A student was walking with a mass of 40 kilograms and an acceleration of 1 m/s/s. What is the force exerted on her? A: 0.025 N
B: 40 N
C: 4 N

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

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.