/u/deep_sea2's posts in /r/askscience

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Have there been any studies that examine if self-service checkouts increase customer purchases and thus increase revenue?

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When I empty a milk jug, and then leave it on the counter, the air pressure inside increases. Why?

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Has the development of global communication (email, cell phones, skype, etc.) been positive or negative with regards to those that spend a lot of time away from home (military, sailors, etc.)?

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Can water freeze at negative windchill temperature?

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If the Earth became tidally locked with the sun, how hot would the sun facing side become, and how cold would the dark side be?

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Is exercise and physical activity actually good for your body?

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What would the economical speed of a spaceship be when you take time dilation into account?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Have there been any studies that examine if self-service checkouts increase customer purchases and thus increase revenue?	4
When I empty a milk jug, and then leave it on the counter, the air pressure inside increases. Why?	1
Has the development of global communication (email, cell phones, skype, etc.) been positive or negative with regards to those that spend a lot of time away from home (military, sailors, etc.)?	1
Can water freeze at negative windchill temperature?	1
If the Earth became tidally locked with the sun, how hot would the sun facing side become, and how cold would the dark side be?	1
Is exercise and physical activity actually good for your body?	0
What would the economical speed of a spaceship be when you take time dilation into account?	0