What do these circuits all have in common?
a.
they all contain switches.
b.
they are all ac.
c.
they are all dc.
d.
they all contain resistors.

When you turn on a battery-operated device, an electrical circuit is

What is the most useful equation for electric power?

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.