Draw a labelled diagram of a thermos flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.

The temperature of a body rises by 1°C. What is the corresponding rise on the:

(a) Fahrenheit scale

(b) Kelvin scale?

Convert 5°F to the Celsius scale.

Convert 40°C to the:

(a) Fahrenheit scale

(b) Kelvin scale