Aball having a mass of 500 grams is dropped from a height of
9.00 meters. what is its kinetic energy when it hits the ground?
a: 4.4 x 10^3 joules
b: 441 joules
c: 44.1 joules
d: 4.41 joules

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

2) why do satelites not fall while revolving around the earth?

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)