A hydrogen atom that is initially at rest absorbs a photon
A hydrogen atom that is initially at rest absorbs a photon with an energy of 21 eV. What is the momentum of the atom after it absorbs the photon?
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A hydrogen atom that is initially at rest absorbs a photon with an energy of 21 eV. What is the momentum of the atom
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A block of mass M=100 kg is moving down an incline that makes an angle of 30 degrees relative to the horizontal. How much work is done by friction during this process
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