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| Hail Info: HailStorms Prevention, Information and Photo Galleries of Hail Stones and Storms. Weather Encyclopedia (Site not responding. Last check: 2007-10-20) |
 | | For example, heat is transferred predominantly by conduction through the brick wall of a house, a pan of water on a stove is largely heated by convection, and the Earth receives heat from the Sun almost wholly by radiation. |
 | | This law states that the rate at which heat is conducted through a body per unit cross-sectional area is proportional to the negative of the temperature gradient existing in the body. |
 | | Wien's displacement law, named after the German physicist Wilhelm Wien, is a mathematical expression of this observation and states that the wavelength of maximum energy, expressed in micrometres (millionths of a metre), multiplied by the temperature of the body in kelvins, is equal to a constant, 2,878. |
| www.hailinfo.com /info/h.php3?name=heat_transfer.html (1525 words) |
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