A child throws a ball into the air and then catches it when it comes down. What us the effect on the ball's potential energy? A. Potential energy increases, then decreases to the original level.
B. Potential energy decreases, then increases to the original level.
C. Potential energy remains the same throughout the ball's trajectory.
D. The answer cannot be determined from the information provided.

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

it would be c. predictability