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A ball is thrown straight up into the air. It starts at height y = 0 with velocity v0, and reaches a maximum height of H. (Define gravitational potential energy to be zero at y = 0, and ignore air resistance). Find at what point along path will ball potential energy equal its kinetic energy?
What is the energy released in this nuclear reaction 47Be + 01n ? 37Li + 11H
a block is moving down a hill at rest with height of h then it go on a loop, with r=0.5, if the block can comeplete this loop. What is the least height of the hill
Two identical point charges are fixed at opposite corners of a square whose sides have a length of A test charge, Determine the speed of the test charge when it reaches the center of the square
A 1200 kg car carrying four 84 kg people travels over a rough washboard dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
An 80-cm-long wire is made by welding a 1.2 mm-diameter, 20-cm-long copper wire to a1.2 mm-diameter, 60-cm-long iron wire. What is theresistance of the composite wire?
As measured in Earth's frame of reference, two planets are 4.25×10^5 km apart. How fast is the ship traveling
You're listening to a loudspeaker with an initial output of 50 watts, and someone turns it up to 100 watts. Will the music sound more than, less than, or exactly twice as loud as before?
A 10kg block of ice is placed in a 0.01m^3 vat of boiling water to cool it. What is the final equilibrium temperature of the water
Starting from rest at point A, you ride your motorcycle north to point B 75.0 m away, increasing speed at a steady rate of 2.00m/s^2. You then gradually turn toward the east along a circular path of radius 50.0 m at constant speed from B to point C, ..
A ball player hits a home run, and the baseball just clears awall 20.6 m high located 131.0 m from home plate. The ball is hit at an angleof 35° to the horizontal, and airresistance is negligible. Assume the ball is hit at a height of1.0 m above t..
A uniform 1.9-kg rod that is 0.78 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
A wireless transmitting microphone is mounted on platform that can roll down an incline, directly away from a loud speaker that is mounted at the top of the incline. Estimate the acceleration of the platform
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