After eating, wait before swimming. Why?

[ogibillm]

no.

Excuse me?

the displacement, mass, and shape of the food you ate does not change depending on if you are wet or dry.

Don't tell your lungs that. Been constricting and re-expanding all along depending on pressure.

so you think under greater pressure the food would start to displace more fluid? doesn't make sense.

It'll float in any fluid or stomach acid just like our entire body floats in the water.

Many true things are also counter-intuitive. Don't get me started on time.

okay. but buoyancy is a measure of the amount of fluid a body displaces. fluids don't compress (much), so the density of the fluid doesn't increase with pressure. compressing a solid would make it more dense.
so how does the buoyancy of the food in your stomach change? what physical process would make that happen?

 

[Delta4Embassy]

Excuse me?

the displacement, mass, and shape of the food you ate does not change depending on if you are wet or dry.

Don't tell your lungs that. Been constricting and re-expanding all along depending on pressure.

so you think under greater pressure the food would start to displace more fluid? doesn't make sense.

It'll float in any fluid or stomach acid just like our entire body floats in the water.

Many true things are also counter-intuitive. Don't get me started on time.

okay. but buoyancy is a measure of the amount of fluid a body displaces. fluids don't compress (much), so the density of the fluid doesn't increase with pressure. compressing a solid would make it more dense.
so how does the buoyancy of the food in your stomach change? what physical process would make that happen?

Food floats in whatever fluid is in our stomach at surface pressure. At surface pressure plus 1 atmosphere (2 atmospheric pressures total, most we're likely to experience in a swimming pool,)
everything compresses however far it can, as you said fluid doesn't compress for all intents and purposes, yet this glob or solid and fluid is now 'floating' in the stomach cavity which itself is starting to compress.

Imagine the swimmer in a pool as the food inside the swimmer's stomach. Just as the swimmer floats, food inside the swimmer floats as well assuming there's fluid inside the stomach (stomach acid typically if no other fluids.) What's happening on the outside as with swimmer and the pool is mirrored inside.

 

[ogibillm]

the displacement, mass, and shape of the food you ate does not change depending on if you are wet or dry.

Don't tell your lungs that. Been constricting and re-expanding all along depending on pressure.

so you think under greater pressure the food would start to displace more fluid? doesn't make sense.

It'll float in any fluid or stomach acid just like our entire body floats in the water.

Many true things are also counter-intuitive. Don't get me started on time.

okay. but buoyancy is a measure of the amount of fluid a body displaces. fluids don't compress (much), so the density of the fluid doesn't increase with pressure. compressing a solid would make it more dense.
so how does the buoyancy of the food in your stomach change? what physical process would make that happen?

Food floats in whatever fluid is in our stomach at surface pressure. At surface pressure plus 1 atmosphere (2 atmospheric pressures total, most we're likely to experience in a swimming pool,)
everything compresses however far it can, as you said fluid doesn't compress for all intents and purposes, yet this glob or solid and fluid is now 'floating' in the stomach cavity which itself is starting to compress.

Imagine the swimmer in a pool as the food inside the swimmer's stomach. Just as the swimmer floats, food inside the swimmer floats as well assuming there's fluid inside the stomach (stomach acid typically if no other fluids.) What's happening on the outside as with swimmer and the pool is mirrored inside.

a rock will sink in a bathtub, swimming pool, or lake. a piece of cork will float in a bathtub, a swimming pool, and a lake.
the size of the container of water has no effect on the buoyancy of the object.