Tolong bantu di jawabdan jelaskan rumusnya​

Penjelasan:

Diketahui:

P in = 125 watt

t = 2 menit = 2×60 = 120s

W = 9,6 kJ = 9600 J

Ditanya:

efisiensi alat tersebut, n =?

Jawab:

P out = W/t = 9600 / 120 = 80 watt

n = P out/ P in × 100%

= 80/125 × 100%

= 64%