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

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Is it possible to bring water to a boil by any other source of energy besides direct heat?

17 upvotes

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Is it actually possible to estimate the amount of grains of sand on every beach? If not, is it only theoretical that there are more stars in the universe than grains of sand on the earth?

2 upvotes

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Do we truly have an understanding of the universe on such a scale that we can accurately tell the age of the cosmos? Or is most of this stuff just theoretical guesses?

1 upvotes

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If the earth's gravity became 50% less than what it is now. Would an average male in good shape remain in the same shape doing the same routine with the 50% more gravity?

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What is the brain doing when you're reading, watching tv, or listening to the radio and you unknowingly "space out"?

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What is preventing jumbo jets from having a parachute system in case of catastrophic engine failure?

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Is it possible to break in pool and get the same ball placements if the rack and the shot were under the exact same conditions each time?

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Will there ever be a plateau of technology in the modern era?

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What can we do to be better and safer drivers on the road?

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Okay, so I'm working a late shift into the morning hours. I feel pretty good all the way until I get home and relax. I get sleepy pretty quickly afterwards. Why is this?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is it possible to bring water to a boil by any other source of energy besides direct heat?	17
Is it actually possible to estimate the amount of grains of sand on every beach? If not, is it only theoretical that there are more stars in the universe than grains of sand on the earth?	2
Do we truly have an understanding of the universe on such a scale that we can accurately tell the age of the cosmos? Or is most of this stuff just theoretical guesses?	1
If the earth's gravity became 50% less than what it is now. Would an average male in good shape remain in the same shape doing the same routine with the 50% more gravity?	1
What is the brain doing when you're reading, watching tv, or listening to the radio and you unknowingly "space out"?	1
What is preventing jumbo jets from having a parachute system in case of catastrophic engine failure?	1
Is it possible to break in pool and get the same ball placements if the rack and the shot were under the exact same conditions each time?	1
Will there ever be a plateau of technology in the modern era?	1
What can we do to be better and safer drivers on the road?	1
Okay, so I'm working a late shift into the morning hours. I feel pretty good all the way until I get home and relax. I get sleepy pretty quickly afterwards. Why is this?	1