Final answer:
Energy may appear to be lost but is actually transformed into other forms. Equation 8-3 accounts for all forms of energy.
Step-by-step explanation:
The conservation of energy holds true even if energy appears to be lost. When we say energy is lost, we are referring to energy being transformed into forms that we cannot effectively use or measure, such as thermal energy or sound energy. However, this energy is not truly lost but is still present in the system.
Equation 8-3, also known as the conservation of energy equation, accounts for all the different forms of energy in a system and ensures that the total energy before a process is equal to the total energy after the process.