CAn SoMeOnE hElp MeH?

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.

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?

Estimate of the number of stars in our galaxy