Ω)² = 40000
R² + 6104.6 Ω² = 40000
R² = 33895.4 Ω²
R = 184 Ω
A resistor is an electrical component designed to impede the flow of electric current. It is a passive two-terminal device that resists or limits the amount of current that flows through it. Resistors are commonly used in electronic circuits to control current, voltage, and power levels.
A resistor's resistance is measured in ohms (Ω), which is the ratio of the voltage applied across it to the current flowing through it. Resistors are made of various materials, including carbon, metal, and ceramic. The resistance value of a resistor can be fixed or variable, depending on its intended use. Resistors are crucial components in many electronic devices, such as radios, televisions, computers, and mobile phones.
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When is the kinetic energy of the mass a maximum?
When the spring is at its unweighted length (when it isn't stretched or compressed)
When the spring is most stretched
When the spring is most compressed
Both when the spring is most compressed and when the spring is most stretched
The kinetic energy of the mass is a maximum both when the spring is most compressed and when the spring is most stretched.
This is because at these points, the spring is exerting the maximum force on the mass, causing it to accelerate and reach its maximum kinetic energy. When the spring is at its unweighted length, there is no force being applied to the mass by the spring, so the kinetic energy is not at its maximum.
The kinetic energy of the mass is at its maximum when the spring is at its unweighted length (when it isn't stretched or compressed). At this point, all the potential energy stored in the spring has been converted into kinetic energy, resulting in maximum motion of the mass.
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in 2006, pluto was declared a dwarf planet. the three criteria for planethood are: 1.) it orbits the sun 2.) it must be gravitationally rounded 3.) it must have cleared the neighborhood around its orbit what of these criteria is pluto missing?
Pluto is missing the third criterion for planethood which states that 3, it must have cleared the neighborhood around its orbit.
What is the planet Pluto about?Pluto is a dwarf planet in our solar system, located in the Kuiper Belt beyond the orbit of Neptune. It was discovered in 1930 and was considered the ninth planet in our solar system until 2006, when it was reclassified as a dwarf planet due to its size and failure to meet the third criterion for planethood, which states that a planet must have cleared its orbit of other debris.
Pluto has five known moons and is primarily composed of rock and ice. It has a highly elliptical orbit that takes it closer to the sun than Neptune at certain points, but also farther away than any other planet in our solar system.
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In its first second of free fall, a dropped softball will fall a vertical distance of _______.
a dropped softball will fall a vertical distance of approximately 4.9 meters (16.1 feet) during the first second of free fall, neglecting air resistance.
When an object is dropped from rest near the surface of the Earth, it is subject to the force of gravity, which causes it to accelerate downwards. The acceleration due to gravity is approximately 9.8 meters per second squared, which means that the velocity of the object increases by 9.8 meters per second (or 32.2 feet per second) for each second it falls.
During the first second of free fall, the object starts from rest and accelerates at a constant rate of 9.8 meters per second squared. Using the equations of motion, we can calculate the distance it falls during this time:
d = 1/2 * a * t^2
where d is the distance, a is the acceleration, and t is the time. Plugging in the values for the first second of free fall, we get:
d = 1/2 * 9.8 m/s^2 * (1 s)^2
d = 4.9 meters
Therefore, a dropped softball will fall a vertical distance of approximately 4.9 meters (16.1 feet) during the first second of free fall, neglecting air resistance.
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Loose objects on the dashboard slide to the right when the car turns suddenly to the left because
Loose objects on the dashboard slide to the right when the car turns suddenly to the left because they have inertia
When loose objects are placed on the dashboard of a car, they may slide to the right when the car turns suddenly to the left. objects at rest tend to stay at rest and objects in motion tend to stay in motion. As the car turns left, there is a force pushing the loose objects to the right, and gravity alone is not strong enough to hold them in place. Therefore, the objects slide to the right due to their inertia. To prevent this, it's best to secure loose objects on the dashboard or remove them altogether to ensure safety while driving.
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Other Types of Inhibition
1) What is uncompetitive inhibition? What decreases?
2) What is mixed inhibition?
Uncompetitive inhibition reduces the maximum rate of the reaction and apparent affinity by binding to the enzyme-substrate complex. In contrast, mixed inhibition alters both the maximum rate and apparent affinity by binding to both the enzyme and the enzyme-substrate complex.
