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原题:在同一教室内的三支温度计,把它们分别放在空气中,放在装有酒精的开口烧杯中和插入密封的酒精瓶中,如下图所示,其读数都是20℃,你将如何判断出哪支温度计不准确? 原解:(3)中的酒精被密封着,不会蒸发,因而瓶内酒精的温度和室温一样,(1)、(3)中温度计示数都是20℃,所以这两支温度计的刻度应该是正确的,而(2)中的酒精是放在开口的烧杯中,它要从周围物体中吸收热量而使酒精的温度下降,一定要低于20℃的室温,而(2)中的温度计的示数仍是20℃,所
The original title: Three thermometers in the same classroom, placed in the air, placed in open beakers filled with alcohol and inserted into sealed alcohol bottles, as shown in the figure below, the readings are 20 °C, you How will I tell which thermometer is inaccurate? Original solution: The alcohol in (3) is sealed and does not evaporate. Therefore, the temperature of the alcohol in the bottle is the same as the room temperature, and the thermometers in (1) and (3) are all 20 °C, so the scale of the two thermometers should be correct, and the alcohol in (2) is placed in an open beaker. It absorbs heat from the surrounding objects and causes the temperature of the alcohol to drop. Be sure to be less than 20 Room temperature of °C, while the number of thermometers in (2) is still 20 °C.