Humidity, Relative Humidity, and Dew Point

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What would the relative humidity be if the wet bulb thermometer and the dry bulb thermometer were reading the same?

100%

Why are wet bulb thermometer readings lower than dry bulb readings

Because when the water evaporates it becomes colder

How do you find the wet bulb depression?

Dry bulb temperature - wet bulb temperature

What happens when air reaches it's dew point temperature?

It is over saturated and condensation occurs

What is humidity?

The measure of the amount of water vapor in the air

The layer of the Atmosphere which most of the water vapor is found

Troposphere

What can condensation form?

dew, frost, fog, and clouds

when air temperature rises and dew point stays the same what happens to the relative humidity?

it drops

What happens to the relative humidity as the wet bulb and the dry bulb temperatures become closer together?

it increases

When dew point temperature rises and the air temperature stays the same what happens to the relative humidity?

it rises

What is relative humidity?

the amount of water in the air compared to how much water the air can hold (percentage)

What is Dew Point?

the temperature at which more condensation occurs than evaporation in air.

What is the relationship between the temperature and the amount of water vapor it can hold?

the warmer the air the more water it can hold

If the relative humidity is 100%, what is the chance for precipitation that day?

very likely

How does a sling psychometer help to tell how much humidity is in the air?

water on the bulb evaporates and cools the thermometer

The instrument used to find Dew Points and Relative Humidity

with a sling psychrometer


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