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The air is holding half the moisture that it has the capacity to hold. You can say nothing quantitative though with only this information.
It means that the air is holding as much water vapor as it can at that temperature. Any increase in moisture or decrease in temperature at that point will result in water condensing.
A hydrometer measures moisture in the air
humidity
If air is holding as much moisture as it can, colder air holds less than warmer.
No. The temperature of air does not necessarily affect how much moisture it carries. Warm air, though, is capable of holding more moisture than cold air is.
Air holds moisture. The warmer the air, the more moisture it can hold. So when warm air holding a fair amount of moisture comes in contact with the very cold dry ice, it cools down, and some of the moisture condenses out into those clouds you're seeing because the colder air is no longer capable of holding it.
Air density decreases with altitude, warmer temp and moisture
the air is holding 75% moisture relative to the temperature
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relative humidity
The moisture content is not the only factor. it has to do with the temperature of the air. WARM AIR RISES, Cool air falls. the air in the updraft is warmer than the air around it. The greater difference in temp means faster and greater updrafts
When the surface of an object becomes colder as a result of sending its latent heat out, the existing moisture in the atmosphere contracts among itself. the air capacity for holding water depends on temp'. the warmer it is the more water vapor it can hold. during the night air temp' drops to its lowest near dawn at which point the amount of water vapor in the air may exceed its reduced capacity (this point is called the dew point) and water vapor condenses and forms dew.
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The air is holding half the moisture that it has the capacity to hold. You can say nothing quantitative though with only this information.