In uncompetitive inhibition, the inhibitor can only bind to the enzyme-substrate complex, not the free enzyme or the free substrate. This type of inhibition results in a decrease in both the maximum rate of the reaction and the apparent affinity of the enzyme for the substrate, as the inhibitor binds to the complex and prevents the release of the product.
In mixed inhibition, the inhibitor can bind to both the free enzyme and the enzyme-substrate complex, leading to a decrease in the maximum rate of the reaction and a change in the apparent affinity of the enzyme for the substrate. The inhibitor can either enhance or reduce the affinity of the enzyme for the substrate.
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21. What is the tangential speed of Nairobi, Kenya, a city near the equator? The earth makes one revolution every 23.93 h and has an equatorial radius of 6380 km.
A) 74.0 m/s
B) 116 m/s
C) 148 m/s
D) 232 m/s
E) 465 m/s
The tangential speed of Nairobi, Kenya, near the equator is approximately 465 m/s .
To calculate the tangential speed of Nairobi, Kenya, which is a city near the equator, we will use the following formula:
Tangential speed (v) = 2 × π × radius (r) / time period (T)
Here, the equatorial radius of the Earth (r) is 6,380 km (which we need to convert to meters), and the Earth completes one revolution in 23.93 hours (which we need to convert to seconds).
1. Convert the radius to meters:
r = 6,380 km * 1,000 m/km = 6,380,000 m
2. Convert the time period to seconds:
T = 23.93 hours * 60 min/hour * 60 s/min = 86,078.8 s
3. Calculate the tangential speed:
v = (2 × π × 6,380,000 m) / 86,078.8 s ≈ 465 m/s
So, the tangential speed of Nairobi, Kenya, near the equator is approximately 465 m/s. The correct answer is E) 465 m/s.
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A glider of mass m is free to slide along a horizontal air track. It is pushed against a launcher at one end of the track. Model the launcher as a light spring of force constant k compressed by a distance x. The glider is released from rest.
(a) Show that the glider attains a speed of
v = x(k/m)1/2
(b) Show that the magnitude of the impulse imparted to the glider is given by the expression
I = x(km)1/2
(c) Is more work done on a glider with large or a small mass?
large mass small mass the work done is the same on each
This energy is converted into kinetic energy of the glider. Thus, the speed of the glider is given by the equation v = (2W/m)1/2 = x(k/m)1/2.
What is kinetic energy?Kinetic energy (KE) is the energy of motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Kinetic energy is directly proportional to the mass of the object and to the square of its velocity.
(a) The glider is initially at rest. As it is pushed against the launcher, the spring is compressed by a distance x. The work done by the spring on the glider is W = ½kx2. This energy is converted into kinetic energy of the glider. Thus, the speed of the glider is given by the equation
v = (2W/m)1/2 = x(k/m)1/2
(b) Momentum is conserved during the collision, so the impulse imparted to the glider is the same as the change in momentum of the glider. Since the glider is initially at rest, the change in momentum is equal to the final momentum. This is equal to the mass of the glider multiplied by its final speed, so the impulse is given by
I = mv = x(km)1/2
(c) The work done on the glider is equal to the energy imparted to the glider, which is W = ½kx2. This is independent of the mass of the glider, so more work is done on a glider with a large or a small mass.
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Un vuelo internacional parte a las 16 horas 35min 47sg, si el viaje dura 10horas 40 min y 35seg, a que hora llega a su destino
To find the arrival time of an international flight, we add the duration of the trip to the departure time. In this case, the flight arrives at 3:16:22 AM.
The problem presents a scenario in which we are given the departure time of an international flight and its duration, and we are asked to determine the arrival time.
To solve this, we simply add the duration of the trip to the departure time. In this case, we added 10 hours, 40 minutes, and 35 seconds to the departure time of 4:35:47 PM.
4:35:47 PM + 10 hours, 40 minutes, 35 seconds = 3:16:22 AM
Therefore, the flight arrives at its destination at 3:16:22 AM. The resulting time, 3:16:22 AM, is the arrival time at the destination.
