Humidity Definition and 121 Threads

The humidity of air is influenced in part by temperature, in that the higher the temperature, the higher the capacity for water vapour. What I'm trying to figure out is why. I can come up with a couple ideas, ranging from hydrostatics to increased energy keeping liquid bonds from forming; but...

Everyone in my office (8.5 x 3.5 x 6 meters) was complaining of dry eyes/throat. We thought "hey we should check the humidity". We bought two separate humidistat's that both read 15% RH at 73 degrees F! So we bought a humidifier. Just one of the small ones that holds 2.2 gallons and empties...

what is the relation between humidity and temperature? what effect when on humidity when temp. increase or decrease?

Homework Statement If a person breathes 10 liters per minute of air at 68 degrees F and 50% relative humidity, how much water per day must the internal membranes supply to saturate the air at 98.6 degrees F? (Assume all the moisture is exhaled). I f each gram of water extracts 580 calories as...

Hi all, i have been assigned a task to decrease humidity level in a office environment. Since the office is located in tropic areas, therefore the surrounding air humidity is always around 80-90%. However, the office is equipped with centralized air conditioning, ACMV system. Current...

...is not fun. I have a telescope that I got when I was a lot younger. A nice (I think) little beginner telescope, a Meade Polaris 60mm. Anyway, my problem is the humidity where I live. I live in Louisiana. Everytime there's a clear night and I decide to go try and do a bit of looking, to try...

I am looking for equations valid at temps up to 500 degrees F, that allows one to calculate the relative humidity for air based on wet bulb and dry bulb temps. Everything that I can find is only accurate at lower temps. For that matter I can't even find a psychrometric chart that goes that high...

How can you calculate density from : altitude temperature and absolute humidity

Homework Statement Estimate the mass of water vapor that is contained in 1 m^3 of saturated air at a temperature of plus 20 degrees Celsius 2. The attempt at a solution I looked up the saturation pressure for water vapor at the given temperature. Can I just use the ideal gas-law for the...

Ok, let me know if this belongs in a different forum or not, but here's a question: is the difference in air density between hot and cold air less pronounced when the air is humid? A friend of mine has an apartment that's pretty cold this time of year. And her apartment's pretty dry. So she...

My brain is fried on other subjects. Help me! Given: Max Water Vapor Capacity for Air @ 70 degrees F (21 deg. C)= 8g/cubic foot. At 60% relative humidity, the actual water vapor content is 4.8g/cubic foot. If the room temperature were lowered to 60 degrees F (16 deg. C) at which the max...

Does the humidity in the air affect the density? and how does it affect? thanks

Hi, as the topic stated, i would like to find out, does the humidity in the air affect the density?? thanks

affect the infiltration of water in the soil? :bugeye: Thank you thank you thank you.. :]

Heres the scenario there was a pool of liquid on the table it was one of those hot days when the air is uncomfortable and sticky, TASK plan experiment to find out weather differences in relative humidity influences how much water collects on the outside of a metal can. WHat is the best...

Hello everybody, A friend of mine asked me a question regarding one of his milk-processing techniques. He wants to learn if a mathematical formula or a logical approach can be devised. Okay, the question involves a 1 liter-volume-bowl, whose outer (bigger) radius is 160 mm. He didn't say...

Moist air has these values; 760mmHg, 80%, 30 degrees C. I have managed to find the humidity ratio (21,65 g/kg), but how can I determine the specific enthalpy?

In my area, humidity is where it's at. One of the problems I noticed when grabing my mirror (first time using it) to pack up was the fact that it soaked up enough water that I can't even see myself in it. This explains why it didn't work. I DID NOT WIPE THE LENSES. I just put the...

Why does static charge build up more easily in dry air? One site on the WWW mentioned that it has to do with the fact that under humid conditions, water molecules coat surfaces. I know that water molecules have net dipoles, but it's not really clear what effect that has.

I tried to check out Mars and the moon the other night with my new orion dob.. but it was so humid that the scope got all fogged up... is this just something you have to live with? Are nights of high humidity just bad nights to go observing?

it is not a myth that on some days our hair seems to not want to cooperate with whatever style we've chosen (this is especially true for women's hair styles). meteorologists use an instrument known as a hair hygrometer to measure the humidity in the atmosphere, because human hair has been found...