Acar of mass m traveling at speed v crashes into the rear of a truck of mass 2m that is at rest and in neutral at an intersection. if the collision is perfectly inelastic, what is the speed of the combined car and truck after the collision?

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f