What does an increase in the temperature of air indicate? A) The air has less thermal energy. B) The air has more thermal energy. C) The air particles have slowed down. D) The air particles have sped up.

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.