Two batteries supply current to the circuit in the figure. The figure shows the potential difference across two of the resistors and the value of the third resistor.(Figure 1). What current is supplied by the batteries?

A wall less than or equal to 14.7 m in height is the highest the player can clear.

Use the kinematic equations of motion to solve the problem. First, we can find the time it takes for the ball to travel 99.1 m horizontally:

d = vt

t = d / v

t = 99.1 m / 36.2 m/s

t ≈ 2.74 s

Now, use the vertical motion equation to find the maximum height the ball reaches:

y = yo + vot + (1/2)at²

where:

yo = 0.996 m (initial height)

vo = v sinθ = 36.2 m/s x sin(30°) ≈ 18.1 m/s (initial vertical velocity)

a = -9.81 m/s² (acceleration due to gravity, pointing downward)

t = 2.74 s (time of flight)

y = 0.996 m + 18.1 m/s x 2.74 s + (1/2) x (-9.81 m/s²) x (2.74 s)²

y ≈ 14.7 m

Therefore, the tallest wall the player can clear is a wall with a height less than or equal to 14.7 m.

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As water freezes below 4°C, the volume of the liquid shrinks and water molecule motion slows. When the temperature rises over 4 °C, the water molecules spread out and take up more space, increasing the volume.

Due to the peculiar property of water known as "Anomalous Expansion of Water," when 1 liter of water is cooled from 4°C to 0°C, the volume of the water starts to grow. Between 4°C and 0°C, water expands abnormally.

Water volume reduces as it is heated from 0°C to 4°C because the water's density will be maximum

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According to the question the efficiency of the windmill is 60%.

Efficiency is the ability to achieve maximum productivity with minimal effort, waste, or expense. It is the ratio of output to input in any system or process, and it is the measure of how well resources are used to achieve desired outcomes. Efficiency is important in all aspects of life, from businesses to households, as it helps to ensure resources are used wisely and without waste. Increased efficiency can lead to improved productivity, higher profits, and lower costs.

The actual efficiency of the windmill can be calculated using the following equation:
Efficiency = (Power Output / Power Input) x 100
Power Output = (Flow rate x Height x Density of Water) / Time
Power Input = (Area of the Windmill x Density of Air x U³) / 2
Therefore, the efficiency of the windmill is:
Efficiency = [(3.4 m³/s x 2.1 m x 1000 kg/m³) / 1] / [(π x 152 m² x 1.225 kg/m³ x 7 m/s³) / 2] x 100
Efficiency = 60%.

Therefore, the correct option is E
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The height of the slope is 323.6 meters. The slope could be calculated by using the energy conservation principle.

The force of friction prevents movement between two surfaces that are in touch with one another.

It is caused by the irregularities and imperfections in the surfaces and the molecular interactions between them. Friction can act in both the direction of motion, called kinetic friction, and opposite to the direction of motion, called static friction. The magnitude of friction depends on the nature of the surfaces in contact, the force pressing them together, and the relative speed between them.

We can use conservation of energy to solve this problem, since friction is neglected. The total mechanical energy of the system (skier + Earth) is conserved:

KE_i + PE_i = KE_f + PE_f

where PE stands for potential energy and KE for kinetic energy.

At the top of the slope, the skier has only potential energy:

PE_i = mgh

where m is the skier's mass, g is the acceleration brought on by gravity, and h is the slope's height.

KE_f = (1/2)mv²

where v denotes the skier's speed at the slope's base.

Setting the initial and final energies equal to each other, we have:

mgh + 0 = (1/2)mv² + 0

Solving for h, we get:

h = (v²)/(2g) - (1/2)h

Plugging in the given values, we get:

h = (26.5²)/(2*9.81) - (1/2)h

Simplifying and solving for h, we get:

h = 323.6 m

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The volume of the helium gas in the weather balloon, when it reaches a height of 2100 m, is 30.85 m^3.

To solve this problem, we can use the ideal gas law, which states that the product of the pressure (P), volume (V), and temperature (T) of an ideal gas is proportional to the number of particles of the gas (n) and the universal gas constant (R). Since the temperature is assumed to be constant, we can write:

P1V1 = P2V2

where P1 and V1 are the initial pressure and volume of the helium gas, and P2 and V2 are the pressure and volume at a height of 2100 m.

