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Questions tagged [pressure]

For questions about creating, modifying, or applying pressure, whether from a gas, fluid, or solid. Also for questions about the effect of pressure on creatures and objects.

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How would hydrostatic skeletons respond to different atmospheric pressures?

I'm wondering whether atmospheric pressure (high or low) would have any impact on the favorability of hydrostatic skeletons. Obviously hydrostatic skeletons work well in water, but I'm not sure if a ...
Elhammo's user avatar
  • 975
4 votes
1 answer
232 views

On a planet with a 2 atm atmosphere, how would atmospheric pressure affect plant evolution?

Leaving aside the atmospheric composition (let's say there's the same amount of oxygen, despite the higher pressure), would the pressure itself have any effect? Would plants need to be stockier and ...
Elhammo's user avatar
  • 975
10 votes
2 answers
2k views

How deep under water could a vessel go?

The Trieste submarine reached the bottom of the Mariana trench using some clever techniques like gasoline ballast, but let's assume the ocean just kept going to the core of the earth (or maybe the ...
Leon Frickenschmidt's user avatar
8 votes
7 answers
3k views

Why won't Venusians just explode in our own atmosphere when they're not even wearing protective suits?

So "Venusians" are these Star Trek-y humanoid aliens that evolved on a planet with more than 75 times Earth's atmosphere. In a lot of ways this makes them not too dissimilar from deep sea ...
LiveInAmbeR's user avatar
  • 10.6k
12 votes
6 answers
3k views

Space with a breathable "atmosphere" - How to make it kind-of believable?

The idea in its simplest form is that a stellar system of planets is within a transparent gas cloud that includes oxygen. The gas cloud is so incredibly dense (around sea level earth pressure) that ...
Jarrad's user avatar
  • 326
4 votes
1 answer
349 views

What should be the dimensions and pressure used in the 5 ton Hydraulic McKibben artificial muscles in my 2,55 meter mechs?

Context: "Human-sized mechs" are a common thing on in society right now, these are an "interesting" alternative to exoskeletons that can snap the spine of its users in half. They ...
Fulano's user avatar
  • 209
8 votes
3 answers
1k views

How would atmospheric pressure change in a giant hole through the earth?

A giant hole exists in the earth surrounded by a super material that can withstand the extreme temperatures and pressures from the crust to crust through the center core of the earth. It is perfectly ...
Ansible's user avatar
  • 621
2 votes
1 answer
229 views

What types of adaptations might alien life have to survive high atmospheric pressure?

I’m wondering if anyone has any scientifically plausible ideas for adaptations to a high atmospheric pressure (10 atm) environment. This pressure would be too high for humans to survive for extended ...
Elhammo's user avatar
  • 975
11 votes
8 answers
3k views

What key invention allows the exploration of my hot humid world?

I want to know what key invention would allow my civilization to travel down to and explore its world at sea level. This is similar to my previous question* but this time does not assume metals are in ...
Slarty's user avatar
  • 37.6k
4 votes
1 answer
180 views

How to calculate temperatures on my world given different pressures and altitudes

The fictional world is Earth-like with 1g gravity and similar solar radiation to Earth but the inhabitants only live on very high plateaus at around 5000m where the pressure is already 3bar. How do I ...
Slarty's user avatar
  • 37.6k
5 votes
2 answers
272 views

Lighting system for early submersibles such as the Nautilus

Assume one constructed a submersible such as what Captain Nemo commanded, the Nautilus, and it had a useful depth of 1km. Using 19th century technology, what would they need to develop to allow ...
Vogon Poet's user avatar
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2 votes
1 answer
385 views

What would a dead body look like after spending 20 minutes at 1500 PSI? [duplicate]

You always hear "crushed like a soda can," but I'm pretty sure that the body wouldn't be much smaller than normal. The person wouldn't be breathing, so nitrogen narcosis wouldn't be an issue....
Robert Rapplean's user avatar