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1. On a distant planet small-amplitude waves travel across a 1-m-deep pond with a speed of 5 m/s. Determine the acceleration of gravity on the surface of that planet.
2. The flowrate in a 50-ft-wide, 2-ft-deep river is Q = 190 cfs. Is the flow subcritical or supercritical?
3. The flowrate per unit width in a wide channel is q = 2.3 m2/s. Is the flow subcritical or supercritical if the depth is (a) 0.2 m,
(b) 0.8 m, or
(c) 2.5 m?
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Three resistors, 29, 47, and 77 ?, are connected in series, and a 0.49-A current passes through them. obtain the potential difference across the three resistors
A tuning fork with a frequency of 440 Hz is held above a resonance tube that is partially full with water. Assuming that the speed of sound in air is 342 m/s, for what three smallest heights of the air column will resonance occur?
A 0.347-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
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A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 x 103 J, what is the speed of the skier
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An explosion breaks an object into two pieces, one of which has 1.60 times the mass of the other. If 8000 J were released in the explosion, how much kinetic energy did each piece acquire? Heavier piece
q1. while a roofer is working on a roof that slants at 39.0 degrees above the horizontal he accidentally nudges his
A juggler performs in a room whose ceiling is a height 3.5m above the level of his hands. He throws a ball upward so that it just reaches the ceiling.
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