Across-country runner accelerates from 4 m/s to 7 m/s over the course of 5 seconds. what is the runner's average rate of acceleration? a. 0.3 m/s/s b. 0.6 m/s/s c. 1.4 m/s/s d. 2.2 m/s/s

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?