What two factors do you need to know to calculate how much work was done in any situation? fast due in 25 min

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Which situation will produce the greatest change of momentum

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.