Ashell is fired with a horizontal velocity in the positive x direction from the top of an 80-m high cliff. the shell strikes the ground 1330 m from the base of the cliff. the drawing is not to scale.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

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.