What temperature do thermometer show when kept in air?
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A standard mercury thermometer placed outside in the sun measures the temperature of the mercury in the thermometer itself, just as it does when it's not in direct sunlight. The temperature it finally reaches depends on what it is in contact with as well as what radiation falls on it.
This temperature can be very different than the air temperature - a common example is when you measure the temperature on a mountain in direct sunlight and the air is actually very cold and still, but the thermometer reads something close to a comfortable room temperature. If a strong wind were blowing the temperature reading would drop.
That's why weathermen measure temperatures in the shade, rather than in the sun. They are generally interested in the best approximation to the air temperature that can be gotten, and you don't obtain that by putting your thermometer in the sun.
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This temperature can be very different than the air temperature - a common example is when you measure the temperature on a mountain in direct sunlight and the air is actually very cold and still, but the thermometer reads something close to a comfortable room temperature. If a strong wind were blowing the temperature reading would drop.
That's why weathermen measure temperatures in the shade, rather than in the sun. They are generally interested in the best approximation to the air temperature that can be gotten, and you don't obtain that by putting your thermometer in the sun.
....
hope it helps dude...
......... plz mark as brain list
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A standard mercury thermometer show when kept in air.
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