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A horizontal 810-Newton merry-go-round of radius 1.70 meter is started from rest by a constant horizontal force of 50 Newton applied tangentially to the merry-go-round. Estimate the kinetic energy of the merry-go-round after 5.0 second. (Assume it is a solid cylinder.)
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You discover a planet orbiting a distant star that has roughly the same mass as the Sun. What is its orbital distance
Your boss at the Cut-Rate Cuckoo Clock Company asks you whatwould happen to the frequency of the angular SHM of the balancewheel if it had the same density and the same coil spring, By what factor would the frequency change
say the electrical company needs to step down the voltage from 7200v rms in the power line behind your house to the
Two rockets are approaching each other on a head on collision course each is moving at velocity 0.8 relative to an independent observer midway between the two with what velocity does on rocket observe the approach of the other
A Carnot engine does work of 150 J per cycle. The engine operates between two reservoirs at 20 degree C and 500 degree C. How much energy is lost per cycle in its exhaust
a man stands on the roof of a 13.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible. The only resistance is from the moving rod, which is The rod has a cross-sectional area of m2 and moves with a..
A boat takes 3.2 hours to travel 28.01 km down a river, then 5.5hours to return. How fast is the river flowing
You throw a baseball straight upward. If air resistance is notneglected, how does the time required for the ball to go from theheight at which it was thrown to its maximum height back down tothe height from which it was thrown? Explain your answer..
What is the angular velocity in rad/s . What is the least pressure obtained inside the bottle? What will happen when this pressure is reached.
two children 50.0 kg each sit on opposite ends of a narrow board with length of 4.60 m and mass of 40.0 kg which can be
Consider a three dimensional rectangular infinite potential well with sides of length L, 2L and 3L. What is the energy of the first excited state relative to the energy of the ground state
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