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.
As this happens, the hotter object cools down, and the cooler object warms up. This is how, say, water in a pot on a stove absorbs heat: the stove heats up the bottom of the pan, and that heat is conducted into the water in the pot. Another form of heat transfer is radiation. You may know that atoms are made of electrons (and other stuff), and that electrons create electric fields.