Объяснение:
Q=cm(t2-t1)=4200*3*(77-100)=
=12600*(-23)=289800Dj=289,8kDj
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Объяснение:
Q=cm(t2-t1)=4200*3*(77-100)=
=12600*(-23)=289800Dj=289,8kDj