Which statement best defines a motor unit? a. a motor nerve and the muscle cells it stimulates b. a nerve supplying a muscle originating from the spinal cord c. branches located in each individual muscle cell d. single nerves found in each muscle

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

Which of the following list the divisions of the geologic time scale in order from longest to shortest