Someone help me, it gets complicated

In a system, when potential energy decreases, then entropy also decreases. true false

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of