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

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Does long term silence or lack of speech (as some monks vow, for example) damage or atrophy the vocal chords or other means of speech?

2351 upvotes

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How big would a magnifying glass have to be to burn an ant with a full moon?

196 upvotes

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If airfoil-style wings function unidirectionally, how can airplanes fly upside down (and sideways)?

58 upvotes

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If time dilates relativistically around large masses, what does "seconds after the Big Bang" really mean? The Big Bang was a huge concentrated mass ... How did time pass amidst such a massive area?

57 upvotes

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Assuming the sun was the same intensity over time, would you get the same sunburn from a 2 hour continuous exposure as you would if you were in the sun for 5 minutes at a time, but still 2hours cumulatively?

10 upvotes

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Why do some many rocket launch systems use a combination of solid boosters and liquid rockets?

9 upvotes

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How long can a stable (non-radioactive) atom exist? Are they made of the same protons and neutrons as when they were created in a star?

5 upvotes

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Why do eggs, butter, and milk require refrigeration, but when combined and baked into bread, cake or cookies don't require refrigeration?

4 upvotes

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If a supernova results from a star burning through it's fuel, then how did the solar system form from the remnants of a supernova?

1 upvotes

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How does your stomach decide to burp or growl? Both events are a result of air in the stomach; why does it go further down the digestive tract sometimes (growl), and other times come back up (burp)? What is the mechanism that determines which way it goes?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Does long term silence or lack of speech (as some monks vow, for example) damage or atrophy the vocal chords or other means of speech?	2351
How big would a magnifying glass have to be to burn an ant with a full moon?	196
If airfoil-style wings function unidirectionally, how can airplanes fly upside down (and sideways)?	58
If time dilates relativistically around large masses, what does "seconds after the Big Bang" really mean? The Big Bang was a huge concentrated mass ... How did time pass amidst such a massive area?	57
Assuming the sun was the same intensity over time, would you get the same sunburn from a 2 hour continuous exposure as you would if you were in the sun for 5 minutes at a time, but still 2hours cumulatively?	10
Why do some many rocket launch systems use a combination of solid boosters and liquid rockets?	9
How long can a stable (non-radioactive) atom exist? Are they made of the same protons and neutrons as when they were created in a star?	5
Why do eggs, butter, and milk require refrigeration, but when combined and baked into bread, cake or cookies don't require refrigeration?	4
If a supernova results from a star burning through it's fuel, then how did the solar system form from the remnants of a supernova?	1
How does your stomach decide to burp or growl? Both events are a result of air in the stomach; why does it go further down the digestive tract sometimes (growl), and other times come back up (burp)? What is the mechanism that determines which way it goes?	1