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Question1
A dock worker loading crates on a ship finds that a 22 kg crate, at first at rest on a horizontal surface, requires a 69 N horizontal force to set it in motion. Though, after the crate is in motion, a horizontal force of 46 N is required to keep it moving with constant speed.The acceleration of gravity is 9.8 m/s2. Find out the coefficient of static friction between crate and floor and discover coefficient of kinetic friction.
Question2
A friend of yours is loudly singing a single note at 380Hz while racing toward you at 26.2m/s on a day when speed of sound is 339Hz. What frequency do you listen to? What frequency does your friend hear if you suddenly begin singing at 380Hz?
Question3
An FCC film is deposited on (100) plane of a single-crystal FCC substrate. It is determined that an angle between [100] directions in the film and substrate is 63.4°. What are Miller indices of the plane dishonest in the film surface?
A sprinter explodes out of the starting block with an acceleration of +3.9 m/s2, What is her velocity at the end of the race
An object initially at rest explodes in two fragments of masses 2.6 kg and 3.3 kg that move in diametrically opposite directions. find the internal energy of the explosion
Calculate the direction of the average force on the ball during the contact . The magnitude of the average force is 4700N
A(n) 84 g arrow is fired from a bow whose string exerts an average force of 110N on the arrow over a distance of 80cm. What is the speed of the arrow as it leaves the bow.
A light stick with two masses attached to it is spinning about its center at 5 revolutions per minute. The length of the stick is 2.5 meters and the masses are 1.5 kg each.
Consider the concentric metal sphere and spherical shells. The innermost is a solid sphere that has a radius R1. A spherical shell surrounds the sphere and has an inner radius R2 and an outer radius R3.
If a certain mass of water falls a distance of 854 m and all the energy is effective in heating the water, what will be the temperature rise of the water
A particle moves along the curve y=cos(x) from x=0 to x=?/2 under the action of the force F=(3xN)i+(4yN)j. Determine the work done by the force on the particle
An underwater scuba diver sees the Sun at an apparent angle of 45.0° above the horizon. What is the actual elevation angle of the Sun
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
Cowboy Joe wishes to shoot his assailant by ricocheting a bullet off the mirrored metal plate. To do so, should he simply aim at the mirrored image of his assailant.
During an adiabatic process, the temperature of 3.62mol of a monatomic ideal gas drops from 460C to 215C a) Find the work done by the gas. b)Find the heat the gas exchanges with its surroundings. c)Find the change in its internal energy.
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