Wednesday, January 11, 2012

why do people float in waterWhy do some people float in water while others sink?

Most people seem to be able to lay back in water, relax and float naturally. I on the other hand, sink like a stone. I'm curious to know what it is about body composition that makes you float. Some people have said oxygen in the blood while others say its body fat.
It's a question of the relative amounts of muscle and fat, together with the density of your bones. Basically, if your overall body density (mass/volume) is >1 you will sink, if it's <1 you will float.

The air in your lungs *does* make a difference, since taking a deep breath both expands your volume, and increases the amount of low-density stuff in that volume. If I have a lungful of air, I can just about float; breathe out, and I sink.
This is the first thing you will learn when you take a swimming lesson.
A lot depends on your body's composition. Buoyancy is regulated by body density and some people have less flesh, which assists floatation, than bone, which doesn't, as a proportion of body weight makeup, than others. It also depends on race as some have evolved differently with a bigger proportion of bone so, for example, black peopwhy do people float in waterle have more bone as a proportion of body weight than white people so they make very poor swimmers. If you're black then this could be your problem. Sadly there is no way of rectifying it.
Look up buoyancy
They are witches.
it isn't body composition, you have to relaxe on the water and trust it to hold you up. I am willing to bet that you lean back and panic and stiffen up the minute the water starts to give. You have to relaxe your body and sorta spread you rarms and legs, and be prepared for a little water on your face and in your ears, you gotta just relaxe into it.
Depends on if they are a witch or not. :)
well if your name is bob you float and if your name is rocky you sink!
It is body fat. I have only 6% body fat, and I also sink like a stone!
It is bouyancy, but the issue of bouyancy is of two parts. The first is the density of the body the body fat, muscle, etc. Muscle is denser than fat. The second part the the contact point of pressure. Basically its the cross-sectional area between you and the water. If you are just straight up and down the water has a much smaller area to push up on you, butwhy do people float in water if you are laying on your back the water can puch up on a larger area, its like a bed of nails, thats why people can lay on them because a thousand nails are holding you up not just 10. And also just relax, tensing up agitates the muscles, which releases a bit of air in them that make you denser, and the amount of chemicals in the body of water changes it two, as in Lake Placid versus the Dead Sea, the Dead Sea would be easier to float in because how much salt is in it. Hope this helps.
All people are able to float because their densities are lower than that of water 1.0grams/ml. Buoyancy is the force in water that pushes objects upward and helps people and objects float.
Note: Salt more is more dense than pool water because salt increases the density of water to about 1.07 instead of 1.0.
I hope this is helpful
depends on body balance
It has nothing at all to do with body fat. It has to do with density. If a person is less dense than the water, the person will float in the water. If they are more dense than the water, that person will sink.
balence

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