d. Four machines which do not require electricity to work
Answers
Answered by
1
Answer:
Explanation:
Gravity lamp.
Pedal-powered washer/dryer.
Radiational-cooling refrigerator.
Non-electric computers.
Electricity generating smartphone case.
Answered by
0
Answer:
Gravity lamp.
Pedal-powered washer/dryer.
Radiational-cooling refrigerator.
Non-electric computers.
Electricity generating smartphone case.
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