An aluminum bar suspended on a spring balance was immersed in the liquid; when the bar was completely immersed
| September 22, 2021 | education
An aluminum bar suspended on a spring balance was immersed in the liquid; when the bar was completely immersed, the reading of the balance decreased by 26%. What kind of liquid could it be?
To find the type of liquid in which the considered aluminum bar was immersed, we use the formula: Fa = 0.26Р (the Archimedes force is equal to the change in the weight of the aluminum bar).
Fa = 0.26Р.
ρх * g * V = 0.26 * m * g.
ρх * g * V = 0.26 * ρa * V * g.
ρх = 0.26 * ρa.
Constants: ρa is the density of aluminum (ρa = 2700 kg / m3).
Calculation: ρх = 0.26 * ρa = 0.26 * 2700 = 702 kg / m3 (corresponds to the density of gasoline at 20 ºС, ρb = 680 – 800 kg / m3).
Answer: The aluminum bar could be immersed in gasoline.
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