Jeff Wisnia wrote:
have mass and are attracted to the Earth
Another question involving "sublimation."
There is only one common substance that transforms directly from a solid to
a gas without passing through a liquid phase first. What is it?
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?
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
I guess thats bcause its not compressed any longer, huh?
Now, as if this thread was not already crazy enough, I got to
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
Of course if you filled the whole car with helium (after seriously
plugging all the leaks), would the car fly? 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
This just keeps getting more and more interesting !!!! :)
I didn't see that show - what size balloons were they using? The
references I've seen to Lawnchair Larry all say that he was using 40 +
weather balloons. I don't know what size his balloons were, but it
seems like 40 6-8' weather balloons would be plenty to lift an adult
Do you think that the FAA didn't really fine Walters or Walsh?
Wow. I certainly didn't know all these details. Thanks
He spent 110 dollars for the lawn chair. I assume it was made from
aluminum. I didn't realize one could spend that much for an aluminum
chair, but when you're going to 15,000 feet, it's worth the extra 95
I didn't hear about this on the internet, which didn't exist then. I
read it in the paper. I'm sorry thinkgs didn't turn out well for
Larry. he had more imagination and courage than I do.
Remove NOPSAM to email me. Please let
me know if you have posted also.
Unless you were driving a monster truck with REALLY big tires it
wouldn't change the weight of your car by more than a pound, so it
wouldn't really make a difference. Plus the helium would probably leak
out of your tires more quickly.
For every cubic meter of air replaced with helium you get a whopping 2
or so pounds of lift. The average car probably has about 2-4 cubic
meters of passenger and cargo space so again not a very appreciable
gain there. Think about how large the Goodyear blimp needs to be to
hold up that little passenger cabin.
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.
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.
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
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