Aperson standing on a horizontal floor is acted upon by two forces: the downward pull of gravity and the upward normal force of the floor. these two forces a. have equal magnitudes and form an action-reaction pair. o b. have equal magnitudes and do not form an ac n pair 0 c. have unequal magnitudes and form an action-reaction pair. 0 d. have unequal magnitudes and do not form an action-reaction pair

Iflow from a warmer object to a cooler object until both objects are the same temperature what am i?

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.