When light travels from one medium to another(from air to water, for example)it gets bent. this is called which of the following?
a. reflection
b. refraction
c. diffraction
d. polarization

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?