Real-life applications and examples.

Back to main heat and temperature page

Thermos: The shiny inside reflects radiant energy back into the fluid. It also prevents heat from entering the thermos from outside. The vacuum space prevents conduction and convection from occurring. Since heat cannot easily leave or enter the thermos, fluids retain their original temperature.

Cold mountain air: The air temperature on the top of a mountain is less because the pressure is less. Think about it. Since you are high up, there is less air above you.

Mountain height: There is a limit to how high mountains can be! Bigger mountains exert huge pressures on the rock under it. Huge pressures translate into huge temperatures that will result in melting the rock; the mountain will sink as its base begins to melt.

Evaporation removes heat. Sweating takes away 585 calories per gram. In Death Valley, California, the temperature often exceeds 100 degrees Fahrenheit. However, it doesn't feel that hot because the evaporation of sweat takes away a lot of heat. Here in Connecticut, where it is often hot and HUMID, evaporation of sweat is more difficult. Thus the heat stays in your body and you feel very HOT. Yuck.

Humidifiers make one feel warmer in the winter. Remember that evaporation of your sweat takes away 585 calories per gram, making you feel cool. Putting moisture in the air prevents sweat from leaving your body and you feel warmer because your heat cannot leave.


Back to main heat and temperature page