E=mc2的系数问题俺还是没明白。
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送交者: Amsel 于 2007-09-13, 14:39:02:
能量的单位是这样来的
1 J = 1 N.m = 1 kg m/s2 m
如果改成厘米克秒制,那个公式岂不就成了
E=1/100 m c^2
其中E以尔格为单位、m以克为单位,美感大大降低了。
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你念过大学物理吗? (无内容)
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你太有才了
(0 bytes)
2007-09-13, 15:07:41
(170261)
大学物理没讲这个更根本的问题:
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Amsel
(54 bytes)
2007-09-13, 15:12:00
(170269)
俺现在明白了。既然k=1,剩下的就能导出了。
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Amsel
(136 bytes)
2007-09-13, 15:20:05
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There is nothing wrong with tht
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赤城
(137 bytes)
2007-09-13, 14:57:55
(170257)
我只是说我不明白--先别说英制单位,化成厘米克秒制就出了这个百分之一的系数了。
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Amsel
(20 bytes)
2007-09-13, 15:01:01
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as I said, m is defined as E/c^2, it has nothing to do with units (无内容)
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008
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2007-09-13, 14:43:56
(170244)
no no - check wiki for "fundamental dimensions"
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meiyou
(206 bytes)
2007-09-13, 14:56:37
(170255)
I don't think wiki can tell you what mass is (无内容)
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008
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2007-09-13, 14:59:52
(170258)
kg is a fundamental not derived unit as you suggested
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meiyou
(203 bytes)
2007-09-13, 15:18:57
(170278)
不同意。m的单位是目前是由千克原器来的,c是实测的,E的单位是导出的。 (无内容)
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Amsel
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2007-09-13, 14:48:02
(170249)
这个公式速度用的米秒质量用公斤能量用焦耳 (无内容)
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HunHunSheng
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2007-09-13, 15:11:58
(170268)
how many people here think m is "mass"? and what is mass? (无内容)
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008
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2007-09-13, 14:56:59
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Becoming philosophical. "Mass" is "out of mind" (无内容)
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赤城
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2007-09-13, 15:08:15
(170262)
Mass is a physical quantity, has nothing to do with philosophy. (无内容)
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008
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2007-09-13, 15:09:56
(170265)
Think again. (无内容)
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赤城
(0 bytes)
2007-09-13, 15:11:03
(170267)
It thinked again and again, still believe philosophy is just a pile of ... (无内容)
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008
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2007-09-13, 15:15:31
(170273)
Congratulations! The same conclusion reached by Richard Feynman years ago. (无内容)
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赤城
(0 bytes)
2007-09-13, 15:20:25
(170280)
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