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The student wants to specify how the salt enables energy storage. Which choice most effectively uses relevant information from the notes to accomplish this goal?

25 Mar

The student wants to specify how the salt enables energy storage. Which choice most effectively uses relevant information from the notes to accomplish this goal?

While researching a topic, a student has taken the following notes:

  • Scientists have developed a “freeze-thaw” battery that can retain 92% of its charge after twelve weeks.
  • The battery contains molten salt (a type of salt that liquefies when heated and solidifies at room temperature).
  • When the salt is in a liquid state, energy flows through the battery.
  • When the salt is in a solid state, energy stops flowing and is stored in the battery.
  • The stored (frozen) energy can be used by reheating (thawing) the battery.

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