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art2131
@art2131
August 2022
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Решите 25 номер , подробно плиз
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MashaPutnaj
Verified answer
Дано КПД=0,9 m=3 кг t1=19C t2=100C t=900 с U=220 В I- ?
КПД= Qп*100%/Qз
0,9*U*I*t=c*m*(t2-t1)
I=c*m*(t2-t1)/0,9*U*t=4200*3*81/0,9*220*900=4200*3/2200=5,73 А
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Answers & Comments
Verified answer
Дано КПД=0,9 m=3 кг t1=19C t2=100C t=900 с U=220 В I- ?КПД= Qп*100%/Qз
0,9*U*I*t=c*m*(t2-t1)
I=c*m*(t2-t1)/0,9*U*t=4200*3*81/0,9*220*900=4200*3/2200=5,73 А