Question

К коромыслу весов подвешены два алюминиевых цилиндра одинакового объема. Нарушится ли равновесие весов,если один цилиндр погрузить в воду,другой-в спирт?Ответ обоснуйте.Зависит выталкивающая сила от плотности жидкости

Answer 1

выталкивающая сила зависит от плотности жидкости и объема тела Fa=pж*Vт*g

плотность воды 1000кг\м3, спирта-790кг\м3. значит выталкивающая сила в воде будет больше и равновесие весов нарушится

Answer 2

Analysis of the Situation

When two aluminum cylinders of the same volume are suspended from the arms of a balance, the equilibrium will be disturbed if one cylinder is submerged in water and the other in alcohol. This is due to the difference in the buoyant force exerted by the two liquids on the cylinders. The buoyant force is dependent on the density of the liquid, and since water and alcohol have different densities, the buoyant forces they exert will also differ.

Effect of Liquid Density on Buoyant Force

The buoyant force exerted on an object submerged in a fluid is directly proportional to the density of the fluid. This means that the denser the fluid, the greater the buoyant force it exerts on the submerged object. Conversely, a less dense fluid exerts a smaller buoyant force.

Specifics of the Scenario

1. Water: Water has a density of approximately 1000 kg/m³ at room temperature. 2. Alcohol: The density of alcohol varies depending on the type, but for the purpose of this scenario, we can consider the density of ethanol, which is approximately 789 kg/m³ at room temperature.

Conclusion

Given that water is denser than alcohol, the aluminum cylinder submerged in water will experience a greater buoyant force compared to the one submerged in alcohol. This difference in buoyant forces will cause the equilibrium of the balance to be disturbed, leading to an imbalance.

Therefore, the equilibrium of the balance will be disturbed if one aluminum cylinder is submerged in water and the other in alcohol due to the difference in the buoyant forces exerted by the two liquids.

I hope this explanation helps! If you have further questions or need additional clarification, feel free to ask.