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HNQ
2:49 AM
2
Q: Does isothermal expansion not beat the efficiency of Carnot Heat Engine?

JustCuriousQues: If I just take the 1st step of a Carnot Heat Engine (CHE) than it turns out to be more efficient than the CHE itself. Explanation: The 1st step of a CHE is the pure isothermal expansion of (ideal) gas where all the heat($Q$) taken from the source reservoir is converted into work($W$). That ...

 
 
5 hours later…
HNQ
7:22 AM
1
Q: How can I know who is accelerating? – Inertial reference frames and relative motion

Lucas Tell MarchiSuppose I (observer $I$) am standing somewhere in space. I see a region in which my friend ($F$) is accelerating in some direction $\mathrm{\mathbf{\hat{u}}}$. Suppose I see everything in $F$ accelerating in the same direction. My question is: how can I know if I am an inertial frame of reference...

 
 
6 hours later…
HNQ
1:48 PM
2
Q: Confusion About Energy Bands

MathAndPhysicsI read about energy bands in a physics textbook, and I couldn’t understand one thing about them. The book defines an energy band as continuous energy levels of electrons that are so plentiful that they are like a continuous band. But, isn’t it impossible for energy levels of electrons to be conti...

 

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