Earth's atmosphere is a layer of gases that surround it, permitting life and protecting life by absorbing ultraviolet solar radiation, warming the surface by retaining the heat and mitigating the temperature difference between day and night.
Questions tagged [air]
732 questions
18
votes
6 answers
Reason for strange "canyons" of dust on the cooling platform
I took apart my cooling platform Something like this :
And I found something like this inside :
I wonder why around the hollows are the "canyon like" structures.
PS: I also drop this platform on the floor, maybe this could be a reason ?
EDIT…
2
votes
3 answers
Kitchen physics question I should know.
I don't know anything about physics so this may sound dumb. I punctured a hole on the top of a condensed milk can to drizzle on my snow cone, but when I tried to poor it it barely came out. I randomly had the though to poke a hole on top still, but…
Jice
- 21
2
votes
2 answers
Can this RC boat work in thoery?
We're a bunch of friends building an RC boat, this may sound stupid but I had an argument with a friend where he insisted that his design will work.
Basically, he's saying that by putting a powerfull fan and a piece of tissue as a sail, when the…
heidem
- 21
1
vote
0 answers
How to pump a bag in the fastest way?
I know the airbag utilize the reaction of sodium to make airbag expanded in a short time. Besides this way, is there any way to pump a bag(about tires size) in a short time?
Requirement:
<0.1s, the whole mechanism is portable, can be refilled…
Sam
- 111
1
vote
0 answers
Does forcing air through ever expanding pockets cool it?
If 30c air is pulled apart then forced back together repeatedly under extraction would this result in a cooling of the air as the energy is lost through a process of constant change?. What kind of pressures would need to be created to cool it…
Illa Ghee
- 11
- 1
0
votes
1 answer
How does the rate at which we enter air at lower pressure affect whether air bubbles will get stuck in our blood?
When we, for example, scuba dive, we will breathe air at higher pressure, hence the amount of dissolved gas in our blood will be higher (Henry's law) (right?). Now when we come back to normal pressure, the air pressure will be lower, and as a…
user397041
0
votes
0 answers
Would it be possible to use a device pumping air out of it to liquify the sand around it?
The question has to do with the demonstration done by Mark Rober when he made a hot tub by releasing air from below the sand upward at a rate that would increase the amount of air between the sand particles causing it to behave like water. The part…
0
votes
1 answer
How to calculate mass proportions of each compound in air?
We know average volume proportions between compounds in dry air. Here are the more important (in terms of proportions) ones:
How can we calculate mass proportions between these gases?
I'm considering a more general case, not only the exact values…
Elgirhath
- 125
0
votes
1 answer
Air Bearing pressure vs area
I'm interested in hovering 100 lbs.
I'm interested in knowing what pressure of air and what surface area is needed and how they relate to each other.
Cody Smith
- 173
-1
votes
2 answers
Is liquid "air" (nitrogen, oxygen, aragon mixture) flammable?
I was wondering if liquid "air" (nitrogen, oxygen, and argon mixture) was flammable. Imagine you have a container. This container contains liquid air. The air is in liquid form, and is in direct contact with two copper rods, which when a current is…
I. C.
- 11
-2
votes
2 answers
What will happen if a hairdryer is turned on in an air tight box?
I wanted to know what would happen if a hairdryer is turned on in an airtight box.
user300778
- 133