At sea level, the pressure is approximately 1.01×10^5 Pa, so we have:

P1 = 1.01×10^5 Pa

V1 = 25.0 m^3

At a height of 2100 m, the pressure is 0.82×10^5 Pa, so we can solve for V2:

P1V1 = P2V2

V2 = (P1*V1)/P2

V2 = (1.01×10^5 Pa * 25.0 m^3) / (0.82×10^5 Pa)

V2 = 30.85 m^3

Therefore, the volume of the helium gas in the weather balloon when it reaches a height of 2100 m is approximately 30.85 m^3.

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Answer: (D) 10

can't explain brainly keeps censoring the numbers out for some reason

The number of revolutions per minute at which the lower cord just goes slack is approximately 38.2 rpm.

To solve this problem, we need to use the concept of centripetal force and tension in the strings. When the lower string just goes slack, the tension in the string is zero and the centripetal force required for circular motion is provided only by the weight of the block.

We can start by calculating the weight of the block using the formula:

[tex]F_g[/tex] = m * g

Where [tex]F_g[/tex] is the weight, m is the mass, and g is the acceleration due to gravity. Substituting the given values, we get:

[tex]F_g[/tex] = (4.00 kg) * (9.81 m/s²) = 39.24 N

Since the tension in the upper string is 78.0 N, the net force acting on the block is:

[tex]F_{net}[/tex] = T - [tex]F_g[/tex] = 78.0 N - 39.24 N = 38.76 N

This net force provides the centripetal force required for circular motion, given by the formula:

[tex]F_{cp}[/tex] = m * v² / r

Where [tex]F_{cp}[/tex] is the centripetal force, m is the mass, v is the velocity, and r is the radius of rotation. Since we are asked to find the number of revolutions per minute, we can convert this to radians per second using the conversion factor:

1 revolution = 2π radians

1 minute = 60 seconds

Substituting the given values, we get:

Fcp = (4.00 kg) * v² / r

38.76 N = (4.00 kg) * v² / r

Solving for v²/r, we get:

v² / r = 38.76 N / 4.00 kg

v² / r = 9.69 m/s²

Next, we can use the fact that the length of the upper string is twice the length of the lower string to find the radius of rotation:

2l + l = 3l = r

Where l is the length of the lower string. Substituting the given values, we get:

3l = r = 0.600 m

Finally, we can substitute this value into the equation for v²/r to get:

v² / (0.600 m) = 9.69 m/s²

v² = 5.814 m²/s²

v = 2.41 m/s

To convert this to radians per second, we multiply by 2π and divide by the circumference of the circle:

ω = 2πv / (2πr) = v / r = 2.41 m/s / 0.600 m = 4.02 rad/s

To find the number of revolutions per minute, we can multiply this by the conversion factor:

1 radian per second = 60 / 2π revolutions per minute

N = (4.02 rad/s) * (60 / 2π) = 38.2 rpm

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The block won't move since the applied force of 20 N is less than the maximum frictional force of 23.52 N.

When an object is on a rough surface, friction is a force that acts in the opposite direction from the direction of motion. FMAX=R F MAX = R where is the coefficient of friction and R is the normal reaction between the two surfaces is the maximum or limiting value of friction between two surfaces.

[tex]F_gravity = m * g[/tex]

[tex]F_norm = F_gravity = m * g = 4 kg * 9.8 m/s^2 = 39.2 N[/tex]

[tex]F_friction = 0.6 * 39.2 N = 23.52 N[/tex]

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Explanation:

f= 50Hz

wavelength= 20m

Speed of wave (v) = frequency × wavelength

= 50×20

= 1000m/s

Answer: A solar eclipse results when the moon passes in between the earth and the sun hiding the sun fully or partly for some time. A lunar eclipse occurs when the earth passes in between the moon and the sun casting its shadow on the moon and thus hiding it fully or partly for some time.

a) The main advantages of an epicyclic gearbox are:

b) i) Using the formula for the gear ratio of an epicyclic gear train:

T4/T3 = (t2/t1) x (t5/t2) x (t4/t5)

T4/30 = (1/2) x (60/20) x (40/60)

