載入中...
相關課程

登入觀看
⇐ Use this menu to view and help create subtitles for this video in many different languages.
You'll probably want to hide YouTube's captions if using these subtitles.
Scale of the Small : From honey bees to cells, virus, and atoms -- understanding the scale of the very small
相關課程
0 / 750
- What I want to do in this video is
- explore what happens when we get to
- really, really, really small scales.
- Before we even think about it,
- I want to familiarize ourselves
- with the units here.
- So, we're all familiar with what a meter looks like
- (the average adult male is a little under 2 meters).
- If you were to divide a meter into a thousand units,
- you would get a millimeter.
- I think we probably know what a millimeter is
- if you've ever looked at a meter stick
- it's the smallest measurement on that meter stick,
- so it's already pretty hard to look at.
- Now if you were to divide each of those millimeters into a thousand sections,
- you'd get a micrometer,
- or another way to think about a micrometer
- is [that] it's one millionth of a meter,
- so this is kind of beyond
- what we're capable of really perceiving.
- If you were to take each of those micrometers
- and divide them into a thousand sections,
- you would get a nanometer,
- so now we're one billionth of a meter.
- [If] you divide that by a thousand,
- a picometer, so a picometer is
- one thousand billionth of a meter,
- or you could say a trillionth of a meter.
- You divide one of those by a thousand
- and you would get a femtometer,
- so these are unimaginably small things.
- Now once you're familiar with the units,
- let's explore what types of things we can
- expect to find at these different scales.
- And I'll start over here,
- and I've written them on the left as well,
- but it's more compelling when you see the pictures.
- We'll start over here with the bee
- and I've arbitrarily picked something of this scale,
- there's many, many, many, [an] almost infinite
- number of things I could've picked at this scale.
- But the average bee is about 2 centimeters long
- (this bee right over here)
- it's about, give or take, one hundredth
留言:
新增一則留言(尚未登入)

初次見面
好像又更了解你一點了
要常常來找我玩喔!
(1/3) (2/3) (3/3)
我是均一小學的課程管家梨梨,會挑選最適合你的內容,讓梨梨更了解你吧!
你對哪些內容感興趣呢?(可複選)