Mathematics, 04.12.2020 19:00, nsalhady1721

- Circle the letter of the sentence that explains why no machine is 100 percent efficient a. Electrical energy is converted to mechanical energy by fuel. b. Mechanical energy is converted to thermal energy by friction C. Thermal energy is converted to mechanical energy by friction. d. Mechanical energy is converted to electrical energy by a spark

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- Circle the letter of the sentence that explains why no machine is 100 percent efficient a. Electri...