All of the following describe the motion of an object except mass
speed
velocity
acceleration ​

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work