Recent content by Est120

That current is "driven" by the magnetic field, as the magnetic filed is guided by the surface of the conductor. Magnetic field appears basically nowhere in these equations.

We know that E is conservative so the integral of E around a closed loop is zero. I know this helps us (in some way, that's why i'm asking) to calculate the total voltage drop around the complete circuit (which is zero). What exactly is "E" in the integral? For example, internet says "electric...

I'm just not able to grasp the concept of a LC circuit intuitively, and yet I have found zero answers to my doubts. I can't understand why does the current keeps flowing counter-clockwise between the 3rd and the 4th circuit (see image attached) I know that when the capacitor has 0 charge, in...

Can someone explain me what does the underlined part of the following passage mean? "The reversible operation of a fuel cell implies that the external circuit exactly balances its emf, with the result that its current output is negligible. In actual operation under reasonable load, internal...

how they got that value for the scale factors h?

how does the partial pressure of oxygen (O2) that is raised to the (1/2) power "magically" combines to give PSO3? , i know that at constant Temperature you can pretty much express pressures between reactants and products using conversion but still you won't be able to factorize because they are...

i think the sphere must be going up instead of down so this actually makes sense

in my head this is just a silly problem in which i need to determine the ↓ force (weight) and the ↑force (archimedes bouyant force) and then the difference must be the drag force ↑ (the force that involves velocity) but i can't get any sense out of this answer how is possible for the sphere to...

B is not necessarily reversible, "running B backward" needs some additional external work to be done, just A (reversible machine) does this without any external influence, just all by itslef

i have tried to understand Feynman's words i think i finally understands what he means by "we must add a little extra to get it to run" he refers to the "inversion" of the process, that's when we need to add extra work (lifting up a little mass) please correct me if I am wrong, this is something...

suppose i have liquid and vapor water inside a vessel at say 3000kPa, then i suddenly open the valve, as the water (liquid) flows out the vessel (control volume) is water inside the cv evaporating at the same rate liquid flows out? so the volume of water inside the cv remains constant?

i got it now, thank's for all the advice

then why do we need all the reversible path crap also the value for W according to the "normal" formula (F*dist) at the end is always the same regardless of the path (mg and Pa are always the same in te process) using that formula you can't differentiate from an isothermal or adiabatic or x...

i can't manage to grasp the concept of PV work in thermodynamics, for example we all know that W= integral(F*dx) like here but this says that, at the end, W doesn't really depend on the gas temperature or reversible process crap at the end W is simply a constant, atmospheric pressure is...

i know that... but it seems no body understands my doubt if the environment is exerting work on the system, then the system internal energy ↑ increases but if the system is exerting work on the environment then, energy must come out of the system (in order to deliever work) and that energy...