Energy transfer involves the transformation of energy from one form to another.
The question is incomplete as the lab details were not attached but I will educate you about energy transfer. Recall that according to the first law of thermodynamics, energy is neither created nor destroyed but can be transformed from one form to another.
For instance, when we connect a light bulb to a battery, there is a transformation of the chemical energy in the battery to the heat and light energy of of the light bulb.
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