It is important to note that we used the 24-hour clock to represent the times in this problem, which is commonly used in international travel.
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If your car has a mass of 741 kg, how much force is required to accelerate it forward at 4.88 m/s2?
Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass
To calculate the force required to accelerate the car forward at 4.88 m s2, we need to use the formula F = m x a, where F is force, m is mass, and a is acceleration. F = 741 kg x 4.88 m/s2F = 3,613.08 N Therefore, a force of 3,613.08 Newtons is required to accelerate the car forward at 4.88 m s2. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass or velocity (miles per hour per second, millimeters per second2, etc. could certainly be used as well - the calculation is the same regardless.
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Current Carrying Conductors(310-15(B)(5) : The neutral conductor of a balanced 3-wire delta circuit, or 4 wire wye circuit is considered a current-carrying conductor for the purpose of applying the derating factors in Table 310-15(b)(2a).
In an electrical circuit, current flows through conductors. When current flows through a conductor, the conductor heats up due to the resistance of the material.
This heat can cause the conductor to degrade over time and eventually fail, which can be dangerous or cause equipment damage. Therefore, the National Electrical Code (NEC) provides guidelines on how to calculate the proper size of conductors based on the amount of current they will carry and the ambient temperature they will be exposed to.
According to NEC 310-15(B)(5), the neutral conductor in a balanced 3-wire delta or 4-wire wye circuit is considered a current-carrying conductor for the purpose of applying derating factors, which means that the neutral conductor must be sized accordingly to ensure safe and reliable operation of the electrical system.
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Full Question: Current Carrying Conductors(310-15(B)(5) : The neutral conductor of a balanced 3-wire delta circuit, or 4 wire wye circuit is considered a current-carrying conductor for the purpose of applying the derating factors in Table 310-15(b)(2a).
image attached
Question 2 Marks: 1 Office space should provide at least ______ per minute per occupant of clean outside air at minimum where smoking is not prohibited.Choose one answer. a. 5 ft3 b. 10 ft3 c. 20 ft3 d. 30 ft3
The correct answer is d. 30 ft3. Office spaces should provide at least 30 ft3 per minute per occupant of clean outside air at minimum where smoking is not prohibited.
Office space should provide at least 20 ft3 per minute per occupant of clean outside air at minimum where smoking is not prohibited. The correct answer is c. 20 ft3.
Smoking bans or smoke-free laws are public policies that prohibit smoking in certain areas, including laws and safety practices, work, and health. However, the law will also prohibit smoking in open areas such as parks, beaches, pedestrian squares, universities, and hospitals, away from the patient, home entrances, and sometimes in private vehicles and many apartments.
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section 2.5An anion is defined asA) a charged atom or group of atoms with a net negative charge.B) a stable atom.C) a group of stable atoms.D) an atom or group of atoms with a net positive charge
An anion is defined as:A) a charged atom or group of atoms with a net negative charge.
An anion is formed when an atom gains one or more electrons, resulting in a negative charge due to the increased number of negatively charged electrons compared to positively charged protons in the atom.An anion is an ion with a negative charge. It is formed when an atom or group of atoms gains one or more extra electrons, giving it a net negative charge. Examples of common anions include chloride (Cl-), sulfate (SO42-), and carbonate (CO32-). Therefore, the term "anion" specifically refers to a negatively charged ion or species.
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cationic polymer is being applied at a 8.0 MGD treatment plant at a rate of 0.80 pounds per hour. If the plant currently has 750 pounds of this treatment chemical in storage, how many days will this supply last
The supply of cationic polymer will last approximately 39 days.
To determine how many days the supply will last, we need to calculate how many pounds of cationic polymer are used per day.
First, we convert the flow rate from million gallons per day (MGD) to gallons per day (GPD):
8.0 MGD = 8.0 million gallons/day = 8,000,000 gallons/day
Then, we convert the rate of cationic polymer application from pounds per hour to pounds per day:
0.80 pounds/hour x 24 hours/day = 19.2 pounds/day
Finally, we can calculate how many days the 750-pound supply will last:
750 pounds ÷ 19.2 pounds/day ≈ 39.06 days
Therefore, the supply of cationic polymer will last approximately 39 days.
