What is agent object notation? ( for force diagrams. )

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Which lists the organs in the correct order as food passes from the mouth to anus?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.