Найти кпд латунной кастрюли с водой. кастрюлю вскипятили.
vводы = 10л
m кастрюли = 500г
v кастрюли = 2л
qдров = 1*10^7 дж/кг
c воды = 4200 дж/кг*c
c латуни = 4200 дж/кс*c
t начальная воды = 20c
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02.10.2019 11:04
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Відповідь:
Пояснення:
η= Q/Qдров
Q = Q1+Q2
Q1= cвmв(t-t1)
Q2= cлmл(t-t1)
η= (cвmв+cлmл)*(t-t1)/Qдр