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Ответ

Ответ дан
ImperorII

Відповідь:

m₂=1,5кг

Пояснення:

Q₁=Q₂

Q₁=cm₁(t₁-t)

Q₂=cm₂(t-t₂)

cm₁(t₁-t)=cm₂(t-t₂)

m₁=m-m₂

(m-m₂)(t₁-t)=m₂(t-t₂)

m(t₁-t)=m₂(t₁-t₂)

m₂= m(t₁-t)/(t₁-t₂) = 1.5 кг

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