Question

a system inputs 100 units of energy and outputs 70 units of energy. where does the other 30 units of energy go? back into the system as water into the environment as heat, sound, or light into the environment as stored energy

Explanation:

In energy systems, energy is never created or destroyed (Law of Conservation of Energy), but it can be transformed or dissipated. When a system has energy input and less output, the "lost" energy (here 30 units) is typically dissipated into the environment as non - useful forms like heat, sound, or light. The option "back into the system as water" is incorrect as water is not a form of energy return in this context, and "into the environment as stored energy" is wrong because stored energy would still be part of the system's usable or storable energy, not the dissipated non - useful energy.

Answer:

B. into the environment as heat, sound, or light (assuming the second option is labeled B, if the original options had labels, adjust the label as per the original. If no labels, the correct option text is "into the environment as heat, sound, or light")