What are the differences between concave and convex lenses and mirrors?

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?