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

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How do you know if a volcano that hasn't erupted in hundreds of years is dormant vs. if it's extinct?

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How much of the human body could be replaced with robotics and the human still be alive?

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Will a high speed wind (e.g. 60 MPH) have a greater effect on a stationary vehicle or on one traveling crosswise to the wind?

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If brainwaves at max concentration are operating around 40Hz, how do we process sound and light that operate at much higher frequencies?

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If you switched off gravity for only ten seconds, would everything fall back to earth when it was switched back on or would it all be flung too far out into space?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How do you know if a volcano that hasn't erupted in hundreds of years is dormant vs. if it's extinct?	2
How much of the human body could be replaced with robotics and the human still be alive?	1
Will a high speed wind (e.g. 60 MPH) have a greater effect on a stationary vehicle or on one traveling crosswise to the wind?	1
If brainwaves at max concentration are operating around 40Hz, how do we process sound and light that operate at much higher frequencies?	1
If you switched off gravity for only ten seconds, would everything fall back to earth when it was switched back on or would it all be flung too far out into space?	0