#1: if an electron gains energy, what may happen to it?

a. it may move to a higher energy level.

b. it may drop to a lower energy level.

c. it will never change location

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?