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

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How does swinging their arms help propel a runner? Wouldn't it be canceled out by the other arm swinging backwards? (Conservation of momentum)

14 upvotes

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Does the human body expend energy whilst standing up? (apart from the energy used to keep organs functioning)

5 upvotes

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How do virtual particles "know" when other particles are nearby?

2 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How does swinging their arms help propel a runner? Wouldn't it be canceled out by the other arm swinging backwards? (Conservation of momentum)	14
Does the human body expend energy whilst standing up? (apart from the energy used to keep organs functioning)	5
How do virtual particles "know" when other particles are nearby?	2