Will was riding his bike when a dog ran out in front of him. he slammed on his brakes. during this quick stop, some of the mechanical energy (his motion) was changed into a) heat energy. b) light energy. c) kinetic energy. d) potential energy.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space? the cloud is extremely hot. the cloud is visible primarily because it reflects light from nearby stars. the cloud is cool and lies between you and a hot star. the cloud is cool and very dense, so that you cannot see any objects that lie behind it.