SOLAR SYSTEM

UNIVERSE

ATMOSPHERIC BASIC PROPERTIES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Dew point is used by meteorologists to describe ____
A
the amount of condensation of water vapor in the air
B
energy exchange for states of matter
C
adiabatic heating
D
how expanding gas decreases in density and pressure
Explanation: 

Detailed explanation-1: -The dew point is the temperature below which the water vapour in a volume of air at a constant pressure will condense into liquid water. It is the temperature at which the air is saturated with moisture.

Detailed explanation-2: -Dew points indicate the amount moisture in the air. The higher the dew points, the higher the moisture content of the air at a given temperature. Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation.

Detailed explanation-3: -You ever wonder why meteorologists always talk about dew points instead of the relative humidity? It’s easy! Dew points express the true amount of moisture in the air which correlates to how sticky or humid it feels outside.

Detailed explanation-4: -Dew point is the temperature at which water vapor in any static or moving air column will condense into water. In other words, the air is saturated and can no longer hold the moisture at this temperature. When the air temperature drops below its dew point, excess moisture will be released in the form of condensation.

Detailed explanation-5: -Absolute humidity (expressed as grams of water vapor per cubic meter volume of air) is a measure of the actual amount of water vapor (moisture) in the air, regardless of the air’s temperature. The higher the amount of water vapor, the higher the absolute humidity.

Detailed explanation-6: -For saturated air-vapour, the dew point depression is zero, that is Dew point temperature = Dry bulb temperature. ∴ In a saturated air-water vapour mixture, the Dry bulb, wet bulb and dew point temperature are the same.

There is 1 question to complete.