Emmit the first comma in ur sentence bro it isn't necessary and replace your second comma with a period because it makes your grammar wrong. Friendly reminder :)
Thank you so much for this video. My current professor is not as eloquent as you are, I have had epiphany after epiphany watching this video. Thank you!
I'm going along and doing all those Physics problems I (should have) had done as a Physics Major so long ago before I switched Majors. I don't have any Professor now in my Summer Years so I am grateful for the help Khan Academy!
I can see why its 1 - T2/T1 when the gas the other side is what counters the presure from the gas before heating that makes sence. But you could get higher efficencys if it was only pushing aginst a vacume or just a gas with lower pressur at the same temprature. Its the gas that has its volume reduced thats takeing the T2/T1 of the energy in the carnot engine.
Sal, Excellent series on thermodynamics(entropy,heat engines). Can you show Thermo princples applied to the modern electric car. I believe electric cars are not so "green" when we include the total universe required to power them. Include efficiency factors from the burning of the coal at the power plant to the batteries making the wheels turn.
I'm sure you've figured this out a year later, but for anyone else that reads this, there's no mistake, it's just a subtlety of whether you define W as the work done by the gas or on the gas which changes the sign.
VERY GOOD. THANKS YOU VERYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY SD
When you calculate Q1 and Q2, it looks like you're only taking into consideration the isothermic parts of the process. Why are we ignoring the adiabatic parts?
@@gabor6259 I understood. It was a stupid question evoked because of lack of clarity about how integrals work. Thanks for replying though. The pressure value will change as the integral gets evaluated at every deltaV so its not taken as a constant.
This channel will be the reason, I will graduate mechanical engineering, thanks a lot man
Emmit the first comma in ur sentence bro it isn't necessary and replace your second comma with a period because it makes your grammar wrong.
Friendly reminder :)
@@savagegaming5024 I think you mean to say- 'Omit' the first comma...... "Emmit" is the wrong spelling. Friendly reminder :)
And me in civil and environmental engineering :,DDD
watching this now as a mech eng student with finals in 3 weeks, hope you are well
I love how he says what he is going to write and then says it again as he writes it.
Thank you so much for this video. My current professor is not as eloquent as you are, I have had epiphany after epiphany watching this video. Thank you!
Mr . Sal khan . after 10 years people are still learning from your videos including myself. thank you
make that 12
Make that 13
How bout 14
I'm going along and doing all those Physics problems I (should have) had done as a Physics Major so long ago before I switched Majors. I don't have any Professor now in my Summer Years so I am grateful for the help Khan Academy!
Which was the lesson before this?? Just so I can watch them one by one for my Thermo Class.
Thanks!!
Mr Khan, great work. Can you please relate efficiency to Co-efficient of performance please. Both terminologies confuse me.
Am i the only one watches this after 13 yrs!
These videos are really helpful and you make it very easy to understand.
I can see why its 1 - T2/T1 when the gas the other side is what counters the presure from the gas before heating that makes sence. But you could get higher efficencys if it was only pushing aginst a vacume or just a gas with lower pressur at the same temprature. Its the gas that has its volume reduced thats takeing the T2/T1 of the energy in the carnot engine.
sir can you explain the cp and cv topics for different monoatomics,diatomics,and triatomics gases
So, where is this mysterious next video, this fine gentleman was speaking of?
Thanks!
u r awesome....plz derive the equation of efficiency of carnot cycle by T-S diagram .....i will glad to see that video :)
Forever grateful for you!!!!
khan acadamy is brilliant
Oh Sal my friend, I am so glad to see you again.. I thought I would never see you after DiffyQ
Mr Sal Khan and you both were friends?
Sal,
Excellent series on thermodynamics(entropy,heat engines). Can you show Thermo princples applied to the modern electric car. I believe electric cars are not so "green" when we include the total universe required to power them. Include efficiency factors from the burning of the coal at the power plant to the batteries making the wheels turn.
kindly let me know the video in which you have shown that (Vc/Vd)=(Vb/Va)
use adiabatic relationship for temp and volume for the adiabatic parts of the cycle and then divide
Your videos are amazing and are useful even after 14 years ... but the thing is , isn't
du=dq+dw
Becoz that's what I learned...
Nope.
dQ=dU+dW
From first law of thermodynamics wheres,
dq is change in heat
du is change in internal energy
dw is work done
@@SoBasicallyImRetarded brooo.... I double checked it, it is what I said
It is given in Google too
I'm sure you've figured this out a year later, but for anyone else that reads this, there's no mistake, it's just a subtlety of whether you define W as the work done by the gas or on the gas which changes the sign.
VERY GOOD. THANKS YOU VERYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY SD
very nice
Carnot engine powering your lawn mower, that made me laugh for some reason. Great video.
Does Sal Khan always voice his Khan Academy videos?
No, for example in video "Buffer capacity | Buffers, titrations, and solubility equilibria"
12:40 i did not get it
When you calculate Q1 and Q2, it looks like you're only taking into consideration the isothermic parts of the process. Why are we ignoring the adiabatic parts?
Q is zero in adiabatic processes
@@aagmanbajpai5453 ah thanks
But why is Pressure taken as constant during the isothermal expansion? Pressure is decreasing and not constant from the graph.
You mean the integral? He substituted nRT/V for p.
@@gabor6259 I understood. It was a stupid question evoked because of lack of clarity about how integrals work. Thanks for replying though. The pressure value will change as the integral gets evaluated at every deltaV so its not taken as a constant.
i cannot find the second law of thermodynamics :((
thanks :)
But one work is negative and the other is positive. So you have a sign flip when converting efficiency from Q to T.... where did the negative go?
Only legends noticed the screeching hum from the last few videos
i think that derivation by T-S diagram is much easier than P-V diagram
5/5
If u see a pic of Carnot he was really pretty lol. What an adorable twink legendary scientist
Just looked him up....He was adorable indeed. Sad that he died at 36..he was so young
süper
Sir T2 / T1 kaise cancel Hua h, please tell me 🙏🙏
💞💞💞
Sir try improving hand writing!
No offense
not car of engine