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So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.
如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。
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But time is ticking away and you're afraid that you might miss your movie.
时间一分一秒地过去了，你开始担心要错过电影的开场。
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So, we know this point at one second is 20 meters, so let's just ask one other question and we'll stop.
我们知道该物体上升一秒后到达二十米处,关于这个模型的最后一个问题
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Occasionally, you'll find you need to cancel out units, because, of course, you're always doing unit analysis as you solve your problems, and sometimes you'll need to convert joules to kilogram meters square per second squared.
偶然地，你会发现需要消除单位，因为在解题时,经常要做单位分析，所以有时候需要把,焦耳换做,一千克乘以米的平方除以秒的平方。
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John Landy Six weeks later, John Landy, the Australian runner, runs the mile in 3 minutes 57.9 seconds.
六周后，澳大利亚跑手，一英里跑了三分57。9秒。
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> Once we changes phases, realize that a whole lot more was happening on the next screen.
>一旦我们有所改变，下一秒就会发生许多,翻天覆地的变化。
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That there'd be no way at all to tell whether I've survived from one minute to the next, ? from one hour to the next?
我们完全无法知道,下一秒,下一个小时，我是否活着？
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Light travels basically a foot in a nanosecond. Simple rule of thumb.
光行进的速度是每纳秒一英尺,很简单的经验法则了。
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You see somebody for about a second, you could make a guess.
你看对方一秒，就能猜到了。
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Then he had a machine that granted each pigeon one piece of corn every fifteen seconds; that's very, frustratingly slow for a hungry pigeon to get one piece every fifteen seconds.
他们设计了一个能保证,每隔15秒给鸽子喂一玉米粒的装置,对饥饿的鸽子来说是杯水车薪,每15秒才只有一粒玉米
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Haze poked his toe in his side, and he wheezed for a second and then was quiet. "Two things I can't stand," Haze said, "a man that ain't true, and one that mocks what is. You shouldn't ever have tampered with me if you didn't want what you got."
海斯把他的脚放在他身边，他喘息了一秒,之后便静了下来，海斯说，有两件事是我所不能忍受的，不诚实的人，嘲笑他人的人，你本不该,碰我的东西，如果你不想要得到什么“
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And...so those issues added up is a democratic context which you can't be certain of what the policies will be, so all of these make it sort of somewhat trickier than a place like China.
所以，所有因素加起来,就造成了投资者的困惑,你无法确定,下一秒会出台什么政策,这就使得在印度投资比在中国,这样的国家来说棘手多了。
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If it takes you 1 / 60 of a second to go around once, then you do it 60 times a second.
如果转一圈要 1 / 60 秒,那么一秒就转了60圈
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So we know that it'll go up for one second then it will turn around and come back.
我们知道了,物体在上升一秒后开始下降
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A joule is a kilogram meter squared per second squared.
一个焦耳等于,一千克乘以米的平方除以秒的平方。
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Just like one second is some convention we use and one meter is some convention we use.
就像一秒是我们预先约定的,一米也是我们预先约定的
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And runners proved the doctors and scientists-- proved that they were right and ran the mile in two seconds and 4 minutes, one second, but no runner could run the mile in under 4 minutes, ever since the mile was actually timed-- when they started to time runs.
跑手们证明了医生和科学家…,证明了他们是对的,一英里跑四分钟两秒，四分钟一秒，但没有跑手能少于四分钟，从一英里跑计时以来-,当人们开始计时跑时。
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Here, in one second, it seems to have gone much further, so it's probably traveling faster.
在这一秒内,它似乎运动了更远的距离,所以这段时间它可能运动得更快
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For example, here, in one second it went from here to here.
例如,在一秒内它从这儿运动到这儿
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So, why should a non-frightening incongruity cause people to make a distinctive loud noise consisted of staccato segments of one fifteenth of a second each separated by a fifth of a second?
为什么不引起恐惧的不一致性,会让人们发出一种与别不同的声音,而且这种声音是间断的，一节声音持续15分之一秒,两节声音之间也是相隔15分之一秒？
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What it means is if you'd release a rock at that location one second before with a certain speed that we can calculate, it would've ended up here with precisely the position and velocity it had at the beginning of our experiment.
它的意义在于,若在该处以特定速度抛出一个物体,这个速度可通过计算得到,一秒之后,物体会运动至我们设定的起点,并且速度为我们设定的初速度
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Also, what's the energy per photon of this red laser pointer, and then it's also worth trying a calculation dealing with intensity. So let's also try calculating the numbers of photons that would be emitted by this laser pointer, if, for example, we were to use it for 60 seconds and this were a one milliwatt laser.
同样，红色激光笔的,每个光子能量是多少，这也值得用处理强度的方法计算一下,让我们也计算一下,有多少光子会从这个激光笔射出，举个例子，如果我们使用它持续60秒,这里会有一毫瓦的激光。
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When t is equal to 10,000 years or 10,000 seconds, you're going to find y is some huge negative number.
当t为一万年或一万秒时,我们得到y是一个极大的负数
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Frequencies, how many times you go around, f is revolutions per second It's called the angle of velocity.
频率就是一秒转多少圈,因为 f 是每秒转过的圈数,这就是角速度
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The one thing you want to keep in mind though is that Hertz does not actually mean inverse seconds, it means cycles per second. So, if you're talking about a car going so many meters per second, you can't say it's going meter Hertz, you have to say meters per second.
写成5每秒，或5赫兹,你们要记住的是赫兹,并不等于秒的倒数，它是每秒的循环数，如果你们说,一辆车一秒可以走多少米,你不能说它走了米赫兹。
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You just need about a second.
你只需要大约一秒。
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If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.
如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上
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Now, the nanosecond is what, 10 to the minus 9 seconds.
一纳秒就是10的9次方分之一秒，而这个电脑一秒可以做2G次运算。
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