A 500kg metal rod (A) is lifted to a position at a height of 45m using a ramp. A 2nd 500kg equal metal rod (B) is brought to a position at a height of 45m and lowered by a crane. Which statement is true about their potential energy?

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)

Area around a charged object where the objects can exert a force on another charged objects is an electric