When electrons move down energy levels, are they gaining or losing energy?

When they move closer to the nucleus, they are said to be losing energy; however, they most likely move up through the shells and gain energy. Also, they are unstable in the new shells, so they usually return to their original shells and expel the extra energy through photons or other means.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

Depending on how the continental plates move it can cause a continental scale shift.