What is the task described in the 'Course of work' section?

The task is to measure the specific heat capacity of a 5-gram copper coin. To determine the heat capacity of the coin, you need to pour hot water into the calorimeter and then transfer the coin several times from a container of cold water into the calorimeter and back. The amount of heat transferred by the coin in one go is too small to notice a change in the water temperature in the calorimeter. The formula in this case will look like this:

Results should be entered in the third row of the table. Comparing with the tabular data, make a hypothesis about the material of the coin.