The weight of an aluminum washer with a volume of 50 cm 3 decreased by 0.38 N when immersed

The weight of an aluminum washer with a volume of 50 cm 3 decreased by 0.38 N when immersed in a liquid. What is this liquid?

To find out the type of liquid into which the taken aluminum washer was immersed, we use the formula: FA = ΔP = ρx * g * V, from where we can express: ρx = ΔP / (g * V).

Const: g – acceleration due to gravity (approx. G ≈ 10 m / s2).

Data: ΔP – weight reduction of the taken aluminum washer (ΔP = 0.38 N); V is the volume of the washer (V = 50 cm3 = 5 * 10 ^ -5 m3).

Let’s calculate: ρx = ΔP / (g * V) = 0.38 / (10 * 5 * 10 ^ -5) = 760 kg / m3 (corresponds to the density of gasoline (ρb = 680 – 800 kg / m3) and the density of oil ( ρн = 730 – 940 kg / m3)).

Answer: The taken aluminum washer was immersed in gasoline (oil).