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In the experiment of measuring the liquid density, a student lost the step of measuring the mass of the cup in advance, but it measured the volume of the liquid twice and the total mass of the liquid and the measuring cup Liquid and measuring cup mass g liquid volume cm square The first time 21.4 16.5 The second time 39.9 35.0
In the experiment of measuring the liquid density, a student lost the step of measuring the mass of the cup in advance, but it measured the volume of the liquid twice and the total mass of the liquid and the measuring cup
Liquid and measuring cup mass g liquid volume cm square
The first time 21.4 16.5
The second time 39.9 35.0
Let the cup mass be mo
m1-mo=ρV1
m2-mo=ρV2
The difference between the two formulas is as follows
(m2-m1)=ρ(V2-V1)
The solution is as follows
ρ=(m2-m1)/(V2-V1)
=(39.9-21.4)/(35-16.5)
=18.5/18.5
=1g/cm³
=1.0*10³Kg/m³
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