Why does a rock not visibly vibrate?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.