Heat questions | form five Physics

Give the evidence for the validity of the first law of  thermodynamics.

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UNSOLVED

(i)Based on Wien`s displacement law, what would happen on a black body when constantly heated?
(ii) Estimate the rise in temperature of the gas if 60 Joule is supplied to 2 moles of helium gas placed inside an insulated container of a fixed volume.

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Why is it preferred to purchase a cooking utensil of low specific heat capacity?

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How does a fish survive in a pond during an extreme winter season even if the pond is deep frozen on the surface?

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UNSOLVED

The ice on a pond is 10 mm thick. If the temperature above and below its surface are 263 K and 273 K respectively; calculate the rate of heat transfer through the ice.

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UNSOLVED