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[請益] 熱力學第二定律題目 解法爭議
[ Physics ]18 留言, 推噓總分: 0
作者: nerv3890 - 發表於 2010/01/12 23:04(14年前)
3Fnerv3890:噢 14996忘了改 他有式子是錯的01/12 23:31
4Fnerv3890:= n*Cv*δ(P*V)/(P*V) + n*R*δV/V01/12 23:32
5Fnerv3890:14996後來將R帶換成Cp後來求證是不用用R就好,搜哩疏忽了01/12 23:32
6Fnerv3890:所以14996出來的答案會是2.5*ln(2)01/12 23:33
7Fnerv3890:更正 2.5R*ln(2)01/12 23:33
14Fnerv3890:懂了!!!感恩!!01/12 23:57
15Fnerv3890:原來都是我在搞怪 = ="01/12 23:57
Re: [題目] 簡諧運動
[ Physics ]4 留言, 推噓總分: +2
作者: kramnik - 發表於 2010/01/12 12:33(14年前)
1Fnerv3890:k大 那個倒數第4行 那個A是什麼 Q___Q01/12 23:05
[問題] 如何投出在籃框上一直旋轉的球
[ Physics ]8 留言, 推噓總分: +8
作者: breakdown56 - 發表於 2010/01/11 21:24(14年前)
1Fnerv3890:櫻木花道表示:01/11 21:25
Re: [題目] 熱力學第二定律
[ Physics ]26 留言, 推噓總分: +10
作者: kramnik - 發表於 2010/01/11 20:55(14年前)
1Fnerv3890:你好猛 感恩 :DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD01/11 20:57
2Fnerv3890:這跟hank大說的做法一樣 但我駑鈍所以當時不懂 =v=01/11 20:57
3Fnerv3890:感恩感恩01/11 20:57
6Fnerv3890:不過有個疑問01/11 21:20
7Fnerv3890:理想氣體 Cv = (3/2)*R = 12.5 J/(mol*K) 才對 ???01/11 21:20
8Fnerv3890:Cp = (5/2)*R 是 k大疏忽還是我搞錯阿 > <"01/11 21:21
10Fnerv3890:搜哩再一問 R是怎麼變成Cp的呢? 感恩01/11 21:35
17Fnerv3890:恩 是Cp=Cv+R 所以得到R之後不用帶換吧??01/12 00:28
18Fnerv3890:我是指這兩個步驟的帶換01/12 00:29
19Fnerv3890:= n*Cv*δ(P*V)/(P*V) + n*R*δV/V01/12 00:29
20Fnerv3890:= n*Cv*(δP/P) + n*Cp*(δV/V)01/12 00:29
21Fnerv3890:這樣看是Cp直接取代了R 所以應該是不用換 用R及可???01/12 00:29
22Fnerv3890:感謝大家討論跟回答 :DDDD01/12 00:29
Re: [題目] 熱力學第二定律
[ Physics ]7 留言, 推噓總分: +2
作者: nerv3890 - 發表於 2010/01/11 20:07(14年前)
3Fnerv3890:不懂 Q___Q01/11 20:19
4Fnerv3890:ntu可以大概講解下嗎 > < or 你的做法01/11 20:21
5Fnerv3890:感恩01/11 20:21
[題目] 熱力學第二定律
[ Physics ]4 留言, 推噓總分: 0
作者: nerv3890 - 發表於 2010/01/11 18:04(14年前)
4Fnerv3890:樓上謝謝你 我懂了!!!:DDD01/11 18:23
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