Questions tagged [humidity]
The humidity tag has no usage guidance.
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How to extrapolate device's operational range of relative humidity from stated values? [closed]
Instrument manufacturer's usually state operational relative humidity range at certain temperature, for example, 10 % -90 % at 35 C (non-condensing). They also state the operational range for ...
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How long does it take to saturate the water vapor pressure in a small enclosed space?
I am trying to create an as much humid as possible small enclosed space (like a zip bag).
If I leave more than required amount of water in the zip bag, how long does it roughly take to reach the ...
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Dewpoint of a particular place
can dewpoint of a certain room change if I decrease the temperature or increase it? And what factors does RH,Dewpoint and Saturated cloud pressure depends on?
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For hot air at 150 °C have a density of 0.61 kg / m³, how to calculate the density for 160 °C? [closed]
I am working on a project draft and in an existing device, hot air up to 160 °C is generated for drying processes.
I have found old documents where densities of air are reported at three different ...
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Steam from a cup of coffee
I observed that, in winter there is more visible steam from a cup of coffee than in summer. Is there any phenomenon taking place here.
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How do I calculate the Relative Humidity from number density and pressure? [closed]
From some measurements I have determined and calculated the temperature and number density of water molecules in (m^-3) at a pressure of X Pa. How do I get the RH value out of those variables?
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Why there is water produced on the phone if we keep our phone in our pocket for a longer time?
one day I kept my phone in my pant pocket, I haven't opened it for a long time. My phone is covered with a plastic case. So why the phone is getting wet when I observed it after some time even though ...
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Is stoßlüften - quick exchange of air through windows actually more efficient than slow exchange through a wall ventilation fan?
In German areas with near air-tight homes, it is recommended that full house ventilation is performed by stoßlüften - opening windows fully to exchange as much air as possible in shortest amount of ...
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Is water capacity of air affected by air pressure?
Air can hold water in proportion to partial pressure of water vapor. This is affected by temperature. But is the water capacity of air also affected by ambient pressure?
I did find some answers that ...
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Does relative humidity rise faster in cooler or warmer air?
A bit of background: I live in an old house in Austria and have been following the changes of temperature and relative humidity in our basement (which has two small but permanently open windows).
The ...
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How does athmospheric pressure influence dewpoint?
I have a sensor that measures temperature, relative humidity and air pressure.
All the formulas I could find for both absolute humidity and the dew-point only use the temperature and humidity values, ...
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How much electricity can be directly generated from air humidity?
There have been some recent papers on harvesting electrical energy from air humidity using nanoengineered materials:
"Power generation from ambient humidity using protein nanowires" in ...
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Can water in a small container increase the humidity of the surrounding area? [closed]
I have been instructed to keep a liquid drug in a cool and dry place (away from humidity), at temperature not exceeding $25^\circ$ C, but also to avoid freezing it, as it may crystallize. On a very ...
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Effects of altitude on constant relative humidity maintained by aqueous glycerin solutions
ASTM D5032-19 describes how to generate and maintain a constant humidity by means of aquesous glycerine solutions. The procedure allows for the relative humidity to be calculated from the mass of the ...
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Why does relative humidity appear limited for temperatures above 80°F?
I recently compiled ten years of NOAA local climatological data. I noticed that the maximum relative humidity dropped linearly from 100% at about 80°F to 20% at about 110°F. Nothing obvious comes to ...
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