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The seconds cross out, the kilograms cross out, one of the meters crosses out from the top, so we're left with an answer in meters.
秒消掉了，千克消掉了，单位米和上面的一起约去了，所以我们得到的答案只剩下米。
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0 And it has a mass of 9.11 times 10 to the minus 31 kilograms The charge compensation comes out of the nucleus with the proton and it is positive 1.6 times 10 to the minus 19 coulombs.
它的质量是9。11乘以0,到负31千克,电荷补偿来自于,有质子的原子核,它是+1。6*10^库伦。
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And during the siege there were sixty-five balloon flights carrying two and a half million letters, weighing a grand total of 10,000 kilograms, so roughly about 20,000 pounds.
在巴黎被围期间,共放出了六十五个热气球,带走了多达两百五十万封信,合计重量约有一万公斤,也就是两万磅左右
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Here is some object, it's 5 kilograms and I apply 10 Newtons.
这有一个物体,5 千克,我对它施加 10 牛的力
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We divide that by the mass, so 0.12 kilograms, that's the mass of a regulation baseball for the major leagues, and the velocity of the baseball is 42 meters per second. So, we can cross out our units doing our unit analysis.
我们用质量来除它，质量为0，12千克，这是大多数联赛规定的棒球质量,棒球的速度为42米每秒,所以，我们可以消去单位,来做单位分析。
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How do we know the mass of this is 5 kilograms?
我们怎么知道质量就是 5 千克呢
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A typical problem that you may have done in your first pass at Newton's law, someone tells you a force of 36 Newtons is acting on a mass of whatever, 4 kilograms; what's the acceleration?
在你们第一次接触牛顿定律时,可能见过这么一道典型题目,告诉你,一个 36 牛的力,作用在一个物体上,4 千克吧,问加速度是多少
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If you knew this was one kilogram, then the acceleration of the elephant, which will be some tiny number, maybe 100th of what this guy did; the mass of the elephant is then 100 kilograms.
如果已知这个物体的质量为 1 千克,那大象的加速度,会是一个比较小的数,可能是物体加速度的 1 / 100,大象的质量就是 100 千克
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Mass is measured in kilograms.
质量的单位是千克
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Most of chemistry has gone SI so every mass should be in kilograms.
大部分的化学遵守国际单位制,所以质量的单位应该是千克。
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1*10^-31kg This is 9.11 times 10 to the minus 31 kilograms.
若电子质量为9。
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