Explain how the arrow on the dial will move if energy after the process is greater than before if the energy is less than before
Answers
Answer:
Unit 2: Energy Rules!
Section D. Energy Efficiency and the Second Law of Thermodynamics
The First Law of Thermodynamics states that energy can neither be created nor destroyed, it can only be converted from one form to another. This may suggest that we could always convert energy to whatever forms we need without ever worrying about using up our energy resources.
However, not all the energy is converted into the desired form of energy (such as light). Although the quantity of energy is the same before and after conversion, the quality is different. An incandescent light bulb has a thin wire filament mounted inside it. When the bulb is turned on, an electrical current passes through the filament, heating it up so much that it emits light. The thermal energy that is produced by the light bulb is often called wasted heat, because it is difficult to use this form of energy to do work.