askscience

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If riding on a full bus is more energy efficient than driving alone in a car, and that driving alone in a car is more energy efficient than riding alone on an empty bus, where is the crossover point when the number of bus passengers is the same efficiency as a single-rider car?	19
When a star explodes, could it push its planets out of its gravity well (i.e., send them wandering)?	13
Would ice melt faster in a dark cola left in the sun than in a clear cola in the sun?	9
If you die from starvation after W weeks, how long can you live if you eat every W-1 weeks?	9
Is there any kind of dream analysis that is derived from scientific studies rather than just mumbo-jumbo?	8
If you transmuted pure water into wine, how much fusion and fission energy would be released converting Oxygen from the water into the atoms composing the organic and other molecules needed for wine?	8
Very Large Array [see text for view from satellite] - is there any specific advantage to non-linearly distributed telescopes? (xpost from /r/astronomy)	7
The expansion of the universe is accelerating and eventually some galaxies will be receding from us (redshifted) at greater the speed of light, making them undetectable. If gravity interacts at the speed of light, does that mean gravity also be "redshifted" away from detection?	7
If you had a model of how your eye imperfectly lenses (e.g., astigmatism), could a display (or font) be "pre-anti-blurred" so that after your eye blurs it, it looks normal (and crisp)?	7
If we had an LHC equivalent in space, could its beam be useful than anything other than particle science? E.g., a beam weapon for spaceships, or a particle beam that slices through asteroids for mining	6

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