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The dew point of air is the temperature at which the air will become saturated. Saturation describes the condition of the air when it contains the maximum possible amount of water vapor. Relative humidity describes the percentage of the maximum possible water vapor content that the air holds at a given time (For example, the air may be able to hold 10 g/m3 of water vapor at a given temperature. It it contains 3 g/m3, it contains 30% of the maximum, so its relative humidity is 30%). When air reaches its dew point, it has become saturated. This means that the air now holds the maximum amount of water vapor possible -- 100% of the maximum. Therefore, relative humidity at the dew point is always 100%.

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โˆ™ 2011-10-13 18:18:07
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Aniyah Carroll

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Q: What is the relative humidity of air at its dew point?
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How can relative humidity and dew point be used to predict the weather?

Dew point is the temperature when (invisible) water vapor in the air starts to condense. Relative humidity is the amount of water in the air. If someone knows the relative humidity, they can compare it to the dew point and figure out how wet it will be or if it will rain.


What is the relative humidity when the air is at its dew point?

100%


As an air mass cools to its dew point?

relative humidity increases.


What is the difference between relative humidity and dew point temperature?

relative humidity is the AMOUNT of water in the air. Dew Point is the TEMPERATURE at which the water vapor in the air is turned into liquid water.


What is the relative humidity air that has reached its dew point?

100%


What is the relative humidity when the air temperature is at its dew point?

It is 100%.


What happens to the relative humidity of the air when the air temperature and dew point temperature increase?

the relative humidity goes up cause the air is dry


What is the relative humidity when the air temperature drops to the dew point?

100 %


Why is dew point never the same?

The dew point is the temperature at which a given parcel of humid air must be cooled, at constant barometric pressure, for water vapor to condense into water. The condensed water is called dew. The dew point is a saturation temperature.The dew point is associated with relative humidity. A high relative-humidity indicates that the dew point is closer to the current air temperature. Relative humidity of 100% indicates the dew point is equal to the current temperature and the air is maximally saturated with water. When the dew point remains constant and temperature increases, relative humidity will decreaseTherefore, by the above stated reasons (of humidity and barometric pressure and saturation based on temperature) are all reasons the point at wick dew forms is not the same because the regions them selves vary and thus these relative factors maybe dissimilar.


What happens when air reaches its dew point?

relative humidity is 100 percent.


What happens when air mass cools to its dew point?

Relative humidity increases


Why is cold polar air described as dry when the relative humidity of that air is very high?

The polar air has a high relative humidity due to the temperature of the polar region being close to the dew point temperature. The closer the dew point temperature is to the surrounding temperature, the higher is the relative humidity. The air in the polar region is considered dry as the dew point temperature is low. Low dew point indicates low water vapor content. So since the dew point in the north pole is low, it has a low water vapor content in the air, resulting in it being dry.


What are the two different degrease in humidity called?

I know there is relative humidity (the amount of moisture in the air) and dew point (the temperature in which dew is formed) they both fit in with humidity.


What is the relative humidity when the air temperature is at dew point?

When the air temperature reaches the dew point, water droplets that are in the air become visible. This is how you would get fog. Relative Humidity goes soaring to near 100%.


Why polar air described as dry when the relative humidity of that air is very high?

Temperature of polar is such low and much closer to the dew point, so the relative humidity is high. But low dew point let little water vapor be hold by the air, so it is dry.


Why is the cold air described as dry when the relative humidity of that air is very high?

Temperature of polar is such low and much closer to the dew point, so the relative humidity is high. But low dew point let little water vapor be hold by the air, so it is dry.


Does transpiration effect dew on grass?

Absolutely. Air which is close to the ground cools overnight. While the air is cooling, the relative humidity is increasing until it reaches the dew point and water is released. Transpiration can also cause the dew point to be reached by increasing the relative humidity. This is why there is much more dew on the grass than on pavement.


What is the dew-point when the dry bulb temperature is 20C and the relative humidity is 17?

at 17% relative humidity the dew point is -5.8C at a dry bulb of 20C


What is the dew point and what happens when it falls below the dew point?

The Dew Point is the temperature at which the air is at 100% Relative Humidity. If the temperature fall below the Dew Point, then there is more moisture in the air than it can hold, and water condenses in the form of dew, mist, rain, etc.


What happens to relative humidity as the air temperature drops below the dew point?

It stays at 100%.


What happened to relative humidity as the air temperature drop below the dew point?

It stays at 100%.


When the relative humidity is 100 percent the air temperature is equal to the dew point temperature?

Yes.


How is dew point measured?

Dew point is measured by measuring relative humidity. When the humidity has been determined, a series of mathematical equations is used to figure out the dew point.


What happens when air has reached its dew point?

condensation Another question that follows: As an air mass cools to its dew point; relative humidity increases


What temperature is swamp cooler air?

It is a function of the "dew point" of the air at any given moment. If relative humidity is high, the dew point will also be high and the swamp cooler air will be relatively warm. If relative humidity is low, the dew point will also be low and the swamp cooler air will be relatively cold. A swamp cooler in Phx AZ will put out air about 30 degrees less than the outside air, and works more efficiently when the humidity outside is very low.