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With tubes of equal length and diameter, which tube will have the highest flow?a. in = 100 mmHg, out = 65 mmHgb. in = 325mmHg, out = 275mmHgc. in = 75mmHg, out = 20mmHgd. in = 70mmHg, out = 10mmHg
The tube with an in and out pressure of 325 and 275 mmHg will have the highest flow.
This is so because the pressure differential between the tube's two ends directly proportionally affects flow rate. The flow rate increases with increasing pressure differential. With a pressure difference of 50mmHg in this instance, option b will have the maximum flow rate. Options a, c, and d will have lower flow rates since they have smaller pressure variations, measuring 35mmHg, 55mmHg, and 60mmHg, respectively. The tube with an in and out pressure of 325 and 275 mmHg will have the highest flow. This is so because the pressure differential between the tube's two ends directly proportionally affects flow rate. Option B will have the highest flow rate because it has the largest pressure difference, which is 50mmHg.
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Two objects of equal mass traveling toward each other withequal speeds undergo a head on collision. Which one of thefollowing statements concerning their velocities after thecollision is necessarily true?A. They exchange velocityB. Their velocities will be reducedC. Their velocities will be unchangedD. Their velocities will be zeroE. Their velocities may be zero.
The correct answer is B. Their velocities will be reduced. When two objects of equal mass traveling toward each other withequal speeds undergo a head on collision their velocities will reduced.
When two objects of equal mass collide head-on, the total momentum of the system is conserved. However, the kinetic energy of the system may not be conserved, as some of it may be converted into other forms of energy such as heat or sound.
During the collision, the two objects exert equal and opposite forces on each other, causing their velocities to change. Because the objects have equal masses and speeds, their velocities will be equal in magnitude and opposite in direction after the collision.
Therefore, the net momentum of the system will still be zero, but the kinetic energy of the system will be lower than before the collision.
In a perfectly elastic collision, where no energy is lost to other forms, the velocities of the objects would be exchanged, meaning that they would essentially switch directions.
However, in a real-world scenario, some energy is typically lost to other forms, resulting in a decrease in the velocities of the objects. Therefore, statement B is necessarily true. Statements A, C, D, and E are not necessarily true in all scenarios.
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(390-8) When an outlet from an underfloor raceway is discontinued, the circuit conductors supplying the outlet _____.
When an outlet from an Underfloor raceway is discontinued, the circuit conductors supplying the outlet must be disconnected, isolated, and insulated from any possible contact with other conductors. This ensures safety and prevents potential short circuits or other electrical hazards. The underfloor raceway is a system used in commercial buildings to distribute electrical power and data cabling underneath the raised floor. It typically consists of metal or plastic conduit channels installed below the floor surface, providing a concealed pathway for routing electrical conductors.
The circuit conductors supplying power to that outlet are disconnected and terminated properly. This may involve removing the outlet box, disconnecting the conductors from the circuit breaker or fuse panel, and properly capping or terminating the conductors to ensure they are safely and securely isolated from the electrical system. Following local electrical codes and best practices is essential to ensure the safe and efficient operation of the electrical system.
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37. A satellite follows a circular path with constant speed around a planet. Which one of the following quantities is constant and non-zero for this satellite?
A) linear velocity
B) angular velocity
C) centripetal acceleration
D) angular acceleration
E) total acceleration
B) angular velocity. When the speed of the satellite follows a circular path around a planet, its velocity remains constant but its direction changes constantly. This means that the satellite has a non-zero angular velocity, which is the rate at which the satellite rotates around the planet.
The linear velocity, or the speed of the satellite, is also constant but its direction changes constantly as well. The centripetal acceleration is the force that keeps the satellite moving in a circular path, and it is directed towards the center of the circle. This acceleration changes the direction of the satellite's velocity but not its speed. The angular acceleration is the rate at which the angular velocity of the satellite changes, and it is zero in this case because the satellite has a constant angular velocity. The total acceleration of the satellite is the vector sum of its centripetal acceleration and any other forces acting on it, but it is not constant and may change in magnitude and direction over time. Therefore, the only quantity that is constant and non-zero for a satellite following a circular path around a planet is its angular velocity.
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(110-14(c)(1) )What size THHN conductor is required for a 50 ampere circuit, listed for use at 60 degrees C?
