A ball is thrown straight up and reaches a maximum height in 8.33 s.
What was its initial speed? The accelera-
tion of gravity is 9.8 m/s2
Answer in units of m/s.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.