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Physics

05/04/23

What is the energy of the air resistance exerted on his parachute?

A parachuter jumped from the top of a building 850 m high with a velocity of 5 m/s. He landed with a velocity pf 2 m/s.

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Physics

05/04/23

At what speed would he arrive at the lower peak?

Two snow covered peaks are at elevations of 862 m and 741 m above the valley between them. If a skier starts from rest on the higher peak and just coasted down without exerting any effort, at what... more

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Physics

05/04/23

How high is it if its velocity is 5 m/s?

A bullet was fired from a gun directly upward. It reached a maximum height of 2 km. What is its velocity when it leaves the gun? How high is it if its velocity is 5 m/s?

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Physics

05/04/23

What is its velocity at a point 12 ft from the top?

A body of mass m Starts down from rest from the top of an inclined plane 20 ft long and 10 ft high. What is its velocity at a point 12 ft from the top?

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Physics

05/04/23

What is the energy of the air resistance exerted on his parachute?

A parachuter jumped from the top of a building 850 m high with a velocity of 5 m/s. He landed with a velocity pf 2 m/s. What is the energy of the air resistance exerted on his parachute?

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Physics

05/04/23

The mean free path is the average distance traveled by a particle between collisions with other particles. Calculate the mean free path 𝜆 of air at room temperature, 𝑇=67.0 ∘F. Air is

The mean free path is the average distance traveled by a particle between collisions with other particles. Calculate the mean free path 𝜆 of air at room temperature, 𝑇=67.0 ∘F. Air is mostly... more

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Physics

05/04/23

What would the pressure 𝑃 of an ideal gas be if the mean free path was 142 cm? Assume that the gas is at room temperature, 𝑇=22.6 ∘C, and that the diameter of the molecule is 𝑑=1.25×10^-10 m.

What would the pressure 𝑃 of an ideal gas be if the mean free path was 142 cm? Assume that the gas is at room temperature, 𝑇=22.6 ∘C, and that the diameter of the molecule is 𝑑=1.25×10^-10 m.

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Physics

05/04/23

Suppose a gas‑filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure (1 atm=1.013×105 Pa) when the bulb has a temperature of 20.0 ∘C. Find the gauge

Suppose a gas‑filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure (1 atm=1.013×105 Pa) when the bulb has a temperature of 20.0 ∘C. Find the... more

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Physics

05/03/23

Find the velocities

Two particles have a position at time t given by the equations S1 = -t^3 -t and S2 = 6t^2 - t^3.Find their velocities when they have the same acceleration.My answer is V1 = 2 and V2 = 9. I'm not... more

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Physics Science

05/03/23

A box is pushed up a frictionless ramp. The box has a mass of 5.6 kg and the pushing force acts in a direction parallel to the ramp.

The ramp is at an angle of 15 degrees with the horizontal. If the acceleration of the box is 2 m/s2 up the ramp, what is magnitude of the pushing force? (Answer in Newtons)

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Physics Science

05/03/23

An angry mascot kicks a giant plastic egg filled with candy.

The egg leaves the mascot's foot with a velocity of 8.4 m/s at an angle of 20 degrees above the horizontal. If you neglect air resistance, how far from the angry mascot will the egg land? Answer in... more

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Physics Science

05/03/23

You are feeling bored and decide to take a walk. You walk 49.4 m at a direction 30 degrees N of W and then 30 m east

What is the magnitude of the vector that describes your position with respect to your starting point. (If the first part of your trip is vector A and the second part is vector B, you are looking... more

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Physics Science

05/02/23

Conservation Question (Look at description for more details; PHYSICS Related)

How much heat (in Joules) is required to melt 0.31 kg of ice at 0oC and to raise the temperature of the melted ice to 15oC? The specific heat of water is 4186 J/(kg K) and the Latent heat of fusion... more

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Physics Science

05/02/23

Conservation Question (Look at description for more details; PHYSICS Related)

How much heat (in Joules) is required to increase the temperature of 2 kg of water from 20oC to 87.0oC? (The specific heat of water is 4186 J/(kg K))

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Physics Science

05/02/23

Conservation Question (Look at description for more details; PHYSICS Related)

A large container of water is open to the air and develops a hole with area 10 cm2 (.001 m2) at a point h below the surface of the water. If the water leaves the hole with a flow rate of 0.0033... more

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Physics

05/02/23

Could you please help with this question

A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.95 m above. The brother's outstretched hand catches the keys 1.75 s later. (Take upward as the... more

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Physics

05/02/23

Please help me solve these problems

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause... more

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Physics

05/01/23

A nichrome wire with a resistance of 12.3 is connected across the terminals of a 3.0 V flashlight battery. How much current is in the wire?