T4 = 40 Nm

ii) From the law of gearing for an epicyclic gear train:

w21 = (t3/t2) x (t5/t4) x w31 - (t3/t2) x w2

Substituting the given values:

w21 = (30/20) x (60/40) x 200 - (30/20) x 100

w21 = 150 rad/s

iii) The fixing couple that must be applied to wheel 5 can be found from the power transmitted by the gear train:

P = w3 x T3 = w2 x T2 = w1 x T1

Substituting the given values:

9 kW = 200 rad/s x 30 Nm = w2 x T2 = w2 x 20 Nm

w2 = 450 rad/s

T2 = (9 kW) / (450 rad/s) = 20 Nm

The fixing couple that must be applied to wheel 5 is equal in magnitude and opposite in direction to T2, so it is -20 Nm.

iv) The tangential force at the pitch point between wheels 3 and 4 can be found from the formula:

Ft = (2 x Pd) / (m x z3)

where Pd is the diametral pitch, m is the module, and z3 is the number of teeth on wheel 3.

Substituting the given values:

Pd = 25.4 / 5 = 5.08 teeth/inch

z3 = t3 / m = 30 / 5 = 6 teeth

Ft = (2 x 5.08) / (5 x 6) = 0.846 N

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The function is not continuous at x=1, so the answer is A.

At x=1, the two pieces of the function meet. The first piece ends with an open dot at (1,0), meaning that the function is not defined at $x=1$. The second piece starts with a closed dot at (1,-1), meaning that the function is defined at x=1 and takes the value -1 there.

Since the function is not defined at x=1, it cannot be continuous at that point. Therefore, the function is not continuous overall.

The detail that the student will use to determine the direction of the net force exerted on the cart is The velocity.

When examining the velocity-time graph of a cart during time intervals A to B, it is crucial that we analyze it to determine both the net force's direction and the change in momentum's direction.

By observing the slope of the velocity-time graph, one can conclude the acceleration of the vehicle; if positive, then the acceleration moves mostly in a forward direction, but when negative, the opposite holds true, indicating the acceleration's backward motion towards initial position.

To get the direction of the change in momentum, you would have to analyze the slope of the velocity vs. time graph at the various time intervals.

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In the diagram, continental crust is labeled 1 and oceanic crust is labeled 2.

option A.

Continental crust:

Oceanic crust:

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Blood typing is a process that determines the type of antigens and antibodies present on the surface of red blood cells.

There are four major blood types: A, B, AB, and O. Each blood type is characterized by the presence or absence of certain antigens and antibodies. For example, type A blood has A antigens on the surface of red blood cells and B antibodies in the plasma, while type B blood has B antigens on the surface of red blood cells and A antibodies in the plasma.

Blood transfusions are medical procedures in which blood or blood products are transferred from one person to another. Blood transfusions can be life-saving in situations where a person has lost a significant amount of blood due to injury or surgery, or has a medical condition that affects the production or function of their own blood cells. It is important to match the blood type of the donor and the recipient to prevent adverse reactions, such as hemolysis (breakdown of red blood cells) or an immune response.

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The fulcrum should be placed 0.120 m from the left end of the bar to balance the system horizontally.

What is balance?

To balance the system horizontally, the center of gravity (CG) of the bar and the attached masses should be placed directly above the fulcrum. We can find the location of the CG using the following formula:

CG = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3)

where m1, m2, and m3 are the masses of the bar, the 0.055 kg mass, and the 0.110 kg mass, respectively, and x1, x2, and x3 are their respective distances from the left end of the bar.

We know that the total mass of the system is:

m = m1 + m2 + m3 = 0.120 kg + 0.055 kg + 0.110 kg = 0.285 kg

Let x be the distance from the left end of the bar to the fulcrum. Then, the distance from the fulcrum to the center of gravity is (L/2 - x), where L is the total length of the bar (90.0 cm). Therefore, we want to find x such that:

CG = (L/2 - x)

Substituting the expressions for the CG and the masses, we get:

(m1x1 + m2x2 + m3x3) / (m1 + m2 + m3) = (L/2 - x)

