|
|
|
|
Is a pressurized air object heavier?
wrote:
On Fri, 28 Oct 2005 11:25:34 GMT, "Joseph Meehan"
wrote:
wrote:
On Thu, 27 Oct 2005 21:59:18 -0700, "Bill"
wrote:
What about a pressurized tank of helium? Heavier full of helium than
empty?
What if you released the gas from the helium into a large balloon
which was attached to the helium tank. Would the balloon at some
point lift the helium tank once it was filled with helium from the
tank?
Of course not, or the tank would float without the balloon......
Error.. If the balloon expanded enough so that it displaced
enough air that the weight of that air (air does have weight) was
greater than the weight of the tank and helium, then it would float.
Think of it this way. The full tank weighs more than an empty
tank. If you start filling balloons and tie each one onto the tank,
each one will try to lift the tank. As the tank is emptied it gets
lighter and there are more balloons trying to lift it. Get enough of
the them and the tank will be lifted.
Mark
That's weird......
I guess thats bcause its not compressed any longer, huh?
Indirectly yes. When it is contained, but under less pressure it will
take up more space, displacing more air and like a boat it will float.
Now, as if this thread was not already crazy enough, I got to
thinking.
If a person fills all the tires on their car with helium instead of
air, will the car be lighter on the ground and save fuel? (((Just a
thought))). Obviously the car would not float because it's too haevy
and there is not enough helium. If this worked at all, it would not
be a good idea in winter when weight is needed for traction on snow
and ice.
Yea, it likely would be lighter (some uncertainty because I don't recall
how helium acts under pressure, if it were to compress sufficiency more than
air, it might not be lighter, but I really don't think that is an issue.
However it might be a few ounces lighter, not enough to worry about.
Of course if you filled the whole car with helium (after seriously
plugging all the leaks), would the car fly?
Not even if you could create a perfect vacuum (which would be even
lighter than helium. The car would still weigh far more than the air it
displaces.
This would not be a good
idea though because the driver would be talking like tweety bird on
his cell phone before he died a couple minutes later from lack of
oxygen..
This just keeps getting more and more interesting !!!! 
Mark
--
Joseph Meehan
Dia duit
|