If a total of 50 J of work are done on an object, its energy...
A. decreases by 50 J.
B. increases by 50 J.
C. doesn't change.
D. is transferred to another object.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

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

How many neutrons does plutonium -196 with an atomic number of 78.