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Thermal Physics

Blazing goIITian

Joined:	6 Sep 2007
Post:	956

29 Mar 2008 10:22:12 IST

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398

try dis

None

How can you best use a spoon to cool a cup of coffee? Stirring?which involves doing work.
Would it seem to heat the coffee rather than cooling it?

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Comments (4)

Tanmay

Blazing goIITian

Joined: 6 Sep 2007

Posts: 956

29 Mar 2008 10:31:11 IST

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ne1?

siddharth raghuraman

Cool goIITian

Joined: 28 Dec 2007

Posts: 76

29 Mar 2008 10:34:38 IST

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i don thnk so..coz wen u stir it the aparent surface area of the cofy increases (as it forms a kind of whirlpool with a kinda cone shaped air space in the middle) hence heat radiated increases...and besides if u take ideal conditions, use a stainless steel spoon and as it is a good conductor of heat, it will absorb heat whch wil b desipated by ur hand...its jus wat im thnking.

Tanmay

Blazing goIITian

Joined: 6 Sep 2007

Posts: 956

30 Mar 2008 10:21:29 IST

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