00:01
In this question we want to find out three values of efficiency.
00:04
So let's first write down the equation for the efficiency.
00:11
Efficiency we can write it as eta, which is equals to 1 minus tc divided by th.
00:20
This is our general equation number 1.
00:23
Now let's start with the first part.
00:26
In the first part for the engine a, for the engine a, we have.
00:31
Tc which is equals to 700 and t .h which is equals to 1 ,000.
00:40
This tc is the old reservoir temperature and th is the hot reservoir temperature.
00:49
So the efficiency becomes eta which is equals to 1 minus 700 divided by 1000 which is equals to we get this as a point 3.
01:00
Next, for the engine b, we can write here we have t c which is equal to 500 and th which is equal to 800.
01:14
So we can write the efficiency eta...