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例:一支刻度均匀的水银温度计,插入标准大气压下的沸水中,水银柱长为 L_1;插入标准大气压下的冰水混合物中,水银柱长为 L_2,若插入标准气压下某液体中,水银柱长为 L_3,那么该液体的实际温度是多少?分析和解:标准大气压下沸水的温度为100℃;冰水混合的温度为0℃.根据温度计的制作原理可知:水银柱的伸长跟温度成正比,若设温度为自变量 x,水银柱的长度为函数 y,于是 y=kx+b
Example: A uniform mercury thermometer with a uniform scale inserted into boiling water under standard atmospheric pressure. The length of the mercury column is L_1. When inserted into a mixture of ice and water under standard atmospheric pressure, the length of the mercury column is L_2. If inserted into a liquid under standard pressure, mercury is used. Column length L_3, then the actual temperature of the liquid? Analysis and reconciliation: standard atmospheric pressure boiling water temperature is 100 °C; ice and water mixing temperature of 0 °C. According to the principle of the thermometer production knows: mercury column elongation and temperature In proportion, if the temperature is set as the independent variable x, the length of the mercury column is the function y, so y=kx+b