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Let's do a quick review of some facts about water vapor in air, and then we'll tackle this question. An air mass will have a given temperature and a given pressure. For air of a given temperature and pressure, only a certain amount of water vapor can be "suspended" in that air before it begins to condense and precipitate out (as rain, snow or something else). When the amount of water vapor in the air is at it maximum (for whatever temperature and pressure we cite), that air has 100% of the water vapor in it that it can hold. Any more water vapor and water will condense and precipitate out, as we stated. That's all we need to know to take on this question.
When we consider the amount of water vapor in a given air mass, we use a "standard" or and "index" to relate that amount of water vapor to something "fixed" to make our measurement. The reference in this case will be the maximum amount of water vapor that an air mass can hold at that temperature and pressure (whatever they are). In the case of this question, if the relative humidity of an air mass is 70%, that air mass (whatever its temperature and pressure) is holding 70% of the water vapor that it can possibly hold. Note that term we use is relative humidity. The "amount" of humidity in an air mass that has a relative humidity of 70% is 7/10ths (70%) of the amount of water vapor that it can possibly hold altogether. We've compared the amount of water vapor in the air to the maximum amount of vapor that it can hold.
While it is true that an air mass may have this or that temperature and pressure, in any given air mass of whatever temperature and pressure, there is some maximum amount of water vapor that it can hold, and when we look at the amount of water vapor in that air mass, we compare it to that maximum amount that it can hold. That's relatively humidity, and when relative humidity reaches 100%, that air is saturated with water vapor and we can expect it to begin to precipitate out in the form of rain or another form of precipitation (depending on temperature and conditions aloft).
It might help to note that warmer air and air at higher pressure can hold relatively more water vapor that cooler, less "pressurized" (less dense) air. But whatever the temperature and pressure of an air mass, there is some maximum amount of water vapor that it can hold, and we look at how much is in it, and compare that to the maximum amount, and call the comparison the relative humidity.
What else can I help you with?
What does relative humidity of 75 percent mean?
Means Most of the Earth is Mostly Made Up Of That kind of Humidity . Obv.
What does the mass number on the periodic table mean?
The mass number is the combined number of protons and neutrons in the nucleus of the particular element you are looking at. NOTE: (don't be confused by the periodic table) Different elements have isotopes with varying mass numbers, so the mass number displayed on a periodic table is the ratio of those isotopic mass numbers in any given sample of the element your examining. This ratio is often confused with with the mass number of the element when it is displayed on periodic tables, it is actually the relative atomic mass. You can tell if a number is the mass number or a relative atomic mass by whether or not it is a whole number if it is then it's a mass number if it has decimal places out beside it then you're looking at relative atomic mass.
What does hyperbaric mean?
high relative pressure
Does the compounds C2H2 and C6H6 have the same percent composition by mass?
It does not necessarily mean that. For example glucose (C6H12O6) and formaldehyde (CH2O) have the same percentages of elements by mass, but are two very difference compounds.
A body which is in both rest and motion?
At rest and in motion are relative terms. When we say 'in motion' or 'at rest' we mean relative to something else. If you were travelling in a car for instance, you would be at rest relative to the car but in motion relative to the outside world.
What does it mean when relative humidity is 100 percent?
It is raining
What does relative humidity of 75 percent mean?
Means Most of the Earth is Mostly Made Up Of That kind of Humidity . Obv.
What does it mean when humidity is 100 percent?
This is called relative humidity. It is the ratio between the actual humidity, and the humidity for saturated air - that is, the maximum amount of water air can hold. This saturation point is dependent on temperature.
What does a relativly humidity of 75 percent mean?
A relative humidity of 75 percent means that the air is holding 75 percent of the maximum amount of moisture it can contain at a given temperature. This indicates that the air is quite humid, which can make it feel warmer and more uncomfortable. When relative humidity reaches this level, condensation may occur, leading to the potential for dew or fog. High relative humidity can also affect drying processes and increase the risk of mold growth.
What does a relative humidity of 100 percent mean?
oo thats on my science worksheet too. I can't find it anywhere. ugghh
What does it mean if the relative humitiy is 79 percent?
Relative humidity is the amount of moisture in the air compared to what the air can hold at that temperature - so to fully explain, we need to know the temperature
If the relative humidity is 90 percent does that mean there is only 10 percent of air left?
No, relative humidity refers to the amount of water vapor in the air compared to the maximum amount it can hold at that temperature. A relative humidity of 90% means the air is holding 90% of the maximum water vapor it can hold at that temperature, not that only 10% of the air is left.
What does humidity above 50 percent mean?
Humidity above 50 percent indicates a higher amount of water vapor in the air relative to its maximum capacity at that temperature. This can make the air feel damp and can affect how comfortable or uncomfortable it feels. High humidity levels can also contribute to the growth of mold and mildew.
What does it mean if the relative humidity of air is 25 percent?
A relative humidity of 25% means that the air is holding 25% of the maximum amount of water vapor it can hold at that temperature. It indicates that the air is relatively dry compared to its capacity to hold moisture.
What is the relative humidity of 32 degrees celsius?
It is not possible to know the relative humidity of a place with 32 degree celsius. It varies with location. For example, in tropical areas like Singapore, 32 degree celsius could still mean a relative humidity of 90% but in desert areas, 32 degree celsius would still have a low relative humidity. So temperature and humidity are not totally related.
What does 25 percent realtive humidty in the air mean?
It means that the air at the current temperature has 25% of the maximum moisture available at that temperature before becoming saturated. Relative hunmidity is relative to the amount of moisture the air can hold at temperature. It is relative because at higher temperature the air can hold more moisture. So at say 90F and 25% relative humidity there is much more moisture than at 70F and 25% relative humidity.
What does it mean when the relative humor yo 79 percent?
If you mean relative HUMIDITY, it means that the air is currently holding 79% of the moisture that it possibly could at the current temperature.If you really meant relative humor, I guess it means that about 1 out of every 5 of your jokes about your crazy uncle aren't funny.