A THHN conductor with a size of #6 AWG is required for a 50-ampere circuit at 60 degrees Celsius.
According to 110-14(c)(1), a conductor must be sized based on the ampacity (current-carrying capacity) it can handle.
For a 50 ampere circuit, a THHN conductor with an ampacity of at least 50 amperes is required. However, the ampacity of a conductor can also depend on its temperature rating. Since this question specifies a temperature rating of 60 degrees Celsius, we need to consult the ampacity tables for THHN conductors rated for 60 degrees Celsius. According to the table, a THHN conductor with a size of #6 AWG is required for a 50-ampere circuit at 60 degrees Celsius.
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a ball dropped from a height of m makes an elastic collision with the ground. assuming no decrease in mechanical energy due to air resistance, (a) show that the ensuing motion is periodic and (b) determine the period of the motion. (c) is the motion simple harmonic? explain.
a. The ball bounces back up to its original height after each collision. b. The period of the motion depends only on the mass of the ball and the strength of gravity. c. the motion is not sinusoidal .
Define the terms "collision" and "resistance." A collision occurs when two objects come into contact with each other and exchange momentum and/or energy. Resistance, in the context of physics, refers to any force that opposes motion or energy transfer.
Now, let's apply these concepts to the question at hand. A ball dropped from a height of m undergoes an elastic collision with the ground, which means that there is no loss of mechanical energy due to the collision. This implies that the ball will rebound back up to its original height.
(a) To show that the ensuing motion is periodic, we need to demonstrate that the ball's motion repeats itself over time. Since the ball bounces back up to its original height after each collision, we can see that the motion is indeed periodic.
(b) The period of the motion is the time it takes for one complete cycle. In this case, one complete cycle consists of the ball falling from its original height, colliding with the ground, and rebounding back up to its original height. The time it takes for the ball to complete this cycle can be calculated using the formula:
T = 2 × √(m/g)
where T is the period of the motion, m is the mass of the ball, and g is the acceleration due to gravity. This formula tells us that the period of the motion depends only on the mass of the ball and the strength of gravity, and is independent of the height from which the ball is dropped.
(c) The motion of the ball is not simple harmonic because it does not follow the equation of motion for a simple harmonic oscillator, which is:
x = A × cos(ωt + Ф)
where x is the displacement of the oscillator, A is the amplitude of the motion, ω is the angular frequency, t is time, and Ф is the phase angle. In the case of the ball bouncing off the ground, the motion is not sinusoidal and does not follow this equation.
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A person slaps her leg with her hand, which results in her hand coming to rest in a time interval of 2.65 ms2.65 ms from an initial speed of 4.25 m/s4.25 m/s . What is the magnitude of the average contact force exerted on the leg, assuming the total mass of the hand and the forearm to be 1.75 kg1.75 kg ?
The magnitude of the average contact force exerted on the leg assuming the total mass of the hand and the forearm to be 1.75 kg1.75 kg is 554 N.
To solve this problem, we can use the equation F = Δp/Δt, where F is the average contact force, Δp is the change in momentum, and Δt is the time interval.
The change in momentum is given by Δp = mΔv, where m is the mass of the hand and forearm and Δv is the change in velocity. We can find Δv by using the formula Δv = v_f - v_i, where v_f is the final velocity (0 m/s, since the hand comes to rest) and v_i is the initial velocity (4.25 m/s). Substituting these values, we get Δv = -4.25 m/s. The mass of the hand and forearm is given as 1.75 kg.
Therefore, Δp = mΔv = (1.75 kg)(-4.25 m/s) = -7.44 kg⋅m/s.
Now we can substitute this value along with the time interval of 2.65 ms (which is 0.00265 s) into the equation F = Δp/Δt to get the average contact force:
F = Δp/Δt = (-7.44 kg⋅m/s)/(0.00265 s) = -2804.72 N
The negative sign indicates that the force is in the opposite direction of the motion, which is expected since the hand is slowing down. To get the magnitude of the force, we can take the absolute value:
|F| = 2804.72 N ≈ 554 N
So the magnitude of the average contact force exerted on the leg is approximately 554 N.
