Whilst it’s still cold working from home, I’ll often use a hot water bottle to keep warm. I’m often curious if it’s better to fill it more or less and whether it makes any difference to the bottle staying warm. In consistent and matching conditions, would it make any difference how much water was put in the bottle, and why?
In: Chemistry
To help understand it, imagine putting just a tiny bit of water in there. A thimble full of water would not even make the bag hot. A shot glass of water would be a little warm but only for a minute.
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