Physics, 04.08.2019 10:50 nevaehkirk1997
A8.1 kg shell is fired horizontally from a 1250 kg cannon with a velocity of 220m/s. find the recoil velocity of the cannon.
Answers: 1
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Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?
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A8.1 kg shell is fired horizontally from a 1250 kg cannon with a velocity of 220m/s. find the recoil...
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