PLEASE HELP ASAP WILL GIVE BRAINLIEST. The friction force depends on what two factors?

The normal force and distance

density and the spring constant

The coefficient of friction and height

The coefficient of friction and the normal force

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

How to calculate the mass of copper