12,762 Answered Questions for the topic physics

Physics

02/08/23

A conducting sphere has a radius of r = 6.2 cm and a net charge of q = 4 𝜇C. What is the electric potential of its surface?
A conducting sphere has a radius of r = 6.2 cm and a net charge of q = 4 𝜇C. What is the electric potential of its surface?
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Physics Mcat

02/08/23

What is the acceleration of a system of two masses (5 kg and 2 kg) connected by a massless cord and hung over a frictionless pulley?
Provide your answer as a multiple of g, where g is the acceleration due to gravity.
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Physics

02/08/23

by what factor will the amplitude of the sound change?
An audio speaker producing a steady sound at an outdoor concert is 36 ft away from you. If you move to a position where the speaker is 74 ft distant, by what factor will the amplitude of the sound... more
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Physics

02/08/23

In a student laboratory exercise, the wavelength of a 68,300 Hz ultrasound wave is measured to be 0.507 cm. Find the air temperature (in K).
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Physics

02/08/23

An empty storage tank has a volume of 4,600 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)
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Physics

02/08/23

A scale reads 342 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water?
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Physics

02/08/23

A 57.6 kg pole-vaulter falls from rest from a height of 5.4 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.34 s after landing on the pad.
(a) Calculate the athlete's velocity just before reaching the pad.ï»ż(b) Calculate the constant force exerted on the pole-vaulter due to the collision
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Physics

02/08/23

Two carts with masses of 4.56 kg and 2.26 kg move toward each other on a frictionless track with speeds of 4.96 m/s and 3.60 m/s respectively.
The carts stick together after colliding head-on. Find the final speed.
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Physics

02/08/23

A 2.0 kg ball strikes a wall with a velocity of 8.6 m/s to the left. The ball bounces off with a velocity of 7.4 m/s to the right.
If the ball is in contact with the wall for 0.22 s, what is the constant force exerted on the ball by the wall?
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Physics Math

02/08/23

An aluminum wing on a passenger jet is 25 m long when its temperature is 19°C. At what temperature would the wing be 3 cm (0.03 m) shorter?
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Physics

02/07/23

Magnitude in Newtons
The mass of a subway car and passengers is 42,800 kg if it's acceleration as it leaves a station is 0.8 m/squared what is the net force in Newtons acting on it
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Physics

02/07/23

Physics questions

A bullet of mass 50.0 g strikes a wooden block of mass 5.0 kg and becomes embedded in the block. The block and bullet then flies off at 10.0 m/s. What was the original velocity of the bullet in... more
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Physics

02/07/23

Physics questions

A bullet of mass 50.0 g strikes a wooden block of mass 5.0 kg and becomes embedded in the block. The block and bullet then flies off at 10.0 m/s. What was the original velocity of the bullet in... more
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Physics

02/07/23

Physics questions

A bullet of mass 50.0 g strikes a wooden block of mass 5.0 kg and becomes embedded in the block. The block and bullet then flies off at 10.0 m/s. What was the original velocity of the bullet in... more
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Physics

02/07/23

Conversion of Energy
A 0.8-kg apple falls from a tree branch that is 2.5 m above the ground. How fast is it moving when it hits the ground, in m / s ? (Round your answer to one decimal place if necessary.)
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Physics

02/07/23

Conversion of Energy
Jared is skateboarding at the park. He is moving at 7 m/s when he begins traveling up a ramp. The combined mass of Jared and the skateboard is 51 kg. How high will he go up the ramp, in m? (Round... more
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Physics

02/07/23

Conversion of Energy

Amy, who has a mass of 68 kg, is riding her bicycle in the country. She is traveling at 11m / s when she begins to coast down a hill. She then coasts up another hill that is 15 m high and comes to... more
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Physics

02/07/23

A 11-kg cannonball is fired with a velocity of 19m / s from 28 m above the ground . It hits a target that is 11 m above the ground . With what velocity does it hit, in m / s

A 11-kg cannonball is fired with a velocity of 19m / s from 28 m above the ground . It hits a target that is 11 m above the ground . With what velocity does it hit, in m / s ? (Round your answer to... more
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Physics

02/05/23

A tennis player places a 40 kg ball machine on a frictionless surface.
The machine fires a 0.057 kg tennis ball horizontally with a velocity of 32 m/s toward the north. What is the final velocity of the machine?
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Physics

02/05/23

Finding Orbital Period and Speed
A GPS (Global Positioning System) satellites orbit at an altitude of 2.9×107 m.Part A: Find the orbital period.Part B: Find the orbital speed of such a satellite.    Express your answer using two... more
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Physics

02/05/23

metal rod 0.150 m long and with a mass of 0.0500 kg is suspended from two thin, flexible wires,At right angles to the rod is a uniform magnetic field of 0.550 T pointing into the page
find the direction and the magnitude of the electric current needed to levitate the rod
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Physics

02/05/23

Question help please
A day on a distant planet observed orbiting a nearby star is 41.9 hr.41.9 hr. Also, a year on the planet lasts 89.7 Earth days.89.7 Earth days. In other words, for the purposes of unit conversion,... more
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Physics

02/05/23

CD Player question help
While placing a compact disc into a CD player, you notice a small chip on its edge. You attempt to play the CD anyway by placing the CD into the player's deck with the chip at 𝜃0=16.5âˆ˜ïżœ0=16.5∘ as... more
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Physics Math

02/05/23

Physics help please
A 9-kg sled sliding freely on an icy surface experiences a 3-N frictional force exerted by the ice and an air-resistive force of 0.6 N. What is the net force acting on the sled?  Links to an... more
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Physics Math

02/05/23

Physics help please
A 5-kg block being pushed across a table by a force P has an acceleration of 6.0 m/s2. What is the net force acting upon the block? If the magnitude of P is 38 N, what is the magnitude of the... more
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