Heat questions | form five Physics

A person sitting on a bench on a calm hot summer day is aware of a cool breeze blowing from the sea. Briefly explain why there is a natural convection?

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UNSOLVED

A Nichrome-constantan thermocouple gives about 70µV for each 1°C difference in temperature between the junction. If 100 such thermocouples are made into a thermopile, what voltage is produced when the junctions are at 20°C and 240°C?

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UNSOLVED

A black body of temperature is places in a blackened enclosure maintained at a temperature of 10°C. When its temperature rises to 30°C the net rate of loss of energy from the body was found to be 10watts. Find the power generated by the body at 50°C of the energy exchange takes place solely by the process of forced convection.

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UNSOLVED

Compare the law governing the conduction of heat and electricity pointing out the corresponding quantities in each case.

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UNSOLVED

Write down three laws governing the black body radiation.

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UNSOLVED