/r/askscience

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What is the ISS minimal crew?

5229 upvotes • Tartiflesh

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I don’t understand how AC electricity can make an arc. If AC electricity if just electrons oscillating, how are they jumping a gap? And where would they go to anyway if it just jump to a wire?

5226 upvotes • Flipdip35

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Why are diabetics considered to be at higher risk of death from COVID_19?

5225 upvotes • BadassSteve2

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I've heard that the surface of a fast spinning neutron star(pulsar) rotates at about 5th the speed of light with respect to the centre. If so, then would the periphery experience Lorentz contraction? How would it affect the structure of the star?

5223 upvotes • tralfamadelorean31

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What in physics is fundamental?

5220 upvotes • mrlicciardi

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What would happen to me, and everything around me, if a black hole the size of a coin instantly appeared?

5216 upvotes • ontheverge73

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What is the physiological difference between the tiredness that comes from too little sleep and the tiredness that comes from exertion?

5214 upvotes • uencos

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If fizzy drinks were made with another gas besides CO2 like argon or helium etc, how would the drinks taste different?

5212 upvotes • oppleTANK

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What happens to your body when you are knocked out with a punch?

5212 upvotes • [deleted]

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From how high up can you dive before water may as well be concrete?

5210 upvotes • RikuAotsuki

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
What is the ISS minimal crew?	5229	Tartiflesh
I don’t understand how AC electricity can make an arc. If AC electricity if just electrons oscillating, how are they jumping a gap? And where would they go to anyway if it just jump to a wire?	5226	Flipdip35
Why are diabetics considered to be at higher risk of death from COVID_19?	5225	BadassSteve2
I've heard that the surface of a fast spinning neutron star(pulsar) rotates at about 5th the speed of light with respect to the centre. If so, then would the periphery experience Lorentz contraction? How would it affect the structure of the star?	5223	tralfamadelorean31
What in physics is fundamental?	5220	mrlicciardi
What would happen to me, and everything around me, if a black hole the size of a coin instantly appeared?	5216	ontheverge73
What is the physiological difference between the tiredness that comes from too little sleep and the tiredness that comes from exertion?	5214	uencos
If fizzy drinks were made with another gas besides CO2 like argon or helium etc, how would the drinks taste different?	5212	oppleTANK
What happens to your body when you are knocked out with a punch?	5212	[deleted]
From how high up can you dive before water may as well be concrete?	5210	RikuAotsuki