A three-liter jar is filled with engine oil, and a half-liter can is filled with glycerin.

| September 25, 2021 | education

A three-liter jar is filled with engine oil, and a half-liter can is filled with glycerin. What liquid mass is greater and how many times?

From the condition of the problem it is known that a three-liter can is filled with machine oil, which means that the volume of the first liquid is V1 = 3 liters = 0.003 cubic meters. m. From the reference tables we find the density of the engine oil: ρ1 = 910 kg / cu. m, the mass of engine oil is found by the formula m1 = ρ1 ∙ V1. A half-liter jar is filled with glycerin, which means that the volume of the second liquid is V2 = 0.5 l = 0.0005 cubic meters. m. From the reference tables we find the density of glycerin: ρ2 = 1260 kg / cu. m, the mass of glycerin is found by the formula m2 = ρ2 ∙ V2. to determine the mass of which liquid is greater and by how many times, we find the ratio: m1: m2 = (ρ1 ∙ V1): (ρ2 ∙ V2). Substitute the values ​​of physical quantities into the formula and calculate: m1: m2 = (910 ∙ 0.003): (1260 ∙ 0.0005) = 2.73: 0.63 ≈ 4.3.
Answer: The mass of engine oil is 4.3 times more.



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