Which is an example of the cycling of matter from one sphere to another? A a puddle of water evaporating and rising into the atmosphere
B animals obtaining energy from plants
C heat energy from the sun warming the land
D heat energy from the sun warming the oceans

Anybody wanna ? (picture included? )

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

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.