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

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Could we build a pendulum long enough that its period was 12 hours or 24 hours? What is the limit?

123 upvotes

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A study by Hans Einberg concluded that all blue-eyed people originated from one person in the Mediterranean. How did that get determined, and are there any credible doubts about that conclusion?

16 upvotes

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Since lasers exist for light, is there such a thing as a focused beam of sound?

13 upvotes

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How do lumens work? if I have two light bulbs, each rated at 5,000 lumens, do they produce together the same lumens as one 10,000 lumen bulb?

12 upvotes

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How does increased carbon in the atmosphere affect the nutritional value of food crops?

6 upvotes

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As Baby Boomers age and pass away, they will occupy fewer houses. Does that mean house prices will fall in the future since there will be more empty homes for sale?

1 upvotes

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What would be the "nutrition facts" on a human being (if a large animal were to eat one)?

1 upvotes

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If a free ISP were to offer the vast internet for free but only in grayscale, how much less bandwidth would its users consume?

1 upvotes

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What difference in bandwidth usage would there be between a full HD video and the same video in grayscale?

1 upvotes

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300 years ago, what available material might one have used to produce a ping pong ball that would play reasonably similar to a modern one?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Could we build a pendulum long enough that its period was 12 hours or 24 hours? What is the limit?	123
A study by Hans Einberg concluded that all blue-eyed people originated from one person in the Mediterranean. How did that get determined, and are there any credible doubts about that conclusion?	16
Since lasers exist for light, is there such a thing as a focused beam of sound?	13
How do lumens work? if I have two light bulbs, each rated at 5,000 lumens, do they produce together the same lumens as one 10,000 lumen bulb?	12
How does increased carbon in the atmosphere affect the nutritional value of food crops?	6
As Baby Boomers age and pass away, they will occupy fewer houses. Does that mean house prices will fall in the future since there will be more empty homes for sale?	1
What would be the "nutrition facts" on a human being (if a large animal were to eat one)?	1
If a free ISP were to offer the vast internet for free but only in grayscale, how much less bandwidth would its users consume?	1
What difference in bandwidth usage would there be between a full HD video and the same video in grayscale?	1
300 years ago, what available material might one have used to produce a ping pong ball that would play reasonably similar to a modern one?	1