A copper cylinder weighing 3.56 kg is immersed in gasoline. Determine the weight of the cylinder in gasoline.

Problem data: m (mass of the considered copper cylinder) = 3.56 kg.

Reference values: g (acceleration due to gravity) ≈ 10 m / s2; ρb (gasoline density) = 710 kg / m3; ρm (copper density) = 8900 kg / m3.

The weight of the considered copper cylinder in gasoline is determined by the formula: P = Fт – Fa = m * g – ρb * g * V = m * g – ρb * g * m / ρm = m * g * (1 – ρb / ρm).

Let’s calculate: P = 3.56 * 10 * (1 – 700/8900) = 32.8 N.

Answer: The weight of the considered copper cylinder in gasoline will be 32.8 N.