Recent content by DannyMoretz

Thanks a lot Chestermiller, this has fixed my understanding. I was about to tell my lecturer that he was doing something wrong :S.

Ok, thanks a lot, I will explore the method you suggested.

Yeah I know that part, but can I use that equation for change in internal energy ? It uses Cv, the specific heat capacity for a constant volume, but volume changes in this process ?

Thanks for the response, but I still don't understand how this answers my question.

Hey CAH, Sorry, but do you mean f(g(x)) or f(x) * g(x) ?

Hello everyone, I just need some help understanding some thermodynamics. So I have 0.25 kg of helium which is compressed from an initial state in a polytropic process with n = 1.3. So its given the change in volume and the initial pressure. I need to find the change in internal energy. I am...

So I have a 28BYJ48 stepper motor... it is rated at a voltage of 5V. I would like to optimise its speed and torque, which could be done through increasing voltage, but I know that an increase in voltage means more current i.e. will get a little hot. My question is... if I do run it at a high...

I would say yes... check out the proof I did... which I think works.. and similarily with substituting into y.