Question

why do dead bodies Float ?

Answer 1

For the same reason that live bodies do: they are full of gas. The adult human body is about 60% water and the density of the other 40% is only a little greater than water.

Overall this brings the total density to 1.01/cm 3. This means that if you weigh 70kg, you have a volume of 69.3 liters. In order to make yourself neutrally buoyant, you would therefore only need to increase you volume by 0.7 liters — about the same as two cans of cola.

When you’re swimming your lungs contain at least that much air at all times and so you float. If you drown, your lungs fill with water and you sink. But after three days or so, the bacteria in your intestines will have produced that two cola can’s worth of methane and carbon dioxide and you’ll float back to the surface. In very cold water, the bacterial action is slowed down and fish and crabs might eat you first.

Answer 2

why do dead bodies float?

When someone drowns and dies, the body starts to sink because the air in its lungs is replaced produce enough gas like methane, hydrogen sulphide & carbon dioxide.

As the gas is light the body float back to surface of water.slowly with water thus increasing density.

It remain submerged for some days until the bacteria in the gut and chest cavity.