A man consumes 50,000J of heat in doing his work out activities. A serving of his food provides him with 25,000J of energy. Interpret the energy values in terms of first law of thermodynamics.
The first law of thermodynamics, also known as the law of energy conservation, states that energy cannot be created or destroyed; it can only be transferred or transformed from one form to another. In the context of your question, let's interpret the energy values using this law.
The man consumes 50,000J of heat during his workout activities. Heat is a form of energy transfer, which means the man is actually receiving 50,000J of energy from his surroundings (such as the body's metabolization of food) to perform his workout.
On the other hand, a serving of his food provides him with 25,000J of energy. This means that when he eats one serving of food, his body absorbs 25,000J of energy from the food. This energy is then used by his body to perform various tasks, including the workout activities.
Therefore, according to the first law of thermodynamics, the man's body receives a total of 50,000J of energy from his surroundings to perform his workout, while the food he consumes provides 25,000J of energy. This implies that there might be additional sources of energy (such as stored energy within the body) that contribute to the remaining 25,000J of energy required for his workout activities, as energy is conserved throughout the process.