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

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If you pour a layer of oil on top of water in an open container, will it keep the water from evaporating?

530 upvotes

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Suppose I have a container of water with a ball floating on top of it. I put it outside overnight and the water freezes. Since the water's volume increases as it freezes, the ball is raised. Where does the increased gravitational potential energy come from?

155 upvotes

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Does irradiation of food for safety purposes affect nutritional content?

54 upvotes

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I was looking at an LED lighting catalog, and I noticed that a higher color rendering index seems to correspond to a lower efficiency. Is this coincidental, or is there some physical mechanism that causes a negative correlation?

20 upvotes

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Do individual winged insects (say dragonflies) of the same species have matching vasculature in their wings?

11 upvotes

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[Biology] Does human testicular volume change throughout adulthood?

10 upvotes

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What mechanism prevents hernias from healing on their own and necessitating surgery?

9 upvotes

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Why do certain beverages (e.g. milk, orange juice) cause excess mucus production in the mouth?

8 upvotes

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Is it possible to design acoustic "distributed-element filters" using a similar approach to that employed in the RF and Microwave electronic field?

7 upvotes

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Are certain locations on Earth more likely to be hit by meteorites than others or is the distribution essentially uniform?

7 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If you pour a layer of oil on top of water in an open container, will it keep the water from evaporating?	530
Suppose I have a container of water with a ball floating on top of it. I put it outside overnight and the water freezes. Since the water's volume increases as it freezes, the ball is raised. Where does the increased gravitational potential energy come from?	155
Does irradiation of food for safety purposes affect nutritional content?	54
I was looking at an LED lighting catalog, and I noticed that a higher color rendering index seems to correspond to a lower efficiency. Is this coincidental, or is there some physical mechanism that causes a negative correlation?	20
Do individual winged insects (say dragonflies) of the same species have matching vasculature in their wings?	11
[Biology] Does human testicular volume change throughout adulthood?	10
What mechanism prevents hernias from healing on their own and necessitating surgery?	9
Why do certain beverages (e.g. milk, orange juice) cause excess mucus production in the mouth?	8
Is it possible to design acoustic "distributed-element filters" using a similar approach to that employed in the RF and Microwave electronic field?	7
Are certain locations on Earth more likely to be hit by meteorites than others or is the distribution essentially uniform?	7