What is the approximate mass of a proton?
(1) 1 u
(2) 0.0005 u
(3) 1 g
(4) 0.0005 g

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

The fact that the total amount of energy in a system remains constant is a(n)

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate