A 70 kg bicycle moving at 10 m/s strikes a stationary 2000 kg car. The bicycle bounces backwards at 2 mls. What is the velocity of the car after impact?

Phase changes are chemical changes. true or false

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.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.