Explain that living systems obey the Law of Conservation of Mass and the Law of Conservation of Energy

Answer

Explanation:

The Law of Conservation of Mass states that mass/matter is neither created or destroyed during a chemical change.

It may change form but the total mass of all the parts will stay constant.

Example: If you burn a log of wood, the total mass of the inputs, including the log and atmospheric oxygen, will balance with the mass of the outputs, such as ashes, smoke, released gases, and water vapor.

the energy generated by an individual's metabolism is calculated in met (metabolic equivalent of task). the met is the ratio of the work metabolic rate to the resting metabolic rate. one met is illustrated as 1 kcal per kilogram per hour, and is probably equal to the energy cost of sitting quietly.

1 met is equal to 1.162 watt per kg

1 kg is equal to 1000 grams

as the person weighs 80000 gm, that is, 80 kg.

therefore, 80*1.162 = 92.96

thus, the person expends 92.96 watts of power while at rest.