Simplifying and rearranging, we get:

x = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3) - L/2

We can choose any two points on the bar as reference points, and take their distances as x1 and x3. Let's choose the left end of the bar as x1 = 0, and the right end of the bar as x3 = L = 90.0 cm = 0.900 m. Then, we can find x2, the distance from the left end to the 0.110 kg mass, as:

x2 = L - x1 - x3 = 0.900 m - 0 m - 0.090 m = 0.810 m

Substituting the masses and distances, we get:

x = (m1x1 + m2x2 + m3x3) / (m1 + m2 + m3) - L/2

x = (0 kg × 0 m + 0.055 kg × 0.810 m + 0.110 kg × 0.900 m) / (0.120 kg + 0.055 kg + 0.110 kg) - 0.450 m

x = 0.570 m - 0.450 m

x = 0.120 m

Therefore, the fulcrum should be placed 0.120 m from the left end of the bar to balance the system horizontally.

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The weight of someone on Earth with a mass of 75kg is 750N.

option B.

The weight of someone on Earth is calculated using Newton's second law of motion.

W = mg

where;

For the mass is 75kg and the gravitational field strength on Earth is 10N/kg.

W = 75 kg x 10 N/kg

W = 750 N

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Answer:

N/A

Explanation:

The following formula can be used to compute the power output of a person lifting a lawnmower:

Work (W) / Time (t) = Power (P).

Where:

Work (W) is defined as the force used to lift the lawnmower multiplied by the distance traveled (i.e., work done against gravity).

Time (t) is the amount of time it takes to lift the lawnmower.

To determine the power output, however, we would need to know the force used to lift the lawnmower as well as the distance it was lifted. We won't be able to provide an accurate power output value without this information.

In fact, in the absence of air resistance, the amount of GPE (Gravitational potential energy) energy when the ball is held motionless above the floor equals the amount of KE (Kinetic energy) energy at impact with the floor.

Answer:

zd its c

Explanation:

i know

The resultant x and y components are 53.23 and 41.51, respectively.

What are the components?

To determine the resultant x and y components of the vectors, we can use the following equations:

Rx = ΣFx = F1x + F2x + ...

Ry = ΣFy = F1y + F2y + ...

where F1x, F2x, ... are the x components of the vectors, F1y, F2y, ... are the y components of the vectors, and ΣFx and ΣFy are the total x and y components of the resultant vector, R.

First, we need to find the x and y components of each vector:

Vector 1: magnitude = 26.5, angle = 56°

F1x = 26.5cos(56) = 14.28

F1y = 26.5sin(56) = 21.44

Vector 2: magnitude = 44, angle = 28°

F2x = 44cos(28) = 38.95

F2y = 44sin(28) = 20.07

Now we can add the x and y components of the vectors to find the total x and y components of the resultant vector:

ΣFx = F1x + F2x = 14.28 + 38.95 = 53.23

ΣFy = F1y + F2y = 21.44 + 20.07 = 41.51

Therefore, the resultant x and y components are 53.23 and 41.51, respectively.

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As long as the current is steady, a solenoid's magnetic field will become stronger as the number of loops increases.

An electromagnet's strength can be increased by increasing the current or voltage as well as the quantity of wire loops encircling the iron core.

It follows that increasing the number of turns or the current flow (by raising the voltage because I = V/R) will produce a stronger magnetic field for a given coil length. Therefore, a coil with N of 1000 turns would generate a stronger magnetic field than one with N of only 100 turns.

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The distance the airplane will travel in 30 minutes, given that the airplane travels at 1624 miles per hour is 812 miles

The following data were obtained from the question:

Speed is defined as distance travelled per unit time.

Speed = Distance travelled / time

Inputting the various parameters, we can obtain the distance travelled as follow:

1624 = Distance travelled / 0.5

Cross multiply

Distance travelled = 1624 × 0.5

Distance travelled = 812 miles

Thus, we can conclude that the distance travelled by the airplane in 30 minutes is 812 miles

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Answer:

Pure water increases in volume when heated due to the phenomenon of thermal expansion. When water is heated, the kinetic energy of its molecules increases, causing them to move faster and spread out. This increased molecular movement leads to an increase in the average distance between water molecules, resulting in an expansion of the water.

Explanation:

.......

Answer:

Sound travels faster in liquids than in gases because molecules are more tightly packed. In fresh water, sound waves travel at 1,482 meters per second (about 3,315 mph). That's well over 4 times faster than in air!

Explanation:

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