A bowling ball starts on the edge of a desk with 20J of Potential Energy. It rolls off the desk and hits the ground generating 4 J of heat energy and
J of sound energy.

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

In what direction does an applied force move an object