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[공통] 1. 소방원론 02강(p16~20)_연소, 연소의 형태 문제풀이

[공통] 1. 소방원론 02강(p16~20)_연소, 연소의 형태 문제풀이

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00:00:02

Hello, Dasan's representative vein is cold.

00:00:05

When we live our daily lives or use engineering expressions, we

00:00:10

talk about very small numbers by adding a prefix in front of them.

00:00:16

For example, the same goes for our weight. The unit is g, but usually

00:00:21

we also write kg on the page,

00:00:24

and then we also use mg.

00:00:29

Usually, when we use the unit of length, it is m, but

00:00:32

here we also write km. We also use the word millimeter. Like this,

00:00:39

when we go into the front of a fence, we

00:00:43

now call it the fold.

00:00:45

Depending on the standard of measurement, there are several types of fold, and we

00:00:49

now call it the si. As for the ones in the back, let's take a look at

00:00:53

some of the representative prefixes used here, so

00:00:59

let's take a look at this with me.

00:01:02

Here, I've drawn the order of the numbers all the way down to 1. By the ear of this standard, it's

00:01:06

usually a number greater than 1, followed by this below. has been prepared with numbers smaller than 1.

00:01:13

When you see a number larger than 1, it represents 10 times and then 100 times.

00:01:17

There are things like kafacto, but in reality, these are

00:01:21

not often used in our daily lives. Books in physics and engineering are

00:01:26

not used that much either.

00:01:28

So I'll jump in a little bit and explain these two starting from number 2.

00:01:33

Now, when we say

00:01:36

10 cubed, it represents a thousand, and when we talk about it, we're

00:01:41

talking about a thousand times the kilogram here.

00:01:44

Here, as an example, Nuri used kilovolts. Not only this, but also

00:01:48

kilowatts, or the kg that I talked about a little while ago,

00:01:53

kilometer, etc., all of them contain three units called kilo, 02.

00:01:58

More than 1000 units of anything. You

00:02:03

can say that it is bigger.

00:02:04

That's right, 1km is twice as small as 1m,

00:02:09

so 1km is

00:02:13

several times bigger than 1m.

00:02:21

Next,

00:02:25

there is a word that we call mega, which means a million times. Everyone, if you were looking for a Megaton ice cream in the past, it is

00:02:29

not a Megaton ton or two pennies, but a

00:02:35

taste called Megaton Maega, and it costs 1 million, so it means 1 million money.

00:02:41

Now, we have a very large amount of 5 TNT bombs. I

00:02:47

say "mega", but what would normally be "mega" is now

00:02:52

equivalent to an atomic bomb.

00:02:58

I think they named it that way because such a powerful and delicious ice cream told them to do it all. The word "hawk" can also be used as a unit of weight.

00:03:04

In electricity, we used to use the

00:03:09

unit called ohm. Of course, now we use the unit called watt. So,

00:03:13

expressing the unit watt like this is usually also used when we talk about two units of power.

00:03:21

You can hear the word "mega" a lot in computer terms as well.

00:03:25

Well, 1 megabyte, 100 megabytes, right.

00:03:29

10 I bytes. Just 2 of the malt is also the same thing as doubling.

00:03:36

Next, there is something called giga. Normally, in the past, when I was young, the

00:03:41

hard disk capacity of my computer was enormous, but

00:03:47

now it has surpassed the unit of malt and now we have entered the era of

00:03:50

gigabytes. The period of time corresponding to 10 to the power of 9 is 1 billion times warmer. You

00:03:57

can just write it like this.

00:04:02

Of course, now institutions are very large units, so when we usually talk about 2g of power,

00:04:06

we can now say the amount of power consumption and power generation at the national level as

00:04:10

gigawatts, and here's something called gigahertz.

00:04:16

When talking about the number of flirtations, we can say that the key is hertz.

00:04:20

These days, if you see something like a wireless router, it says the key is hertz,

00:04:26

or 2.4 key hertz. Now, when we express the flirting number like this, it is

00:04:32

usually. Objectors also use a lot of .

00:04:35

Of course, when talking about frequencies here, malt is also used.

00:04:39

I also use 97.5 times the things you are wondering about, but I also use a lot of GB.

00:04:45

Next, the computer hard disk capacity is also now 12 GB. The era of Terra has gone beyond the times.

00:04:52

This means 1 trillion times. So 1TB is

00:04:58

equivalent to 1 tb larger than 1 byte. The

00:05:01

word Terra can be used a lot, and the

00:05:06

words we usually hear around us now are We use the word terror when it refers to very high frequencies called terahertz, or when it

00:05:12

refers to a large storage capacity called terabytes, like your hard disk.

00:05:18

Of course, there are those above, but in general,

00:05:22

you have about four types.

