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c1=2200 J/(kg*K)
c2=880 J/(kg*K)
Q1=Q2
Δt1=Δt2
Szukane:
m1/m2
Q1= m1c1Δt
Q2= m2c2Δt
Q1=Q2
m1c1Δt = m2c2Δt
m2/m1 = c1/c2
m2/m1 = 2200/880 = 2,5
Odp. Masa piasku jest 2,5 raza większa od masy cyny.