Why is it cooler around the edge of a bowl of soup then any place else?!
Answers: I've noticed that when you are eating soup, it is cooler around the edge of the bowl then any place else. Why?
You have to look at the thermodynamics of what is happening. The surface radiates heat and evaporates liquid, Per unit area of surface, this amount is a constant. You have to look at the volume under the surface. The larger the volume under the surface, the longer it takes to cool, so it follows that logically, the parts with the less volume under the surface will cool faster. At the edge of the bowl, there is less fluid and less heat available to keep the surface hot, so the bowl cools, mostly at the shallow end, and less at the deeper end because of the stored heat below the surface at any particular point.
its cooler around the edge of a bowl of coup then any place else because theres no soup there to heat it up!
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the hot soup is not touching the edge/top of the bowl.
obviously where the soup is in contact with the bowl it will be hotter
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is this a joke
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The bowl itself is cooler than the soup so if the contents of the soup make contact with it, they will cool off just like if you put ice into a drink, the ice is colder so the drink on the top or around the ice will be cooler since the ice will absorb the heat, just as the bowl absorbs the heat of the soup. The heat the bowl absorbs will be the soup it is in contact with, and the soup in the middle has no contact whereas the soup along the edge does, so the same degree the soup heats the bowl, it will cool by that amount in return. If you toss a frozen cube in the middle of the bowl of soup, the surrounding soup will be cooler than the soup that has no contact to the cold object, similar to the soup that is in contact with the bowl being cooler than the soup that does not have contact with it.
The heat from the soup is absorbed by the bowl at the edges, so it cools faster there. The bowl is usually a lot cooler than the soup, so it quickly absorbs that extra heat. It doesn't cool like that in the center of the bowl because it's far away from the edges.
Are you kidding me?