Can one distinguish between the internal energy of a body acquired by het transfer and that acquired by the performance of work on it by an etenal agent ?

Explanation

To determine whether one can distinguish between the internal energy of a body acquired by heat transfer and that acquired by the performance of work on it by an external agent, we can follow these steps:

### Step 1: Understand the First Law of Thermodynamics
The first law of thermodynamics states that the change in internal energy (ΔU) of a system is equal to the heat added to the system (ΔQ) minus the work done by the system (ΔW):
\[ \Delta U = \Delta Q - \Delta W \]

### Step 2: Identify the Sources of Internal Energy Change
Internal energy can increase due to:
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