12/3 Dewpoint and Relative Humidity

Front

What is Dewpoint?

Back

The dewpoint is the temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid water.

Front

What is Relative Humidity?

Back

Relative humidity is the amount of moisture in the air compared to the maximum amount of moisture the air can hold at a given temperature, expressed as a percentage.

Front

What happens to relative humidity when the temperature increases?

Back

As temperature increases, relative humidity decreases if the amount of moisture in the air remains constant.

Front

What happens to relative humidity when the temperature decreases?

Back

As temperature decreases, relative humidity increases if the amount of moisture in the air remains constant.

Front

How is relative humidity calculated?

Back

Relative Humidity (%) = (Actual Vapor Pressure / Saturation Vapor Pressure) x 100.

Front

What is the relationship between dewpoint and relative humidity?

Back

A higher dewpoint indicates higher moisture content in the air, leading to higher relative humidity.

Front

What is a sling psychrometer?

Back

A sling psychrometer is an instrument used to measure the relative humidity of the air by comparing the temperatures of a wet-bulb and a dry-bulb thermometer.

Front

What is the dry-bulb temperature?

Back

The dry-bulb temperature is the temperature of air measured by a regular thermometer, reflecting the air's thermal state.

Front

What is the wet-bulb temperature?

Back

The wet-bulb temperature is the lowest temperature that can be reached by evaporating water into the air, measured using a thermometer with a wet wick.

Front

What does a relative humidity of 100% indicate?

Back

A relative humidity of 100% indicates that the air is fully saturated with moisture and cannot hold any more water vapor.