A car drives 500m in 2 minutes. What is the cars speed? A.2m/s B.4m/s C.5 m/s

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

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.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.