Question

1. the vacuum between the walls in a thermos flask minimize heat loss by _________.
2. Aluminum expands _______ than iron.
3. Choose the correct answer: -
a) We cannot use mercury thermometers at the place like
i)London
ii)New York
iii)North pole
iv)None of these
(follow)
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Answer 1

Answer:

1. conduction or convection

2. more than 1.6

3. North pole

Explanation:

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