Calculate the momentum of a 4.0 kg object traveling at a velocity of 12.0 m/s east

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.

Which of these metals are magnetic?

If you divide a speed in miles per minute by 60, you get the same speed expressed in miles