7. how long does it take a ball rolling down a hill to change its speed from 3 m/sec to 34.5 m/sec
if it accelerates at a rate of 3.5 m/sec ? ?

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.