1. i drop a little rock from the top of the tower and it takes 1.65 seconds to hit the ground. calculate the velocity in m/s after 1.10 seconds of freefall and calculate the velocity at impact in mi/hr.

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.