Particles vibrate parallel to the direction the sound travels. It's a longitudinal wave.
An object of large mass is pulled down onto a surface with a greater force than an object of low mass and, as a consequence, there is greater friction between the surface of the heavy object than between the surface and the light object.
Soaking up spilled milk with a paper towel
Answer:
If you are sitting in a chair right now there are two forces acting on you. The first is gravity which is what may make it difficult to stand up . The other is the force of the chair itself pushing up on you.
Explanation:
