Carnot efficiency 2: Reversing the cycle | Thermodynamics | Physics | Khan Academy
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Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator). Created by Sal Khan.
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Пікірлер: 17
at around 11:45 the T2 on the top should be T1
Sal. Love these videos. One question about assumptions, in general. In lots of these videos we use the pebble thing, which is an excellent way to understand things. I wondered, though, why the removal of the pebble or the replacement of the pebble is not considered in our calculations. Is that not also a form of work? This came to mind after your Maxwell's demon video, and you mention that the demon is part of the Q consideration. Not suggesting you're a demon, at all. Maybe I should go back and look at your intro to the pebble moment. Anyhow, just a minor question. I love your instruction!
8:12 is an adiabatic expansion
@azizmurtuza8588
6 жыл бұрын
Oludotun Ogunsola i
Two questions mr khan. 1. Why did you call the first isotherm in the carnot refrigerator adiabatic contraction? If the volume increases isn't that expansion rather? 2. On this isotherm, is there a temperature temperature drop to a value of T
Fantastic! Thanks very much
Thank you
thanks a bunch... your videos are awesome! :)
you are great bro just keep d'ing
8:11 He means adiabatically Expand and not contract
If only he would have said which is the most efficient engine... Hahah kidding thanks mate ur help is appreciated
cool
Timeline : 8:17 Since we are adiabatically contracting, the volume of the air should reduce. But here the volume is increasing as we move from Step 1 to 2. Can you please clear out this confusion?
@criticalmindset8471
7 жыл бұрын
Vipul Verma I se this was 2 years ago but I hope you've gotten your answer by now:)
contraction means compression
well..I feel like Sal was in a kind of a hurry..
@kristiancasupanan8651
6 жыл бұрын
Rituraj Borah i think thats how an expert wants to explain very well his idea to us by saying it fast (not in hurry) cause the way he explained so fast, it makes our brain cells lead us to his main point. So therefore he doesnt sound in a hurry. I think thats how the way an expert explains very important detail leads to his main point.