一條F.3 Phy 問題 10分考試用!!

2012-12-29 10:09 pm
A pair of metallic chopsticks feels colder than a pair of wodden chopsticks, even they are at the same temperature. Which of the following is/are possible reasons?

1.Metal are better conductors of heat.
2.Mass of the metallic chopsticks is larger.
3.The heat capacity of the metallic chopsticks is higher.

我想問答案係唔係2 and 3 ?
更新1:

有人話1同3先對. 可唔可以EXPLAIN 下 WHY 1 係對?謝

回答 (3)

2012-12-29 11:00 pm
✔ 最佳答案
1 對。因為金屬是熱的良好導體﹐你身體內的熱會傳給金屬﹐因此你會覺得金屬會較木筷冰涼

2 不對。金屬筷子的質量與熱傳導率(thermal conductivity)無關

3 金屬筷子的比熬容量高只表示需要更多的熱令金屬筷子升高1度﹐也與熱傳導率無關
2012-12-29 11:53 pm
myisland8132正解,只有(1)是對的,(3)是錯的!另外類似(1)這題考試幾乎必出...
2012-12-29 10:41 pm
2唔啱,1,3都啱!!!!!!!!!!1


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