Question

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Q 4. Answer the following questions:
a) Why is the air in a region dry?
(b) How is humidity measured?
(c) What
the prerequisites for
condensation?
(d) What is a cloud? Write its types.
(e) Which type of clouds give rain?
(f) On what does the percentage of relative
humidity depend?
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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

a)The air in a region is dry primarily due to low moisture content. Moreover, distance from the sea, the high speed of the wind and increased rate of evaporation contribute to a decrease in the moisture holding capacity of the atmosphere.

b)Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer. A psychrometer uses two thermometers to measure relative humidity; one measures the dry-bulb temperature and the other measures the wet-bulb temperature.

c)The only requirements for condensation are moist air and a cool surface. In the winter, the moisture content of the indoor air (usually measured as relative humidity or vapor pressure) is important, as is the temperature of the surface on which this moisture could condense.

d)In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body or similar space. Water or various other chemicals may compose the droplets and crystals

e) Nimbus" comes from the Latin word for "rain.") Two examples are the nimbostratus or cumulonimbus clouds. Nimbostratus clouds bring continuous precipitation that can last for many hours. These low-level clouds are full of moisture. Cumulonimbus clouds are also called thunderheads.

f)The temperature to humidity content ratio is dependent upon the temperature and pressure at the particular place at that particular time, when we are trying to find out the relative humidity. The warm air is capable of absorbing more water vapour than the relatively cooler one and thus the warm air is more humid