Heat questions | form five Physics

A black ball of radius 1 m is maintained at a temperature of 30°​ C ​ . How much heat is radiated by the ball in 4 seconds?

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UNSOLVED

(i) Give a common example of adiabatic process.
(ii) What happens to the internal energy of a gas during adiabatic expansion?

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UNSOLVED

A mass of an ideal gas of volume 400cm​ ³ at 288K expands adiabatically. If its temperature falls to 273K;
(i) Find the new volume of the gas.
(ii) Calculate the final volume of the gas if it is then compressed isothermally until the pressure returns to its original value.

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UNSOLVED

State the following according to heat exchange:
(i) Prevost`s theory.
(ii) Wien`s displacement law.

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UNSOLVED

Briefly explain why;
(i) Steam pipes are wrapped with insulating materials?

(ii) Stainless steel cooking pans fitted with extra copper at the bottom are more preferred?

Answer / Solution

UNSOLVED