to skiers are headed downhill along a very icy part of the Health one person is moving at 10m/s and has a mass of 50 kg  and the other is moving at 6 m/s what the mass of 100 kg they smashed into each other and hold onto each other when they collide what is stop in their tracks explain

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Which model displays the change in a gas when the temperature of the gaseous system decreases?

1. do the particles in the medium material move in the same direction of the wave or at opposite direction to the wave? explain your answer. 2. by inputting more energy into the wave, i.e a large shake of the spring, which wave property also increases? 3. are there forces of friction acting while a wave is passing through a medium?