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Mathematics, 27.04.2021 18:30 djs1002
Um motor elétrico recebe 2.800 kJ de energia elétrica. Transforma 900 kJ em energia térmica, 150.000 J em energia sonora e o restante em energia cinética. Podemos afirmar que seu rendimento é de: *
a) 62,5 %
b) 68,7 %
c) 70,4 %
d) 72,7 %
e) 92,3 %
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Um motor elétrico recebe 2.800 kJ de energia elétrica. Transforma 900 kJ em energia térmica, 150.000...
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