Q1: Dew point of air indicates its

ANS:A - moisture content

The dew point of air indicates its moisture content. Explanation:

1. Dew Point: The dew point is the temperature at which air becomes saturated with water vapor, leading to condensation or dew formation. It is the temperature at which the air can no longer hold all the water vapor it contains, resulting in the vapor condensing into liquid water. At the dew point temperature, the air is in a state of saturation with respect to water vapor.
2. Moisture Content: The dew point is a measure of the moisture content or humidity level of the air. When the air's temperature drops to the dew point, it has reached its maximum capacity to hold water vapor, and any further decrease in temperature will cause the excess water vapor to condense into liquid form. Therefore, the dew point provides valuable information about the amount of water vapor present in the air.
3. Dryness: The dew point is not directly related to the dryness of the air. Instead, it indicates the opposite – how humid or moist the air is. Lower dew points correspond to drier air, while higher dew points indicate more moisture in the air.
4. Latent Heat: While condensation at the dew point involves the release of latent heat, the dew point itself does not directly indicate latent heat. Latent heat is the energy absorbed or released during phase changes, such as when water vapor condenses into liquid water. However, the dew point temperature does mark the temperature at which this phase change occurs in the atmosphere.
5. Coolness: The dew point is not a direct measure of the coolness of the air. However, cooler air temperatures generally result in lower dew points, as cooler air can hold less water vapor before reaching saturation. Therefore, lower dew point temperatures are often associated with cooler, drier air masses.

In summary, the dew point of air indicates its moisture content or humidity level, representing the temperature at which the air becomes saturated with water vapor and condensation occurs. It is an important parameter for understanding atmospheric humidity and weather conditions.