Plz hurry it's !
a handball player hit a ball with a mass of 0.25 kg. the ball travels at a velocity of 15 m/s for 0.75 s until it hits the wall.
what was the average acceleration of the handball?
a. 20 m/s² b. 0.05 m/s c. 20m/s d. 0.05 m/s²

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

Which direction does the energy flow in this energy pyramid ?