Question

Luke investigated the heating of water. He predicted that the rise in temperature would

depend on the volume of water.
The diagram shows the apparatus he used.

a. Why did Luke need to know the temperature of the water at the beginning and at the
end of the experiment?

Answer 1

Step-by-step explanation:

When Luke stirs the water, the particles from bottom to top and vice-versa, and hence the heat is transferred to all the water molecules.

The mode of transfer of heat here is convection.

When he stirs water then the water molecules from the top ( away from the flame ) travel to the bottom ( towards the flame ) and hence water gets heated uniformly leading to a good observation.

Due to uniform heating of water which leads to good observations.