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Physics

05/01/23

A 24.0 g marble sliding to the right at 61.2 cm/s overtakes and collides elastically with a 12.0 g marble moving in the same direction at 15.3 cm/s.

After the collision, the 12.0 g marble moves to the right at 76.5 cm/s. Find the velocity of the 24.0 g marble after the collision.

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Physics

05/01/23

A billiard ball traveling at 4.4 m/s has an elastic head-on collision with a billiard ball of equal mass that is initially at rest. The first ball is at rest after the collision.

What is the speed of the second ball after the collision?

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Physics

05/01/23

If a 0.155 kg baseball has a momentum of p = 4.96 kg·m/s as it is thrown from home to second base, what is its velocity?

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Physics

05/01/23

If a 0.155 kg baseball has a momentum of p = 4.96 kg·m/s as it is thrown from home to second base, what is its velocity?

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Physics

05/01/23

What is the kinetic energy of an automobile with a mass of 1290 kg traveling at a speed of 10.8 m/s?

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Physics

05/01/23

Physics Review Question

A 100 kg satellite is in orbit around the earth at a height of 10,000 km above the ground.how much additional kinetic energy would be required for the satellite to escape from earth completely? IE:... more

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Physics Calculus

05/01/23

Einstein Notation and Vector Practice

Prove the following identity, where i = identity tensor, x is a vector, and r = |x| :Please use Einstein notation to solve this problem. δij is also the identity matrix.(i∇2 -∇∇)r = i/r + xx/r3

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What is the energy of the air resistance exerted on his parachute?

At what speed would he arrive at the lower peak?

How high is it if its velocity is 5 m/s?

What is its velocity at a point 12 ft from the top?

What is the energy of the air resistance exerted on his parachute?

The mean free path is the average distance traveled by a particle between collisions with other particles. Calculate the mean free path 𝜆 of air at room temperature, 𝑇=67.0 ∘F. Air is

What would the pressure 𝑃 of an ideal gas be if the mean free path was 142 cm? Assume that the gas is at room temperature, 𝑇=22.6 ∘C, and that the diameter of the molecule is 𝑑=1.25×10^-10 m.

Suppose a gas‑filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure (1 atm=1.013×105 Pa) when the bulb has a temperature of 20.0 ∘C. Find the gauge

Find the velocities

A box is pushed up a frictionless ramp. The box has a mass of 5.6 kg and the pushing force acts in a direction parallel to the ramp.

An angry mascot kicks a giant plastic egg filled with candy.

You are feeling bored and decide to take a walk. You walk 49.4 m at a direction 30 degrees N of W and then 30 m east

Conservation Question (Look at description for more details; PHYSICS Related)

Conservation Question (Look at description for more details; PHYSICS Related)

Conservation Question (Look at description for more details; PHYSICS Related)

Could you please help with this question

Please help me solve these problems

A nichrome wire with a resistance of 12.3 is connected across the terminals of a 3.0 V flashlight battery. How much current is in the wire?

A 24.0 g marble sliding to the right at 61.2 cm/s overtakes and collides elastically with a 12.0 g marble moving in the same direction at 15.3 cm/s.

A billiard ball traveling at 4.4 m/s has an elastic head-on collision with a billiard ball of equal mass that is initially at rest. The first ball is at rest after the collision.

If a 0.155 kg baseball has a momentum of p = 4.96 kg·m/s as it is thrown from home to second base, what is its velocity?

If a 0.155 kg baseball has a momentum of p = 4.96 kg·m/s as it is thrown from home to second base, what is its velocity?

What is the kinetic energy of an automobile with a mass of 1290 kg traveling at a speed of 10.8 m/s?

Physics Review Question

Einstein Notation and Vector Practice

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