A red billiard ball moving at 4 m/s hits a green one of equal mass which is at rest. If the collision is perfectly elastic, what are the speeds of the red and the green ball after the collision ?

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. 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.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?