標題: [Physic試題] (heat) [打印本頁]

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作者: FreedomJustice    時間: 2006-10-28 05:24 PM     標題: [Physic試題] (heat)

Water is used as coolant in motor car engines because
A:water has a low specific heat capacity
B:water has a hight specific heat capacity
C:water has a low specific latent heat of vaporization
D:water has a low specific latent heat of vaporization
wht is the ans

[ 本帖最後由 鍾倩怡 於 2006-11-10 11:06 PM 編輯 ]

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作者: ~樂~    時間: 2006-11-1 07:56 PM

b..in fact its very easy

firstly 一定唔係c同d 因為設計者唔會想d水係架車入面boiling 而且係現實都係唔會
then a同b choose一

一定係b....因為e=mc (delta)t
c(即係specific heat capacity)大ge話呢 佢就可以吸得多熱 而水溫唔升得好高

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作者: FreedomJustice    時間: 2006-11-1 09:02 PM

thx for your hlep

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