/u/Paiste402's posts in /r/askscience

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When you get rubbing alcohol or disinfectant into an open wound and it stings what exactly is happening to cause this pain?

1559 upvotes

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Is it possible to calculate the speed of the engine components themselves ie pistons in kph/mph?

64 upvotes

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Say I run a bath, and it's very hot. At first the water is painful but slowly becomes comfortable but any areas that not have been exposed to the hot water are still painful. What is happening for water to feel like it has changed temperature?

4 upvotes

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Why do humans have different blood types?

3 upvotes

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My red brake light had faded perfectly clear, where has the red pigment actually gone for this to happen?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
When you get rubbing alcohol or disinfectant into an open wound and it stings what exactly is happening to cause this pain?	1559
Is it possible to calculate the speed of the engine components themselves ie pistons in kph/mph?	64
Say I run a bath, and it's very hot. At first the water is painful but slowly becomes comfortable but any areas that not have been exposed to the hot water are still painful. What is happening for water to feel like it has changed temperature?	4
Why do humans have different blood types?	3
My red brake light had faded perfectly clear, where has the red pigment actually gone for this to happen?	1