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A rechargeable battery initially stores 3.6 kJ of chemical energy. Anna puts the battery in a flashlight, where 2.1 kJ of energy are transformed into light and heat. Then, Anna puts the battery in a charger, where 6.8 kJ of electrical energy are transformed into chemical energy. How much chemical energy is now stored in the battery?
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A rechargeable battery initially stores 3.6 kJ of chemical energy. Anna puts the battery in a flashl...
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