In a laboratory, since Anushka has not got laboratory thermometer to determine the boiling point of a liquid, she used a clinical thermometer. Will she be able to measure temperature correctly? Explain.

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

a) Describe briefly how heat is transferred:

i) From gas burner to water.

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

a) Describe briefly how heat is transferred:

ii) Spread through water in the utensil.

A utensil, which is made of thick copper base, is placed on the gas burner to heat up water in it.

Explain why water would boil faster when a lid is placed on the utensil.

Observe the given diagram of a thermometer. The distance between $-{10}^{\mathrm{o}} \mathrm{C}$ and the ${110}^{\mathrm{o}} \mathrm{C}$ markings is $25 \mathrm{cm}$. If the length of the mercury thread is $15 \mathrm{cm}$ as shown in the figure, calculate the temperature measured by this thermometer.