Why is a 1 solar-mass red giant more luminous than a 1 solar-mass main sequence star?.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Newton's second law states that f = m x a (force is mass times acceleration). which example would have the greatest acceleration?