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A thermos flask contains coffee. It is s...

A thermos flask contains coffee. It is shaken vigorously. (i) Has any heat been added to it.
(ii) Has any work been done on it.
(iii) Does it internal energy change?
(iv) Does its temp. rise?

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To solve the question step by step, we will analyze each part separately. ### Step 1: Has any heat been added to it? The thermos flask is insulated, which means it is designed to minimize heat transfer between the contents and the external environment. Since there is no heat exchange with the surroundings, we can conclude that: - **Answer:** No heat has been added to the coffee in the thermos flask. ### Step 2: Has any work been done on it? When the coffee is shaken vigorously, work is done against the viscous forces present in the liquid. The act of shaking the coffee requires energy to overcome these forces. Therefore: ...
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