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A repairman , working at the top of an elevator shaft, 60 meter above the elevator car, is startled by the sound of the elevator starting upward and drops his wrench. If the elevator car accelerates upward at 0.10 for 3 second and then runs at constant speed, obtain how far does the wrench fall before striking the elevator car?
An airtight box having a lid with an area of 13.9 in2 ( 89.68 cm2 ) is partially evacuated. what is the air pressure in the box
Air conditioners operate on the same principle as refrigerators. Consider an air conditioner that has 7.00 of refrigerant flowing during its circuit each cycle. The refrigerant enters the evaporator coils in phase equilibrium, with 54.0 of its mass a..
A conducting cubic box has all faces at zero potential. Side of the box has length a. The box is filled with a total charge Q distributed unifomly inside the box. Find the potential at points inside the box
A 3.0-kg wheel in the form of a solid disk rolls along a horizontal surface with a speed of 5.0 m/s. What is the total kinetic energy of the wheel
a block of mass m collides elastically with a block of mass m. before the collision m is moving with velocity vx v and
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric field at the center of the square array of charges
gravity affects any object that has mass. does gravity affect light rays? a beam of light emitted from a distant star
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
A closely wound rectangular coil of 80 turns has dimensions 25 rm cm by 40 rm cm. The plane of the coil is rotated from a position in which it makes an angle of 37 degrees with a magnetic field of 1.10 rm T to a position perpendicular to the field..
Assume charge builds up on the cloud and on the ground until a uniform electric field of 4.00 multiplied by 106 N/C throughout the space between them makes the air break down, What is the maximum charge the cloud can hold
oxygen gas initially at 300 k and 100 kpa is contained in a rigid tank. two alternative processes are to be considered
a 46 v battery is connected in series with a resistance of 5.7 o and an inductance of 3.2 h. find the energy stored
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