Two students run up a flight of stairs. Student X's mass is the same as student Y's mass. Student X takes more time than student Y to run up the stairs. Which of the following
statements describes the power used and work done by the students to run up the stairs?

What is the mass of the same rock on the earth

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

What is the coefficient of kinetic friction μk between the block and the tabletop?