what is that floats on water but can never stay on water for long?
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PAPER floats on water but can never stay on water for long
what is that floats on water but can never stay on water for long?
Hey guys, I found it urgent to inform readers why a person who had inhaled a large breath of air will float more easily than he who's just exhaled. This is solely due to the volume and not a result of the air (not oxygen, persay, for air is approx 78% nitrogen, 10% oxygen and 2% argon, carbon and various regionally dependent gases and/or vaporized liquids.) Most of you have heard the term buoyant force. The buoyant force is equivalent to the density of the [surrounding] fluid multiplied by the force of gravity and the volume of the object known as the volume of liquid displaced once on object's placed into liquid. Which looks like this:
Buoyant force = fluid density × force of gravity × volume of fluid displaced*
WHAT DOES THIS SAY ABOUT FLOATING OR SINKING?
WELL, if you want to see if someone will float, their force due to gravity must be less than the buoyant force found via said equation. A persons force is their mass multipled by the acceleration due to gravity which is 9.8m/s^2 anywhere on earth. Fortunately our scales have done the work and our weight is in fact our force (our mass would be weight÷9.8m/s^2 ie, a person weighing 150 pounds, must be first converted into metric system as 68 kg and subsequently divided by 9.8. This is person has a mass of 6.94 kg no matter where he is in the universe, because its independent of gravitational force; his weight, however, is his “downward force” or his force accelerating towards earth, which is his mass × earth's gravity of a 9.8.)
If a person, will float his force or weight must equal less than the buoyant force. THIS IS WHERE THE INHALI.G COMES INTO PLAY: Once a person is in water or any other fluid, the density of the surrounding fluid won't change, either will force of gravity, the only way to increase the buoyant force is to increase the volume of the person or object. Why is weight won't change. When it stays the same and the buoyant force increases due to the objects volume, and if this causes the buoyant force quantity to become greater than one's weight, he will float. When you in tell your lungs expand into the tissue that with scrunched up a Fuller is now at floors length and it doesn't matter if your lungs become full of air or oxygen or another gas it is the expansion of the person, the space taken up by the person, which is his volume, that increases the buoyant force that will help him be able to float, not the gas itself.
*It is far easier of a task to measure an object's volume via fluid displacement vs measuring volume via its physical attributes in the following: length × width × height. Imagine measuring all of these aspects in an obscure object ike a car engine? That's why we use displacement to measure a car's engine.