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Torque Equilibrium: ICA 1
1. In the image above a force of 2.5 N is being applied to the wrench. Calculate the torque. (Remember we should
only use units of meters)
15 cm
25N
The torque applied to the wrench is 0.375 Nm.
To calculate the torque, we need to know the distance between the force and the pivot point, and the magnitude of the force. The torque can be calculated using the formula:
Torque = Force x Distance x sin(theta)
where theta is the angle between the force vector and the line connecting the force to the pivot point. In this case, the force is applied perpendicular to the wrench, so theta is 90 degrees and sin(theta) is 1. Therefore, we can simplify the formula to:
Torque = Force x Distance
We are given the magnitude of the force as 2.5 N, and the distance from the force to the pivot point (the nut) as 15 cm. To use the formula, we need to convert the distance to meters:
Distance = 15 cm = 0.15 m
Now we can calculate the torque:
Torque = Force x Distance
= 2.5 N x 0.15 m
= 0.375 Nm
Therefore, the torque applied to the wrench is 0.375 Nm.
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The most commonly used meter on small domestic services?
a. Venturi meter
b. Propeller meter
c. Orifice plate meter
d. Nutating disc meter
The most commonly used meter on small domestic services is the d.nutating disc meter.
This type of meter is typically used in residential and small commercial applications to measure the flow of water, gas, or other liquids. The nutating disc meter works by using a disc that rotates within the flow of the liquid being measured. As the disc rotates, it creates a measurable flow that can be used to determine the amount of liquid passing through the meter. One of the reasons why the nutating disc meter is so commonly used is because of its accuracy. These meters are typically very precise and can measure small amounts of liquid with great accuracy. This is especially important in residential applications where water usage is often measured in small increments.
Another advantage of the nutating disc meter is its durability. These meters are typically made from high-quality materials that are designed to withstand years of use without breaking down or wearing out. This is important in residential applications where meters may be exposed to a wide range of environmental factors, such as temperature fluctuations, exposure to sunlight, and other elements. Therefore, the correct answer is option d.
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An average male weighs approximately 84 kg. If the man is standing on one leg, what normal force is being produced by the ground upwards on the leg.
Assuming that the man is standing still on a flat, horizontal surface and neglecting air resistance, the normal force produced by the ground upwards on the leg would be equal in magnitude to the weight of the man, which is given as approximately 84 kg.
Therefore, the normal force being produced by the ground upwards on the leg would be approximately 84 kg multiplied by the acceleration due to gravity (9.81 m/s^2), which gives a value of approximately 823.44 N (Newtons).
So the normal force being produced by the ground upwards on the leg is approximately 823.44 N.
(300-19, Table 300-19(A)) A 100 foot vertical run of No. 4/0 copper requires the conductors to be supported at _____ locations.
According to Table 300-19(A) in the National Electrical Code (NEC), a 100 foot vertical run of No. 4/0 copper conductors requires the conductors to be supported at a minimum of 7 locations.
At least seven support locations are required for a 100 foot vertical run of No. 4/0 copper. The support locations should be spaced no more than 20 feet apart and should be supported with a combination of rigid metal conduit (RMC), intermediate metal conduit (IMC), conduit bodies, or cable trays. In addition, the support locations must be able to support the weight of the conductors as well as any environmental factors, such as wind loading, that could affect the support structure.
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if neutrinos oscillated between five different types of neutrino during their transit from the sun to earth, then how many neutrinos would we have detected compared to what was emitted by the sun?
If neutrinos oscillated between five different types of neutrino during their transit from the sun to earth we would detect no neutrinos and would depend on the detection capabilities of our instruments and the specific types of neutrinos we are able to measure.
If neutrinos oscillated between five different types during their transit from the sun to earth, it means that the initial number of emitted neutrinos from the sun would have been spread out across these five different types. So, the number of neutrinos detected on earth would depend on how much oscillation occurred and how much of each type of neutrino was produced by the sun. However, it is estimated that about two-thirds of the emitted neutrinos from the sun are detected on earth, regardless of oscillation. It's important to note that neutrinos oscillate between three known types: electron, muon, and tau neutrinos. If they oscillated between five types, we would expect to detect a different proportion compared to what was emitted by the sun, but the exact number would depend on our ability to detect those specific types.
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