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Consider a person climbing and descending stairs. Construct a problem in which you calculate the long-term rate at which stairs can be climbed considering the mass of the person, his ability to generate power with his legs, and the height of a single stair step. Also consider why the same person can descend stairs at a faster rate for a nearly unlimited time in spite of the fact that very similar forces are exerted going down as going up. (This points to a fundamentally different process for descending versus climbing stairs.)
A step up transformer is used on a 110 Volt line and supplies a load with 2.0 A. Calculate the secondary voltage, the primary current, and the power output
A satellite has a mass of 7930 kg and is in a circular orbit9.88x106 m above the surface of a planet. The periodof the orbit is 16.1 hours. The radius of the planet is 3.16x106 m. What is the true weight of the satellite when itis at rest on the plan..
Consider the possibility of a new design for an electric train. The engine is driven by the force on a conducting axle due to the vertical component of Earth's magnetic field. Determine how much power would be lost for each ohm of resistance in the..
The greatest height reported for a jump into an airbag is 99.4 m by stuntman Dan Koko. In 1948 he jumped from rest from the top of the Vegas World Hotel and Casino. determine how fast he would have been traveling on impact had air resistance been a..
question how many moles of gas are there in a gas-filled balloon which has a volume of 67.0 l at a pressure of 742 mmhg
The top of the pool table is 0.810 m from the floor. The placement of the tape is such that 0 m aligns to the edge of the table, At what speed did his pool ball hit the ground
an elevator is moving upward at a constant speed of 2.50 ms. a bolt in the elevator ceiling 3.00 m above the elevator
A 0.5 meter diameter bicycle wheel is initially rotating at 60RPM rolls to rest at a constant rate in 10 seconds. What is its initial angular speed in radians per second
Four charged particles are at the corners of a square of side. (Let A = 3, B = 4, and C = 5.) (a) Determine the electric field at the location of charge q.
approximately 10 6 kg of water drops 50m over niagara falls every second. how much potential energy is lost every
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 9.0nC
A radio receiver can detect signals with electric field amplitudes as small as 210?V/m. What is the intensity of the smallest detectable signal
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