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

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Why do "mineral sunscreens" (titanium oxide, zinc oxide) become transparent when they are "rubbed in" to the skin?

95 upvotes

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What percentage of an airplane's sound comes from the gas engine? Would an electric plane be significantly quieter, or would the aerodynamics of flight necessitate a loud aircraft?

3 upvotes

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Why do microwaves tend to heat beverages unevenly?

1 upvotes

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What causes moss to out-compete algae?

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Are the raw food movement's claims about enzymes founded?

1 upvotes

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Why does yeast fermented with ammonium carbonate (fly bait) smell so so so bad?

1 upvotes

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What is the reaction that causes old urine to smell bad?

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The American tall grass prairie was an "inland see" of flowers and grass 6-8ft tall. Are there still spots that bloom with an ocean of flowers taller than a person? Most images I've seen seem to be shorter than I'm imagining.

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do "mineral sunscreens" (titanium oxide, zinc oxide) become transparent when they are "rubbed in" to the skin?	95
What percentage of an airplane's sound comes from the gas engine? Would an electric plane be significantly quieter, or would the aerodynamics of flight necessitate a loud aircraft?	3
Why do microwaves tend to heat beverages unevenly?	1
What causes moss to out-compete algae?	1
Are the raw food movement's claims about enzymes founded?	1
Why does yeast fermented with ammonium carbonate (fly bait) smell so so so bad?	1
What is the reaction that causes old urine to smell bad?	1
The American tall grass prairie was an "inland see" of flowers and grass 6-8ft tall. Are there still spots that bloom with an ocean of flowers taller than a person? Most images I've seen seem to be shorter than I'm imagining.	1