Questions tagged [air]
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.
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How strong a wind arises from turning 10 grams of air into a vaccum?
https://tvtropes.org/Characters/Juxtapose
Izuku's Quirk is "Minor Banishment", allowing him to banish up to 10 grams of anything he's touching from existence. However, he can only do so if ...
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What causes the oscillation in vortex shedding?
When studying this video, I was wondering: what actually causes the oscillation in vortex shedding? Most online sources say it's due to oscillating low-pressure zones—but what causes that oscillation?
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Why does desiccant cool down air?
I put a lot of desiccant inside a large airtight container and left it for a while, then I opened it and put my hand inside, I can feel the air is much cooler, why is that?
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What is the maximum speed at which an unprotected human can travel (alive) in atmosphere?
When asked "what superpower would you like to have?", many people often answer with "flight", potentially because they think it would afford them "free travel". Focussing ...
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Can we create artificial pressure zones with extreme pressure differences simultaneously without a container?
I understand the basics of air pressure and convection, but there's a few things I don't quite understand. And I know that pressure can exist within a container, and I know that pressure is all over ...
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Why does water vapor sometimes start to twirl above a pot of boiling water?
I have noticed that when I boil water in my kitchen the water vapor starts to twirl like a tornado. This question has been puzzling me for some time now and I haven't been able to figure it out. Even ...
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How to imagine acoustic waves in brass instruments?
Its seems really clear to me how a guitar string vibrates. I can send a wave down a jump-rope by wiggling it the right way. The two fixed ends of the guitar string reflect this wave back onto the ...
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What will the pressure of accelerated air be relative to the pressure that accelerated it?
Imagine you have a high pressure reservoir filled with air. This reservoir is $1 \,\text{psi}$ above ambient atmospheric pressure. There is also a valve attached to the reservoir.
Now, open this valve....
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What is the maximum possible noise level on Earth and what would be its consequences? [duplicate]
The theoretical situation described here comes from the SCP-498 page.
SCP-498 is a theoretical device. It is an alarm clock that is triggered every 11 minutes, and creates a noise of 30dB. Until ...
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Does it take longer for the ball to rise to its maximum height or to fall from its maximum height back to the height from which it was thrown? [duplicate]
A ball of mass M is thrown vertically upward with an initial speed of v o. It experiences a force of air resistance given by F = -kv, where k is a positive constant. The positive direction for all ...
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Why don't liquid aerosols rapidly vanish by evaporation?
Liquid aerosols are known to be relatively stable.
However, given their immense surface area and tiny volume, we would expect them to rapidly vanish by evaporation.
Why are liquid aerosols ...
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Pressure of column of air and pressure of cinder block - what makes the pressure to apply from below in the former and not in the latter? [duplicate]
Pressure is force per unit of area.
I understand that the pressure at the ground is the force the column of air (above a surface of one square meter) exerts on that surface of one square meter. To be ...
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Will the pressure on the high-pressure side of a moving object in air be mirrored by an equal but opposite pressure on the low-pressure side?
Say you have an atmosphere of room temperature, sea level, 0% humidity air.
Then, imagine you have a steel cube moving through the air with one of the six faces directly into the wind.
If it’s moving ...
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Does air filling a vacuum produce a force?
Imagine you have a vacuum chamber set at a complete vacuum, and there is a valve to let air in.
If you open this valve, the air molecules will start moving into this empty area, eventually filling it.
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Brilliant's question on air pressure
I have always thought that as temperature increases the pressure does as well in an ideal gas, of course I know the air in the atmosphere isn't exactly an ideal gas but I would've thought that the ...
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