Why doesn't atmospheric pressure act on or crush non-living objects?
Why doesn't atmospheric pressure act on or crush non-living objects?
All materials have to withstand atmospheric pressure. It is about 1kg per square centimeter at sealevel. Living or non-living materials, liquids, gases, solids, all of them. Normally, materials compress under pressure until the internal forces balance the pressure. Soft materials (think Marshmallows) are more compressed than, say mild steel that is only compressed by ~10−610−6. This means that all materials expand when subjected to vacuum. Marshmallows more than steel.
Living organisms contain a lot of water which is not easily compressible so the amount they get compressed is very small. Thus, the idea that humans exposed to vacuum explode is nonsense.
Equally nonsense is the idea that things cease to exist or will be crushed to dust when exposed to high pressure. They may change their physical properties slightly (e.g. ice ‘flows’ when subjected to high pressure, so does salt) but they don’t cease to exist.
in case of human ,Crushing pressure. Human bodies are used to air pressure. The air pressure in our lungs, ears and stomachs is the same as the air pressure outside of our bodies, which ensures that we don't get crushed. Our bodies are also flexible enough to cope when the internal and external pressures aren't exactly the same.
LIke if satisifed
All materials have to withstand atmospheric pressure. It is about 1kg per square centimeter at sealevel. Living or non-living materials, liquids, gases, solids, all of them. Normally, materials compress under pressure until the internal forces balance the pressure. Soft materials (think Marshmallows) are more compressed than, say mild steel that is only compressed by ~10−610−6. This means that all materials expand when subjected to vacuum. Marshmallows more than steel.
Living organisms contain a lot of water which is not easily compressible so the amount they get compressed is very small. Thus, the idea that humans exposed to vacuum explode is nonsense.
Equally nonsense is the idea that things cease to exist or will be crushed to dust when exposed to high pressure. They may change their physical properties slightly (e.g. ice ‘flows’ when subjected to high pressure, so does salt) but they don’t cease to exist.
in case of human ,Crushing pressure. Human bodies are used to air pressure. The air pressure in our lungs, ears and stomachs is the same as the air pressure outside of our bodies, which ensures that we don't get crushed. Our bodies are also flexible enough to cope when the internal and external pressures aren't exactly the same.
LIke if satisifed
