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在涉及浮力的计算问题中,常能遇到题述物所处状态不明确,而隐藏在题目条件中的情形的问题.对这类问题,抓住题目所给条件,对物体状态进行分析、确认,使之显性化,往往是解题的关键和突破口.例1 把一蜡块(ρ_蜡=0.9g/cm~3)放入装满酒精的容器中,从中溢出酒精4g(ρ_(酒精)=0.8g/cm~3),将该蜡块放入装满水的容器中时,则溢出水的质量是
In the computational problems involving buoyancy, it is often the case that the state in which the subject is in question is not clear but is hidden in the subject condition. For such questions, the condition given by the subject is grasped, the state of the object is analyzed, Confirmation, making it obvious, is often the key to solve the problem and breakthroughs. Example 1 Put a wax block (ρ_wax = 0.9g/cm~3) into a container filled with alcohol, from which spilled alcohol 4g (ρ_ (alcohol) = 0.8g/cm~3). When the wax block is placed in a container filled with water, the quality of the spilled water is