A Prediction on the Topic of Keeping the Coffee Warm Essay

Prediction I predict that the best way to keep coffee warm is to have asilver insulator because of what we know on radiation and silver being a pooremitter compared to a plain beaker or a black one. I predicted this becausemost saucepans are silver because silver is a poor emitter compared to whiteand black and also silver is shinywhich cuts down heat wasted by radiation.Research After making a cup of coffee it loses heat because of thefollowing factorRadiation Evaporation Conduction ConvectionRadiation The sun radiates heat throughempty space in the form of tiny waves. If you absorb any of the Sunsradiation, it heats you up. This is why it is sometimes called Heat radiation.Everything gives off some heat radiation. The hotter it is the more itradiates. A black area absorbs much more radiation than a white surface. Muchof the radiation that hits a white surface reflects away. A silver surface is apoor absorber and good reflector. An example of radiation is a saucepan. (Asaucepan loses heat with radiation and conduction. Also it loses heat byconvection by air currents rising above the saucepan.)Evaporation Evaporation works in a similar way to conduction. When thebeaker or water is heated the molecules vibrate more at different speeds. Everyso often, one molecule will gain a lot more speed than the others and willescape. When it finally escapes it all its energy with it so less is leftbehind. Now that there is less energy they are cooler. Conduction This is the only method of heat transfer that happens inopaque solids. In the solid the particles are fixed. When heat is added theystart to vibrate one by one banging into their neighbouring particle. This ishow heat energy is passed on from one particle to the next. Good conductors aremetals such as gold, silver and glass. A glass beaker can be safety heated on agauze because a gauze conducts heat away from a flame. ...