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Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?
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Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?
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