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minin5742
@minin5742
July 2022
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Решение задач по физике
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botan55557
Могу только 31:
Дано:
R=10 Ом
U=220В.
m=1л=1кг
t1=20 градусов
c= 4200Дж/кг*С
______________
t-?
Решение:
1)Q=A=c*m*(t2-t1)
2)I=U/R
3)t=A/I*U
1)A=4200*1*(100-20)=336000Дж
2)I=220/10=22А
3)t=336000/22*220=~70с
Ответ: 70секунд
1 votes
Thanks 1
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Answers & Comments
Дано:
R=10 Ом
U=220В.
m=1л=1кг
t1=20 градусов
c= 4200Дж/кг*С
______________
t-?
Решение:
1)Q=A=c*m*(t2-t1)
2)I=U/R
3)t=A/I*U
1)A=4200*1*(100-20)=336000Дж
2)I=220/10=22А
3)t=336000/22*220=~70с
Ответ: 70секунд