True or false: it is legal for a goalie to jump forward or come off his line during a penalty kick

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?