Describe how heat will flow between Part A and Part B
when the tap is opened. Draw
an arrow to illustrate the
direction of heat flow.

Explanation:

When you bring two objects of different temperature together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, i.e. until their temperatures are equal. We say that heat flows from the hotter to the cooler object.

answer; benefit; harmed;