What form of energy is needed to make photosynthesis happen? A. Proton energy
B. Chemical energ
C. Electron energy
D. Solar energy

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

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

Abowling ball rolls 32 meters in 0.8 seconds what is the average speed in m/s of the bowling ball in m/s