Which statement describes what happens when bret runs up a flight of stairs? his kinetic energy increases. his potential energy decreases. his kinetic energy is converted into potential energy. his potential energy is converted into kinetic energy.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

What is an aquifer for science class

Is a volume of space that is empty of matter.