As an electron approaches a proton, what happens to the electric force of attraction between them?
Decreases
Increases
Remains the same
It ceases to exist

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

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.

In which of these cases are the two wave points considered to be in phase with each other?