Answers

2014-04-30T11:21:44+05:30
Milk is an emulsion of an aqueous product (whey) and a non-aqueous product (curds). They will eventually separate, with the cream rising to the top due to it's lighter density. Heating it just speeds up the separation.
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2014-04-30T11:28:06+05:30
Because when the temperature is raised the high temprature seperates the creamy part of the milk from the rest of it; just like the effect of when oil and water is mixed together.
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