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(Potential Energy and Conservation of Energy) A bi y list oasts down a 6.0? hill at a steady speed of 4.0 m/s. Assuming a total mass of 75 kg (bi y le plus rider), what must be the y list's power output to limb the same hill at the same speed?
On a hot summer day air temperatures may rise to 40 ?C. By what percentage will the viscosity of this air change relative to room temperature?
Two forces are applied to a door knob, perpendicular to the door. The first force is twice as large as the second force. Find the ratio of the torque of the first to the torque of the second
Two parallel plates are held at potentials of +229V and ?59V, An electron is initially placed halfway between the plates, Find its kinetic energy when it hits the positive plate
If the car's speed is the instrument indicates that the wind is directed towards the north-east. Determine the speed and direction of the wind.
The peak value of an alternating current in a 1480 W device is 4.4 A. What is the rms voltage across it
What change in gravitational potential energy occurred while the force acted on the mass?
How far apart are they when lighter astronaut has move.
During a physics experiment, helium gas is cooled to a temperature of 20.0 K at a pressure of 0.150 atm, What are the mean free path in the gas
A 10 kilogram mass hangs on a rope wrapped around a freely rotating 2 kilogram cylinder of radius 10 centimeter. Find the accelerations of both the mass and the cylinder
A lead ball is dropped into a lake from a diving board 9.10 meter above the water. Find with what velocity does ball hit the water surface
If the magnitude of the drift velocity of free electrons in a copper wire is 7.12 10-4 m/s, what is the electric field in the conductor
From what height did the student fall? Assume that the only force acting on him throughout the collision is that as a result of the ground.
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