An object having a mass of 2.0 kilograms falls from a height of 15 meters. what is its kinetic energy when it hits the ground?

State the right hand rule of the direction of magnetic field in a conductor carrying current

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

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.