A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
A) conduction and convection only B) conduction and radiation only C) convection and radiation only D) conduction, convection and radiation
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Answer:
A) Conduction and Convection
Explanation:
The heat may be losen by the cup via metal, this is conduction
Similarly as Vapours are given out, the air exposed to coffee gets affected and again coffee loses heat ultimately
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Answer:
here is your answer
option D) conduction, convention and radiation
Explanation:
Part of the heat is conducted away by the metal table. Convection currents in air near the surface of the coffee are set up which accounts for some heat loss. Heat is also lost by radiation from the hot coffee to the surroundings. Most of the heat is lost by the last method.
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