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You throw a 1 kg rock down a 5m-deep wishing well. It hits the water with a velocity of 7.5 m/s. How much work did air resistance do? Express your answer as a negative number of Joules.
A gamma-ray photon produces an electron and a positron, each with a kinetic energy of 259keV, Determine the energy of the photon
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to the spring and allowed to come to rest. It is then pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57.0 ..
They then turn together around the spindle with their centers superposed. What is an angular frequency in of the combination.
An electron starts from rest 32.5 cm from a fixed point charge with Q=-0.125 µC. How fast will the electron be moving when it is very far away
Charges of -11.5 nC and -22.1 nC are separated by 0.733 m. What is the potential midway between the two charges?
When its 75kW engine is generating full power, a small single engine airplane with a mass of 700 kg gains altitude at a rate of 2.5 m/s. what fraction of the engine power is being used to make the air plane climb.
Multiple-Concept Example 6 provides a review of the concepts that play roles here. What are the input heat and rejected heat
Brutus, a champion weightlifter, raises 240 kg of weights a distance of 2.70 m. How much work is done by Brutus lifting the weights
A futuristic design for a car is to have a large disk -like flywheel within the car storing kinetic energy. find the maximum attainable speed of the car
assume the film show in the figure has an index of refraction of 1.36 and is surrounded by air on both sides.
Water flows at 0.25{\rm L}/{\rm s} through a 12-m-long garden hose 2.0{\rm cm} in diameter that is lying flat on the ground. find the gauge pressure of the water where it enters the hose
The middle C string on a piano is under a tension of 977 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
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