when we heat milk , why does it raise up??Is it convection??plzz explain me convectionI promise the first one to answer my question will be marked as brainlist
Answers
Answer:
Milk rises when boiled because about 80% of it is water
Explanation:
https://www.bing.com/videos/search?q=Convection&&view=detail&mid=1F08FE02EF393BDD86131F08FE02EF393BDD8613&&FORM=VRDGAR&ru=%2Fvideos%2Fsearch%3Fq%3DConvection%26FORM%3DHDRSC4
Explanation:
The answer to both questions is convective currents or convection.
When milk is heated from below, the hotter milk particles rise to the top of the liquid because they become lighter. Then the milk which is colder on top due to its higher density goes down. This form of heating liquids is called convection. When boiling point of milk (at the atmospheric pressure) is reached the water particles in milk take heat from the neighbouring molecules and escape in to the air. So the cooled milk particles from near the open surface go down to the bottom. This process appears ebullient very vigorously at the boiling point.
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Do you mean overflow over from the top of the utensil to outside.?
Certain dissolved substances in milk come out as gas on heating of milk. The gases coming out from inside the milk, lift the creamy layer on top of the milk air boundary. The creamy layer on top of the milk is formed by the fats inside the milk. The gases coming out of milk expand due to heat and so lift the creamy layer. Milk bubbles formed due to surface tension are able to rise to the brim of the utensil.
Hope it helps!!