what is the diffrence between wet bult and dry bulb?

Answer 1

Lets see...a wet "bult" is a lot larger than a dry "bulb" for starters. Hope this helps.

Answer 2

A Wet Bult is a large, relatively unknown mammal that spends its time standing in the rain. It is usually found in remote parts of tropical Africa and feeds on seedy potatoes and whatever uncaring tourists throw at it. It is about the size of an Ox and suffers from delusions of grandeur. It is a popular attraction on safaris and can outfight only a meercat. This is why it is endangered. An enemy of the dung-beetle, the Wet Bult has a strange mating ritual. It crawls on its stomach towards the dung beetle and attempts to fight the small insect. 9 times out of ten, it loses. This is not such a problem as the majority of Wet Bults are homosexual.

What the hell is a "bulb"?

Answer 3

Both definitions hark back to when temperatures were taken with mercury thermometers.
A mercury thermometer is a closed tube with a bulb containing mercury at one end. When the mercury is heated it expands into the tube, which is marked with graduations that tell you how much the mercury has expanded. The amount of expansion is directly dependent on how hot the mercury is, so the graduations can be marked with degrees. The whole device is a highly accurate, reliable, simple, and robust device for reading temperature.

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Good!

Evaporate cooling is how water removes heat from an object. The energy (heat) of an object is used to turn water into vapor.
This energy is thus removed from the object, cooling it. It's what your body does when it perspires. The sweat dries and as it does, cools you down. The rate of evaporation depends on many factors, including the amount of moisture already in the air, which is known as the humidity index. On days with a high humidity index, you don't dry off (cool off) as fast as on dry days.

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A dry bulb reading is a temperature reading taken with a basic thermometer.
A wet bulb reading is taken with the bulb moistened so evaporate cooling will cool it.
By comparing the difference of the two readings, you can calculate the humidity index.