Which two statements about an electric motor are true? a. it converts motion energy to electric energy. b. it depends on the relative motion of a magnet and a current-carrying wire. c. it depends on a rotating magnet to create a magnetic field. d. it converts electric energy to motion energy. e. it doesn’t require electricity because it uses electromagnetism.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600