aansi wants energy on a sound wave to be carried more quickly through a metal medium. which could she do?

Which type of wave can travel without a medium

You can decrease the resistance of a length of wire by

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.