Search form. Recovery after Bariatric Surgery. Most people recover very quickly after weight loss surgery and feel ready to go back to normal activities after a few days. It is important to remember though that you have had a major operation and to take it steady for a few weeks.
A rock on top of a mountain contains POTENTIAL ENERGY. The reason for this is that potential energy means that it has the potential to become another form of energy, like kinetic. If a rock is sitting on a mountain, it's not moving. Once it moves, it has KINETIC ENERGY. For example; I'm sitting on top of a mountain.
Formed deep underground over thousands of years of heat and pressure, coal is a carbon-rich black rock that releases energy when burned. In the United States, roughly 30 percent of all electricity comes from coal: the rest comes from natural gas, nuclear, and renewables like wind and solar. Most US coal comes from either above-ground mines in Wyoming and Montana, or underground mines in Appalachia.