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Physics

05/12/23

A 73.0 kg diver steps off a diving board and drops straight down into the water.

The water provides an upward average net force 1390 N. If the diver comes to rest 5.9 m below the water's surface, what is the total distance between the diving board and the diver's stopping point... more

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Physics

05/12/23

A child and sled with a combined mass of 55.0 kg slide down a frictionless hill that is 7.28 m high. If the sled starts from rest, what is its speed at the bottom of the hill?

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Physics

05/12/23

A 1.9 kg ball is attached to a ceiling by a string. The distance from the ceiling to the center of the ball is 0.81 m, and the height of the room is 3.00 m.

(a) What is the gravitational potential energy associated with the ball relative to the ceiling?(b) What is the gravitational potential energy associated with the ball relative to the floor?(c)... more

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Physics Math Chemistry Differential Equations

05/11/23

particle on a ring, quantum mechanics

A)Explain the reason why Ψ(x) = Acos(πx/L) is not able to describe a particle of mass m in a ring of length L. B) On the other hand, explain why Ψ(x) = Acos^2(πx/L) is.C) When momentum is... more

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Physics

05/10/23

In preparing to shoot an arrow, an archer pulls a bowstring back 0.32 m by exerting a force that increases uniformly from 0 to 278 N. What is the equivalent spring constant of the bow?

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Physics

05/10/23

A football punter accelerates a 0.43 kg football from rest to a speed of 8.5 m/s in 0.30 s, what constant force does the punter exert on the ball?

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Physics

05/09/23

A small object begins a free‑fall from a height of 25.0 m. After 1.30 s, a second small object is launched vertically upward from the ground with an initial velocity of 38.0 m/s. At what height ℎ abo

A small object begins a free‑fall from a height of 25.0 m. After 1.30 s, a second small object is launched vertically upward from the ground with an initial velocity of 38.0 m/s.At what... more

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Physics

05/09/23

How to solve the problem?

A potentiometer is a variable resistor that can be adjusted given the needs of the application. For a 24-volt circuit compute the resistance that should be set to obtain the following current... more

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Physics

05/08/23

You are standing 18 m in front of a flat mirror. How far behind is your image?

What is the magnification of your image?

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Physics

05/08/23

What is the wavelength for an FM radio signal if the number on the dial reads 95.6 MHz?

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Physics

05/08/23

What are the first three harmonics of a note produced on a 30.2 cm long string if waves on this string have a speed of 273.4 m/s?

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Physics

05/08/23

Two violin players tuning their instruments together hear 65 beats in 2 s. What is the frequency difference between the violins?

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Physics

05/08/23

Two carts with masses of 4.50 kg and 2.66 kg move toward each other on a frictionless track with speeds of 4.98 m/s and 3.24 m/s respectively.

The carts stick together after colliding head-on. Find the final speed.

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Physics

05/08/23

A football punter accelerates a 0.43 kg football from rest to a speed of 8.5 m/s in 0.30 s, what constant force does the punter exert on the ball?

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Answers •1

Physics

05/08/23

A plane designed for vertical takeoff has a mass of 8.1 ✕ 103 kg.

Find the net work done by all forces on the plane as it accelerates upward at 11.5 m/s2 through a distance of 28.8 m after starting from rest.

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Physics

05/08/23

Question from Linear Kinetics

A billiard player wishes to place his ball as close as possible to a pocket without falling into it. The two balls have a mass of 165 g each. The deceleration of the ball on the table is 0.1 m/s2,... more

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Physics

05/08/23

Question from Linear Kinetics

A snowboarder takes speed downhill in order to get up a hill with an 8% incline without pushing. The kinetic friction coefficient between snowboard and snow = 0.10 and air resistance can be... more

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Physics

05/07/23

How do I solve the problem?

The resistance of an electric heater is 55 Ω when connected to 120 V. How much energy does it use during 25 min of operation?

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Physics

05/07/23

Find the net rate of radiation 𝐻net by a pot at 34.9 ∘C that has been placed in a −19.5 ∘C freezer. The pot's surface area is 0.107 m2 and its emissivity is 0.569.

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Physics

05/07/23

whats the difference between the projection of a vector on another vector and vector along direction of another vector?

thankyou

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Physics

05/06/23

A neutron in a nuclear reactor makes an elastic, head-on collision with the nucleus of a carbon atom initially at rest.

A neutron in a nuclear reactor makes an elastic, head-on collision with the nucleus of a carbon atom initially at rest.(a) What fraction of the neutron's kinetic energy is transferred to the carbon... more

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Physics

05/05/23

how many photons

A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 596 nm, while the power is 2.1 W. During surgery, the laser beam is turned on for 0.055... more

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Physics

05/05/23

radioactive activity

A device used in radiation therapy for cancer contains 0.79 g of cobalt-60 (59.933 819 u). The half-life of this isotope is 5.27 yr. Determine the activity (in Bq) of the radioactive material.

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Physics

05/05/23

Please help me with this question

A speedboat increases its speed uniformly from vi = 20.0 m/s to vf = 33.0 m/s in a distance of Δx = 2.00 ✕ 102 m. (b) For the given information, what single equation is most appropriate for... more

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Physics

05/05/23

Please help me solve this question

A record of travel along a straight path is as follows:1. Start from rest with constant acceleration of 2.00 m/s2 for 19.0 s.2. Maintain a constant velocity for the next 2.30 min.3. Apply a... more

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A 73.0 kg diver steps off a diving board and drops straight down into the water.

A child and sled with a combined mass of 55.0 kg slide down a frictionless hill that is 7.28 m high. If the sled starts from rest, what is its speed at the bottom of the hill?

A 1.9 kg ball is attached to a ceiling by a string. The distance from the ceiling to the center of the ball is 0.81 m, and the height of the room is 3.00 m.

particle on a ring, quantum mechanics

In preparing to shoot an arrow, an archer pulls a bowstring back 0.32 m by exerting a force that increases uniformly from 0 to 278 N. What is the equivalent spring constant of the bow?

A football punter accelerates a 0.43 kg football from rest to a speed of 8.5 m/s in 0.30 s, what constant force does the punter exert on the ball?

A small object begins a free‑fall from a height of 25.0 m. After 1.30 s, a second small object is launched vertically upward from the ground with an initial velocity of 38.0 m/s. At what height ℎ abo

How to solve the problem?

You are standing 18 m in front of a flat mirror. How far behind is your image?

What is the wavelength for an FM radio signal if the number on the dial reads 95.6 MHz?

What are the first three harmonics of a note produced on a 30.2 cm long string if waves on this string have a speed of 273.4 m/s?

Two violin players tuning their instruments together hear 65 beats in 2 s. What is the frequency difference between the violins?

Two carts with masses of 4.50 kg and 2.66 kg move toward each other on a frictionless track with speeds of 4.98 m/s and 3.24 m/s respectively.

A football punter accelerates a 0.43 kg football from rest to a speed of 8.5 m/s in 0.30 s, what constant force does the punter exert on the ball?

A plane designed for vertical takeoff has a mass of 8.1 ✕ 103 kg.

Question from Linear Kinetics

Question from Linear Kinetics

How do I solve the problem?

Find the net rate of radiation 𝐻net by a pot at 34.9 ∘C that has been placed in a −19.5 ∘C freezer. The pot's surface area is 0.107 m2 and its emissivity is 0.569.

whats the difference between the projection of a vector on another vector and vector along direction of another vector?

A neutron in a nuclear reactor makes an elastic, head-on collision with the nucleus of a carbon atom initially at rest.

how many photons

radioactive activity

Please help me with this question

Please help me solve this question

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