Thursday, December 15, 2011

Can I please have some help with one question?

Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example, continents). Use your knowledge of heat energy, specific heat, and heat transfer to explain these facts.|||Well, in terms of specific heat, water is 4,184 Whereas virtually all common land based elements have specific heats of less than 1,000. This means that water takes ALOT more energy to heat up and cool down than say, a sheet of copper. Because of this great energy requirement, water retains heat much longer than other substances (this is greatly attributed to its molecular structure). While the sun may beat down on a patch of earth, it will raise in temperature fairly quickly. When the sun shines down on land surrounded by water however, the water absorbs the heat, but because it has such a high specific heat, the temperature increase is much less than that of just the plot of earth.





IN terms of heat transfer... The water surrounds the land which means it diffuses (or absorbs) heat energy from gradients of higher to lower concentration in order to equalize the energy. However, because of the sun, clouds, rotation of the earth, and many other factors, this equilibrium is impossible except in small scale controlled experiments.|||will give you a hint, hydrogen has one of the highest specific heat capacity, and water contains hydrogen. Now if you use your noggins, instead of me telling you the answer, you'll appreciate the knowledge of chemistry.

another hint

water is great buffer of change in heat, soooooooo ocean surrounding island dictates air temps. of islands

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