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An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.50 10-11 m. What is EPEfinal - EPEinitial, which is the change in the electric potential energy?
question uncompressed the spring for an automobile suspension is 40cm long. it needs to be fitted into a space 33cm
The power brick for a laptop computer has a power rating of 45 W. What is the rms current in the input coil of the transformer
An engine compresses air down 1/16 its initial volume. The initial pressure is 7.7 X10^6 pa. Find the temperature after compression
An object of mass 0.40 kg, hanging from a spring with a spring constant of 8.0 N/m, What is the magnitude of the acceleration of the object
consider a mass connected to 4 identical springs. each spring has spring constant k and unstretched length l0 and the
A massless spring with spring constant 20 N/m hangs vertically. A body of mass0.15 kg is attached to its free endand then released. Find the amplitude of the resulting motion
a pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. the string
Two cars approaching each other collide and stick together after the collision. What was the initial velocity of the second car
With a 2 meter lever, the fulcrum is 30 cm from the load of 200 pounds. How much "effort" force will be needed to lift it, Which type of lever describes a wheelbarrow
A copper cylinder 1.50m long and 40.0cm in diameter stands onone end. What is the mass of the cylinder? What force does it exert on the ground?
One mole of hydrogen gas at 22 C is compressed through an isobatic process to half its original volume
The suspended 2.82 kg mass on the right is moving up, the 2.2 kg mass slides down the ramp, and the suspended 8.1 kg mass on the left is moving down. There is friction between block and ramp. What is the acceleration of a three block system.
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