To move a heavy couch across a carpeted floor what could be used to decrease the frictional force

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.

Name two kinds of practical electric pumps.

Properties seen when one one substance changes to another are known as properties