/u/just_the_mann's posts in /r/askscience

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Theoretically, can you superimpose gravitational waves to manipulate their wavelength and amplitude; and furthermore, like electromagnetic waves, could these manipulations produce measurable effects?

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If we collected all the radioactive elements useful for generating nuclear power on Earth, how much energy could we generate with it? In terms of how long could it power a city?

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Could kinetic bombardment be used to plant research instruments into deep ocean trenches?

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Is it more expensive to bring something into orbit from the surface of the Earth, or from beyond-the-moon (maybe a chunk from the asteroid belt)?

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Is it possible to use centrifugal force to support a space elevator on the inner side of a tidally-locked planet?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Theoretically, can you superimpose gravitational waves to manipulate their wavelength and amplitude; and furthermore, like electromagnetic waves, could these manipulations produce measurable effects?	1
If we collected all the radioactive elements useful for generating nuclear power on Earth, how much energy could we generate with it? In terms of how long could it power a city?	1
Could kinetic bombardment be used to plant research instruments into deep ocean trenches?	1
Is it more expensive to bring something into orbit from the surface of the Earth, or from beyond-the-moon (maybe a chunk from the asteroid belt)?	1
Is it possible to use centrifugal force to support a space elevator on the inner side of a tidally-locked planet?	1