A force of 800 N is used to stop an object with a mass of 50 kg moving with a velocity of 35 m/s. How long will it take to stop this object? Variables:
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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?