/u/SlateAlmond90's posts in /r/askscience

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If an animal has a high hearing frequency, can they hear from farther distances?

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If a volcanic ash cloud reaches the stratosphere, how far of an area would it cover? And how would it effect human, animal, and plant life if the ash cloud didn't start to dissipate until after 3-4 years?

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In a story where a vampire's hearing is x20 better than that of a humans, would the decibels be multiplied or the distance from which you hear the sound?

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If someone can hear a conversation clearly from 20 meters away, it it because they have a sensitive hearing or an extended range of frequencies?

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If a person were capable of running at a speed of 600 miles per hour, would they appear as a blur?

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Does an object appear faster when moving towards, away, or perpendicular to you?

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Hypothetically, if someone had super speed, how fast could they run before they or their clothes caught fire?

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If the average person has 20/20 vision, would a character who has vision that is 20x better be 400/20, 20/400, 0/400, or 400/0?

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If a volcanic ash cloud reaches the stratosphere, how far of an area would it cover? And how would it effect human, animal, and plant life if the ash cloud didn't start to dissipate until after 3-4 years? (P.S. Please explain it like I'm 5. I got these fancy words from the internet.)

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What if humans had 600 million rods and 30 million cones in their eyes?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If an animal has a high hearing frequency, can they hear from farther distances?	7
If a volcanic ash cloud reaches the stratosphere, how far of an area would it cover? And how would it effect human, animal, and plant life if the ash cloud didn't start to dissipate until after 3-4 years?	1
In a story where a vampire's hearing is x20 better than that of a humans, would the decibels be multiplied or the distance from which you hear the sound?	1
If someone can hear a conversation clearly from 20 meters away, it it because they have a sensitive hearing or an extended range of frequencies?	1
If a person were capable of running at a speed of 600 miles per hour, would they appear as a blur?	1
Does an object appear faster when moving towards, away, or perpendicular to you?	1
Hypothetically, if someone had super speed, how fast could they run before they or their clothes caught fire?	1
If the average person has 20/20 vision, would a character who has vision that is 20x better be 400/20, 20/400, 0/400, or 400/0?	1
If a volcanic ash cloud reaches the stratosphere, how far of an area would it cover? And how would it effect human, animal, and plant life if the ash cloud didn't start to dissipate until after 3-4 years? (P.S. Please explain it like I'm 5. I got these fancy words from the internet.)	1
What if humans had 600 million rods and 30 million cones in their eyes?	1