/u/3MGJohn's posts in /r/askscience

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How can we tell whether a galaxy it tinted red due to redshift, or just naturally having a red glow?

2128 upvotes

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If dopamine is released into our brains when we eat foods we like, what is released when we eat foods we think taste bad?

96 upvotes

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why does the delta baryon Δ0 have more mass than a neutron even though they are made up of the same thing?

11 upvotes

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My water bottle says "Purified by reverse osmosis." What exactly does this mean and how does it purify water?

9 upvotes

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Does helium have a negative weight?

3 upvotes

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What is the difference between regular copper cables and cables that are used to carry data like ethernet cables?

1 upvotes

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Is there any relatively easy way to melt tin coating off iron?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How can we tell whether a galaxy it tinted red due to redshift, or just naturally having a red glow?	2128
If dopamine is released into our brains when we eat foods we like, what is released when we eat foods we think taste bad?	96
why does the delta baryon Δ0 have more mass than a neutron even though they are made up of the same thing?	11
My water bottle says "Purified by reverse osmosis." What exactly does this mean and how does it purify water?	9
Does helium have a negative weight?	3
What is the difference between regular copper cables and cables that are used to carry data like ethernet cables?	1
Is there any relatively easy way to melt tin coating off iron?	1