Which term describes a quantity that has both magnitude and direction?

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

The energy equivalent of the rest mass of an electron is

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