PHY問題求教 [復制鏈接]

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係唔係D ?

young modulus = F/A /   dl / l

A=(1.56 x 10^-10 )^2

F = 4.8 x 10^-10

dl = 0.04 x 10^-10

l = 1.56 x 10^-10

young modulus ~ 7.6923 x 10^11 = D

唔知有冇計錯

引用第2樓BVEsun於2011-03-19 23:19發表的“”:
young modulus = F/A /   dl / l
A=(1.56 x 10^-10 )^2
F = 4.8 x 10^-10
.......

岩
原來係咁樣既...
用一粒atom去計

e.. young modulus個unit唔係Nm-2咩

已經唔記得晒d野 只係記得young modulus呢個term

中間條直線obey hooke's law , so slope = force constant = 120

有條式係 young modulus = k/r , where r is eqm distance (1.56)

計出黎 E=7.69*10^11

引用第5樓ab34於2011-03-20 17:25發表的“”:
已經唔記得晒d野 [表情] 只係記得young modulus呢個term

+1

引用第6樓sheva於2011-03-20 17:46發表的“”:
中間條直線obey hooke's law , so slope = force constant = 120
有條式係 young modulus = k/r , where r is eqm distance (1.56)
計出黎 E=7.69*10^11

原來有這個方法計

引用第8樓BVEsun於2011-03-20 18:23發表的“”:
[表情] [表情]
.......

書寫架咋

你地咁都記得, 好勁

引用第6樓sheva於2011-03-20 17:46發表的“”:
中間條直線obey hooke's law , so slope = force constant = 120
有條式係 young modulus = k/r , where r is eqm distance (1.56)
計出黎 E=7.69*10^11

引用第6樓sheva於2011-03-20 17:46發表的“”:
中間條直線obey hooke's law , so slope = force constant = 120
有條式係 young modulus = k/r , where r is eqm distance (1.56)
計出黎 E=7.69*10^11

犀利