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A fully loaded, slow-moving freight elevator has a cab with a total mass of 1150 kg, which is required to travel upward 49 m in 3.1 min, starting and ending at rest. The elevator's counterweight has a mass of only 1025 kg, and so the elevator motor must help. What average power is required of the force the motor exerts on the cab via the cable?
a narrow charged solid cylinder that is coaxial with a larger charged cylindrical shell. Both are nonconducting, What is the linear charge density of the shell
A sample of dry air has a temperature of 273K, a volume of 4 m^3 and a pressure of 2 atmospheres, Sketch the process on a P-V diagram and mark the final values for pressure and volume after each change, Calculate the total work done.
Just as you had done in your lab, imagine that you have a solid uniform disk (same as a uniform cylinder) with a string wound around its rim. What is the angular acceleration of the disk
A bomb at rest at the origin of an xy-coordinate system explodes into three pieces. Just after the explosion, one piece, of mass m, what is the magnitude of the velocity of the third piece
Can Somone please help me out????A 63.0 m length of insulated copper wire is wound to form a solenoid of radius 2.3 cm. What maximum energy is stored in the inductor
A person whose eyes are 1.75m above the floor stands in front of the plane mirror. The top of her head is 0.11.
A 35 ? lamp and a 90 ? lamp are connected in series and placed across a potential of 40 V. What is the voltage drop across the first lamp
A spring with constant k=15 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. it is then pulled down 6 cm and free. if the ball makes 30 oscillations in 20 seconds, what are its maximum speed.
Two ice skaters are gliding together along the ice, both moving at a constant velocity (sliding without exerting a force). What is the initial speed of the skaters
Imagine that we connect a 10-mH coil to a battery through a resistor, and it settles down to conducting 1.0A. How much energy is now stored in its magnetic field
Estimate how long it will take to heat a cup of soup. What is the net force exerted on the skier.
How long will a radar signal take to complete a round trip between earth and mars when the two planets are 0.7 AU apart.
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