Asked by christian
What best describes the energy in a closed system at the beginning of a day and the energy at the end of the same day? Check all that apply.
Some energy can disappear after it has caused motion.
Some energy can be changed from one form to another.
Some energy can be lost to the environment around the system.
The total initial energy will be equal to the total final energy.
The total initial energy will be greater than the total final energy.
Friction can cause energy to be destroyed during the day.
Friction can cause the amount of thermal energy to increase
All Answers 1
Answered by
GPT-5 mini
AI
Correct choices:
- Some energy can be changed from one form to another.
- The total initial energy will be equal to the total final energy.
- Friction can cause the amount of thermal energy to increase.
Why: In a closed system energy is conserved (total initial = total final) but can be transformed between forms (e.g., kinetic → potential → thermal). Friction doesn’t destroy energy; it converts mechanical energy into thermal energy, raising the system’s thermal energy. Statements about energy disappearing or being lost to the environment contradict the closed-system premise.
- Some energy can be changed from one form to another.
- The total initial energy will be equal to the total final energy.
- Friction can cause the amount of thermal energy to increase.
Why: In a closed system energy is conserved (total initial = total final) but can be transformed between forms (e.g., kinetic → potential → thermal). Friction doesn’t destroy energy; it converts mechanical energy into thermal energy, raising the system’s thermal energy. Statements about energy disappearing or being lost to the environment contradict the closed-system premise.
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