/u/KosherNazi's posts in /r/askscience
Is it possible to print an image with a "resolution" so high that using a magnifying glass will reveal further detail? i.e., zooming in over a physical map of the USA could let you see roads, buildings, etc.
215 upvotes
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If I installed a small inline turbine at the entrance of the municipal water supply to my home, how much energy could I generate?
201 upvotes
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If you followed a supersonic aircraft right in its trailing shockwave, what would you hear? A loud roar? Repeated "booms"? Nothing?
12 upvotes
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How much energy does it take for the body to replace a quart of blood? OR, can regularly donating blood require a measurable increase in caloric intake?
3 upvotes
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What is the metabolic cost of producing 1 pint of blood in the body? How much energy does this represent in terms of caloric intake?
2 upvotes
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If FTL travel were possible, and someone flew 2000 lightyears away, then turned and looked back at the earth, how big of a telescope would they need to "see" the surface, and watch Romans wandering around in the Forum?
1 upvotes
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