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  • Stage 1

    Answer 6 questions correctly in a row.

Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over
5
.
BatteryInitial temperature
(
°C
)
Final temperature
(
°C
)
Battery in the less expensive phone3626
Battery in the more expensive phone3628
During this time, thermal energy was transferred from 
the surroundings

 to 
the surroundings

.
ref_doc_title.

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