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And we want to divide all of that by our wavelength, and to keep our units the same we'll do meters.
我们想用波长除以所有这些，而且保持单位统一我们采用米。
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A lot of times we talk about these kind of distances either in nanometers or in angstroms so we can say this is 70 angstroms.
我们在讨论此类的距离时,很多都用到纳米和埃米的单位,所以它的波长是70埃米。
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Now, of course, we've got to have units and the units for lengths are going to be meters.
当然,这里还得有单位,长度的单位是"米"
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If the units are supposed to come out in meters per second and you get seconds per meter, what do you figure the chances of that problem being right are?
因为如果单位本应该是米每秒,但你写的是秒每米，你认为这个题目,还有正确的机会吗？
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If the units come out in meters per second, you will quickly discover that the problems in 3.091 are just not that complicated.
如果你的单位是米每秒，你会很快发现,在3。091中的题目并不复杂。
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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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So, the way to measure force is in kilogram meters per second squared.
所以,力的单位是千克米每秒平方
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I like the angstrom. It is 10 to the minus 10 meters.
我喜欢单位，埃，它等于10的负10次方米。
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I agree, but I want the speed in meters per second.
我同意,但我希望速度以米每秒为单位
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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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So, we can just plug it in. Speed is equal to the distance traveled, which is lambda over the time elapsed, which is 1 over nu. so, we can re-write that as speed is equal to lambda nu times nu, and it turns out typically this is reported in meters per second or nanometers per second.
经过的距离和所花的时间,我们把它们带进来,速度等于经过的距离,也即是lambda除以,所花的时间,通常它的单位,是米每秒或者纳米每秒。
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Acceleration is measured in meters per second squared.
加速度的单位是米每秒平方
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