00:01
In this question, you look at basically the energy produced by in china, right, in 2014.
00:08
That's how much energy generates in china.
00:12
And you assume that 30 % of the energy is produced by different types of fuelers.
00:19
And you ask you to estimate how much this fuel is needed to generate this much energy, right? so i will call this energy, right? so this is the energy, i suppose.
00:33
That's the energy e.
00:35
And clearly, the energy need to generate actually, i use the fuel is actually e over 30%.
00:43
So in other words, e over 30 % is actually the total amount of fuel you need.
00:52
It is the total energy need to be generated by the fuel.
00:56
Right because there's a lot of energy loss, which is not, which is not converted into electricity.
01:03
So let's remember the first one on.
01:04
How many jurors is this amount of electricity is equivalent to? well, let's let's find that first.
01:13
So that is, according to the question is five, six, seven, nine, binning.
01:18
Binning times 10 to, i think times tend to, if you take it to binning, i think that's times 10 to 9, right? kelo, watts, hours, right? how much jar is there? you have to write it as 6, 9, 10 to 9, kilowatts, that is 10 to 3 jouere per second, right? per second.
01:44
And then you have to multiply by one hour, which is 3 ,600 seconds.
01:49
So from this, you found that this is given by 5, 6, 7, 9 times 3 ,006, and times 10 to 12, sure.
02:00
So that's how much energy generated in china in 2014.
02:05
Then how many times of coal would be required to produce this much advantage? and that is, of course, to equal this.
02:12
So suppose the ton of coal is needed is, let's say, the end, right? and obviously, because i look at some data, per ton of coal produces this much advantage, right? right? so you'll see that e over 30 % must be equal to n times this value, right, which is 2, 460 kilowatts h for tonne...