Reversibility & Irreversibility: Crash Course Engineering #8
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Date: 2022-04-04
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Comments and reviews: 10
Sir
I am no engineer and maybe I have no idea what I am talking about but I feel like the example was a bit off. Ultimately I feel like you exchanging one work for another. Now instead of the weight, you have to move the massive volume of infinitely tiny pieces of brick and the Piston is doing the same action with the tiny pieces as it was with the whole brick. You put the brick or tiny piece on the Piston, it goes down, you take it off and it goes up. Am I just missing a key point to the example? Also don't get me wrong, not trying to give her a hard time also. She is doing a far better job at this then I prob would.
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I am no engineer and maybe I have no idea what I am talking about but I feel like the example was a bit off. Ultimately I feel like you exchanging one work for another. Now instead of the weight, you have to move the massive volume of infinitely tiny pieces of brick and the Piston is doing the same action with the tiny pieces as it was with the whole brick. You put the brick or tiny piece on the Piston, it goes down, you take it off and it goes up. Am I just missing a key point to the example? Also don't get me wrong, not trying to give her a hard time also. She is doing a far better job at this then I prob would.
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oldcowbb
-Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two small points. The third time you go through it, you know you don't understand it, but by that time you are so used to it, so it doesn't bother you any more. -
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-Thermodynamics is a funny subject. The first time you go through it, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two small points. The third time you go through it, you know you don't understand it, but by that time you are so used to it, so it doesn't bother you any more. -
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EngiBear
-I hope this series has time to get into some concrete examples (both figuratively and literally. So far it's all been very high-level and conceptual, and even then, I'm not sure the law of conservation was really done justice. Input/output balance concepts are super applicable to pretty much everyone's daily life. -
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-I hope this series has time to get into some concrete examples (both figuratively and literally. So far it's all been very high-level and conceptual, and even then, I'm not sure the law of conservation was really done justice. Input/output balance concepts are super applicable to pretty much everyone's daily life. -
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Dan
Surely breaking the brick in two and lifting it a smaller distance twice is the same as lifting a whole brick the full distance? The weights add up to the total weight. Thus the half forces add up to the total force. The distances lifted also add up to the full distance lifted.
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Surely breaking the brick in two and lifting it a smaller distance twice is the same as lifting a whole brick the full distance? The weights add up to the total weight. Thus the half forces add up to the total force. The distances lifted also add up to the full distance lifted.
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Gwyrrd
For car engine efficiency, you could also have the example of cars with Internal Combustion Engine having an efficiency of 17-21% out of gasoline, while Electric Vehicles having an efficiency of 59%-62% out of the grid.
Yay, go electric vehicles!
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For car engine efficiency, you could also have the example of cars with Internal Combustion Engine having an efficiency of 17-21% out of gasoline, while Electric Vehicles having an efficiency of 59%-62% out of the grid.
Yay, go electric vehicles!
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Alp
It is kinda a good speech of you but you are investigating the term work as a scientist approach. Engineers assume the work is positive when the system does work. Please consider this detailed but important info
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It is kinda a good speech of you but you are investigating the term work as a scientist approach. Engineers assume the work is positive when the system does work. Please consider this detailed but important info
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MoonKookie
Great videos, I love that woman's enthusiasm, really easy to listen to and follow, when i typed engineering basics i would've never thought I'd find mini series on it, made my day
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Great videos, I love that woman's enthusiasm, really easy to listen to and follow, when i typed engineering basics i would've never thought I'd find mini series on it, made my day
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Nelson
I had a professor who always had as the forth answer on his objective tests -4. Results in infinitely useless work. - Once in a while it was actually the answer.
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I had a professor who always had as the forth answer on his objective tests -4. Results in infinitely useless work. - Once in a while it was actually the answer.
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Sniper
Ma'am work done by the system on surrounding is +ve. As ball expanded it has done work on the surrounding. How come the work is negative then?
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Ma'am work done by the system on surrounding is +ve. As ball expanded it has done work on the surrounding. How come the work is negative then?
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Ronaldo
loooved this video, so helpful. and if l may ask -CrashCourse, which software did you use for the brick and cylinder animation
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loooved this video, so helpful. and if l may ask -CrashCourse, which software did you use for the brick and cylinder animation
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