2 dP
C = ------ (partial differential)
dρ
如果上面畫的公式看不懂,可以參考
http://en.wikipedia.org/wiki/Speed_of_sound
P = 壓力 1
ρ = 密度 = --- (密度等於體積倒數)
V
但我實在想不出來這是怎麼推導出的
可以提示一下嗎?
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