00:05:29

We can see that it is a sign that is greater than 1. Now, what is the small thing in this?

00:05:32

What is the small thing? Let's take a look. The first is Bae, which means 1/10, 0.2. The

00:05:40

word dash is not used often. In general, the

00:05:44

dash berry, which we use to indicate the size of the noise, is slightly related to Mr. Yodae in front of this.

00:05:52

This is a little different from other places because this dash is a

00:05:55

relative standard for a certain noise. It's

00:06:00

a bit difficult to compare it as an absolute standard, but you can remember that 10l is expressed like this anyway.

00:06:06

Next, there is centi where we talk about 100th of a day.

00:06:10

In this case, it is often expressed as cm rather than cm.

00:06:16

How many cm is 1cm? It means

00:06:21

1/100th of a meter. So, if there are 100 1cm, it

00:06:26

becomes 1m.

00:06:27

1/100th of a meter can be expressed as 1cm.

00:06:32

Next Now, as a commonly used expression, here is an expression called milli. We are

00:06:37

talking about 10 minus 3 squared. 0.001,

00:06:42

that is, 1/1000, we say milligram,

00:06:47

millimeter, right.

00:06:51

All of these things are milliampere,

00:06:55

millivolt, etc. We all use this prefix called milli.

00:07:02

Here, as an example, milliampere is shown.

00:07:07

Next, there is a micro that talks about 1/1 million. With this bike, we are

00:07:11

talking about the era of the unit micro. Everything is

00:07:15

said to be very small like this. We can

00:07:18

express things like the length of a hair or something like this, and we

00:07:22

can often express it as a micro. In

00:07:24

general, in electricity,

00:07:28

rather than using things like micro grams, micrometers, micro amperes, or micro volts, we use power outages.

00:07:33

As the size of the capacitance, that is, as a unit expressing the ability of how much electricity the condenser can accumulate,

00:07:39

the unit called microphone is often used.

00:07:43

There is a micro, followed by an equator called micro, followed by a

00:07:47

para. If you add a s, let's say it's a micro Sara. For example, if

00:07:55

it's written like a pear, you can say it's a hundred micro new luck. Now, let

00:07:59

's say this is a pear plus a hundred times micro. It's

00:08:03

10 minus 6, so it's easy - it's also called a parody of 6 weeks. You can see

00:08:08

1 Micro Parason. How can we help? This is 1

00:08:23

There is also nano. Now

00:08:26

when we talk about life sciences and things like that, we usually use words like division and the like. This is a

00:08:31

unit corresponding to one billionth of a billionth, and it is

00:08:36

also called nanometer or division. But in politics, it is also called nano. I don't use it very often, so I do

00:08:41

n't think it's something I want to emphasize to you.

00:08:44

Next, there's something called pico. It's represented by a lowercase p, and it

00:08:48

represents 1 trillionth. Usually, we lose 1 trillion, and terra

00:08:52

is 1 trillion. When the work is done, it is now expressed as a picker. The

00:08:57

unit of capacitance in the condo is usually expressed in pico units.

00:09:01

So, we can talk about Tico Fara again.

00:09:04

So, if you ask me, what do I often use in the development here? What is

00:09:08

often used in deployment is the

00:09:19

unit of kilocenti 1 2 2 micro pico. This can be seen as a prefix that we often use in deployment.

00:09:26

For example, when we say 1 megawatt, this is how many How

00:09:32

many times is 1 heart times 10?

00:09:41

When you say doubling, it's 10 times 6 times more. It means 10 times 6 squared watts. For example, if you say it's a kilovolt, it's 1 times 10

00:09:46

3 stock fault number 1. Since it is 10 times 3 work, this

00:09:51

means $1,000.

00:09:55

For example, if you say 1.55 kiloamps, this means

00:10:00

1.5 times kilo is 10 samjae, so only this much is ruined.

00:10:06

This can be seen even after using 1500 amps. If

00:10:11

you first look at the two-fold tour and see the symbols, it

00:10:16

may not be easy to read. But if you come across these things often, it is not difficult for us to

00:10:21

think about it.

00:10:22

If in engineering, this is a little bit If you are confused, try converting it

00:10:27

to the capacity of the hard disk you use in your daily life, or the unit of weight or length. You will only be

00:10:32

confused once or twice, and from then on,

00:10:37

you will probably be able to remember it comfortably.

00:10:40

Don't think about studying too hard. Let's do it together.

00:10:44

Yes, thank you.

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안녕하세요, 동반자 여러분. 일상생활과 공학에 사용하는 접두어에 대해서 알아보는 시간을 갖도록 하겠습니다. 다양한 접두어를 익숙하게 만나시기 바랍니다. 전병칠 드림 #접두어#마이크로#메가

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