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Humidity is the actual amount of moisture in a certain volume of air.
Relative humidity is the percentage of the maximum amount of moisture that's possible in certain volume of air for a particular temperature.
Example of Relative Humidity: Suppose a 5 ft. cube of air could could hold a maximum 10 oz. of moisture at 80 degrees. Now suppose that the cube of air actually contains 5 oz. of moisture. The Relative Humidity would be 50%.
The idea of humidity refers to how much water is mixed in with the air around us. Everywhere on Earth there is always at least some water mixed in with the air; in some places, like the desert, it's just a little; in other place, like by the ocean or in a rainforest, it's a lot.
The air can only carry around a limited amount of water vapor (evaporated water, or water in its gas form). At some point, there can be more water vapor than the air can hold, and the water turns into little droplets, which in nature is clouds, fog, or rain.
Just "humidity," also known as "absolute humidity," means "what is the concentration of water vapor (evaporated water) in the air right now?" In other words, it would give you a measurement of how much water you would get if you could take a box of air and squeeze all the water out.
This is expressed in units of mass/volume. So, for example, you could express the absolute humidity as 5 grams per liter (5 g/L) if there were 5 grams of water vapor floating around in every liter of air.
Again, the air can only carry around a limited amount of water vapor. How much it can carry is determined by the atmospheric pressure and the temperature. There is a mathematical equation that lets you figure out the maximum amount of water that the air can carry based on the pressure and temperature. Relative humidity is how much water the air is actually carrying divided by how much water the air could possibly carry. People, especially weather forecasters, usually express this as a percentage. So, if the air in a particular place is carrying exactly half the amount of water that it could theoretically carry, the relative humidity would be 50%. If it were carrying all the water it could theoretically carry, the relative humidity would be 100%. The relative humidity can never be higher than 100% or lower than 0%.
Relative humidity has no units, because it is just a fraction.
So, ways they are alike:
1. They both talk about how much water vapor is mixed with air in a particular place.
Ways they are different:
1. Humidity has units (mass/volume) but relative humidity is just a fraction or percentage.
2. Humidity doesn't care about how much water vapor it's possible for the air to have, but relative humidity does.
3. Humidity doesn't tell you anything about how close the air is to having rain or fog, but relative humidity does.
Specific humidty is the amount of water in unit amount of air by weight
and
Relative humidity is the amount of water in unit amount of air by pressure(partial pressure)
Relative humidity is one means of describing the amount of water in the air. Relative humidity describes the amount of water in the air as that precentage of the total amount air at that temperature should be able to hold.
Absolute humidity describes the amount of water in the air by saying how many grams of water per milliliter of air are present.
What else can I help you with?
What is the difference between anemometer and hygrometer?
An anemometer measures wind speed. A hygrometer measures relative humidity. Two different things entirely.
Which term means the amount of water vapor in the air?
The term is humidity.It is usually expresed as "relative humidity" which is the comparison between the amount in the air and the maximum that it can hold at a given temperature.Humidity
What is the relative humidity when the dry bulb temperature is 16 degrees Celsius and the wet bulb temperature is 14 degrees Celsius?
To calculate relative humidity when the dry bulb temperature is 16 degrees Celsius and the wet bulb temperature is 14 degrees Celsius, you can use a psychrometric chart or formulas. The difference between the dry bulb and wet bulb temperatures (2 degrees Celsius) indicates the moisture content in the air. Using these values, the relative humidity can be estimated to be approximately 83%.
What is the difference between relative and absolute anemia?
Relative = normal red blood cell count with a disturbance in regulation of plasma volume. ex- preganat women, athletes, post flight astronauts Absolute Anemia= Those types of anemia with an actual decrease in the number of red cells. Note: can be caused by a decrease production of RBCs or an increased destruction of RBCs
2 Define refractory period and differentiate between absolute and relative refractory periods?
refractory period is the interval between action potential , the absolute refractory period is the period in which second action potential can not be initiated but in relative refractory period the second action potential can be initiated by the more strong stimulus.
What was the difference in relative humidity between noon and 5 pm how was the relative humidity affected by air temperature?
Relative humidity typically decreases from noon to 5 PM due to rising air temperatures, which increase the air's capacity to hold moisture. As temperatures rise, the relative humidity can drop even if the absolute amount of moisture in the air remains constant. This results in a lower relative humidity reading in the afternoon compared to midday. The specific difference in relative humidity would depend on the actual temperature and moisture content at those times.
What is the difference between absolute variation and relative variation?
relative change is a proprotional change where absolute change is a complete change.........
The difference between absolute and relative location?
absolute location is the exact place and relative location is were the place is related to something else.
What is the difference between the relative age and absolute age of rocks?
Relative age is the age of a rock relative to the rock layers around it, absolute age is a rock's exact age.
What is the difference between absolute and gauge pressure?
Absolute pressure is measured relative to a perfect vacuum, while gauge pressure is measured relative to atmospheric pressure.
What is the difference between absolute deviation and relative deviation?
absolute deviation is a difference between say two numbers. The result has the same units as the two numbers have. Relative deviation is a ratio and so it is a pure number without any units.
Difference in Relative risk and risk ratio?
There is no difference between the two. Relative risk is the same as relative ratio. Commonly abbreviated as RR, relative risk/ratio is measure of absolute risk in one population as a proportion of absolute risk in another. It is a measure of the strength of association.
What is the difference between humidity and relative humidity?
Humidity refers to the amount of water vapor in the air, while relative humidity is the ratio of the amount of water vapor present in the air to the maximum amount of water vapor the air can hold at a given temperature.
What's the difference between humidity and relative humidity?
Humidity is the amount of water vapor in the air, while relative humidity is the ratio of the amount of water vapor present in the air to the maximum amount of water vapor the air can hold at a given temperature.
What is the difference between absolute path name and relative path name in Unix?
Absolute path: Path from root directory (it is the same place, wherever the current path is) Relative path: Relative to the current path.
What is the difference between gauge pressure and absolute pressure?
Gauge pressure is the pressure measured relative to atmospheric pressure, while absolute pressure is the pressure measured relative to a perfect vacuum.
What is the difference between relative humidity and humidity?
Relative humidity is a measure of the amount of moisture in the air compared to the maximum amount of moisture the air can hold at a given temperature. Humidity, on the other hand, is a general term that refers to the amount of water vapor present in the air.
