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加了一题新的physic问题，在第7楼。请帮帮忙。。。
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发表于 1-8-2010 11:47 AM
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回复 Lov瑜瑜4ever
Okay, two tips for you:
1. understand what is potential energy.
2. ho ...
数学系 发表于 1-8-2010 11:28 AM 
我看了书
书也没说很多
potential energy就是mgh...>< |
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发表于 1-8-2010 11:49 AM
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回复 17# Lov瑜瑜4ever
W = PV is a formula in thermodynamic, if I remember correctly.... |
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发表于 1-8-2010 11:50 AM
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回复 Lov瑜瑜4ever
W = PV is a formula in thermodynamic, if I remember correctly....
数学系 发表于 1-8-2010 11:49 AM
也就是说这个公式知可以用在气体做功咯？ |
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发表于 1-8-2010 11:54 AM
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水从底下喷上去的时候应该也是要经过10m的空间才可以把那个圆柱体充满
那为什么就可以因为point of mass是在5m的地方就不用10m了呢？ |
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发表于 1-8-2010 11:55 AM
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To #21 and #22
1. It is difficult to draw the diagram here to illustrate the solution, and so I leave this problem for others to help me to clarify.
2. We are now discussing the water tank problem, don't diverse our focus. We can discuss W = PV in the topic thermodynamic next time. |
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发表于 1-8-2010 11:58 AM
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回复 24# Lov瑜瑜4ever
Good question. But you can refer to 十九楼 for my explanation. |
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发表于 1-8-2010 12:30 PM
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To #21 and #22
1. It is difficult to draw the diagram here to illustrate the solution, and so I l ...
数学系 发表于 1-8-2010 11:55 AM
可以的话
请给我你的msn
msn即时聊天那边是可以画东西出来的。。。 |
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发表于 1-8-2010 07:09 PM
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