Heart diseases maybe: A symptom of tension/pressure inleft side of ribs/back is more likely a angina occure. Angina is chest pain or discomfort that occurs when the heart is working harder than usual. ...Read more.
The energy that is lost by the coffee and the mug is being transferred to the colder surroundings. We refer to this transfer of energy from the coffee and the mug to the surrounding air and countertop as heat. In this sense, heat is simply the transfer of energy from a hot object to a colder object.
Consider what happens to the water in a pot as it is heated over an open camp stove. The water at the bottom of the pot heats up first. This causes it to expand. Since the warmed water has a lower density than the water around it, it rises up through the cooler, dense water. At the top of the pot, the water cools, increasing its density, which causes it to sink back down to the bottom. This up and down movement eventually heats all of the water.