During batting practice, the ballplayer swings his bat with a velocity of 14 m/s. if the bat is 0.65m long, what is the centripetal acceleration at the end of the bat? (ignore the length of the ballplayer's arm)

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

Avalue that describes how heavy an object is and is related to the force of gravity is

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.