請問Physic點用Propotion計算溫度？

2011-03-27 3:29 am

請問

T= 0。C ，L= 5.0 cm
T= 100。C ，L= 25.0 cm

係暖水裏面，L=13.0 cm ，咁佢個溫度系幾多？
Calculate by * Propotion *

請問以Propotion應該點計算同埋用propotion 計算，個原理係咩？有咩定義？

多謝！！！！

回答 (1)

天同

2011-03-27 8:23 pm

✔ 最佳答案

The concept behind is that the increase in length of the liquid column is assumed to be proportional to the increase in temperature. That is to say, the increase in length of liquid column per unit drgree rise of temperature is constant.

Using this concept, you only needs to find the proportional constant of "increase in length per degree rise in temperature".Change in length = (25 - 5) cm = 20 cmChange in temperature = 100'CHence, proportional constant = 20/100 cm/'C = 0.2 cm/'C

The change in length when the liquid column is 13 cm= (13 - 5) cm = 8 cm
Hence, temperature = 8 /0.2 'C = 40'C

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