Heat questions | form five Physics

The value of the property X of a certain substance is given by;
X​ _θ = X​ _σ 0.5θ + 2 × 10​ ^-4​ θ​ ^2​ , Where θ is the temperature in degrees celsius. What would be the celsius temperature defined by the property X which corresponds to a temperature of 50°C on
this gas thermometer scale?

Answer / Solution

UNSOLVED

Briefly explain why:
(i) A body with large reflectivity is a poor emitter.
(ii) The earth without its atmosphere would be too cold to live.

Answer / Solution

UNSOLVED

Identify two factors on which the coefficient of thermal conductivity of a material depends.

Answer / Solution

UNSOLVED

A brass boiler of base area 1.50×10​ ^-1​ m ² ​ and thickness of 1.0​ cm boils water at the rate of 6.0​ kg ​ /min when placed on a gas stove. Estimate the temperature of the part of the flame in
contact with the boiler.

Answer / Solution

UNSOLVED

Briefly describe the working principle of a thermocouple.

Answer / Solution

UNSOLVED