gregcOr would the residual helium be extracted somehow, leaving a vacuum that is ready for the next load of helium? Would a tank car with a vacuum weight even less than helium?
I'm sure that the evacuated car would weigh less than the car with residual helium - helium does have weight.
Kinda goes back to the thing with feathers and vacuums - in a true vacuum, a feather will fall at the same rate as a brick.
As noted in the link I found, the difference in weight between a full and empty container is minimal - for the car shown I found a couple of guesstimates at 1600 and 1860 pounds of helium in a loaded car.
While looking for information on helium I ran across a comment that a scuba diving tank that is full will sink, while an empty one will float - the weight of the compressed air being the difference.
Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it...
Tree,
I learned something - I did not know that about scuba tanks.
Bob
BOB WITHORNI did not know that about scuba tanks.
Neither did I...
Many years ago while driving a tractor/trailer I had a 40' load of 4 big pieces of foam rubber; filled the box from floor to roof. Weight was under 200 lbs but it took up the whole Trailer.
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