5. Calculate the speed of a 5 kg object that possesses 260 J of kinetic energy. 6. Calculate the potential energy of a 7 kg object positioned 50 m above the ground.

7. Calculate the height of a 10 kg object that has 780 J of potential

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

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.

Explain why electric current cannot exist if a current doesn't have a voltage source.