|MadSci Network: Physics|
Here's my question: I'm writing a science fiction story. In it, there's a device that uses vacuum to lift things. (In the story, it's used to rescue a marooned astronaut.) My idea is that it's spherical, sort of like a helium balloon but with rigid walls. It's dropped to the planet surface in a colapsed state, then inflated, as it inflates the walls become rigid, then the air is pumped out to create a vacuum. My questions are: 1. Would this work? Can a vacuum be used to lift things? 2. How much does a cubic foot of earth air weigh? 3. How much air would have to be displaced to lift 100 pounds?
Re: Using a vacuum to lift things
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