How much heat is needed to change 115 g of water at 100 degrees * C to steam at 100 degrees * C ?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

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.

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?