What happens when an electron absorbs energy?

a. the electron moves from a lower energy orbital to a higher energy orbital.
b. the electron falls into the nucleus.
c. the electron moves from a higher energy orbital to a lower energy orbital.
d. the electron loses its charge.

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.