@JohnRennie Sir, angle of friction is probably just a useless term. It is defined as the angle made between the normal reaction force and the resultant force of normal reaction force and friction.
Yes sir, but i think they are trying to create an angle of inclination and then they calculated what is the force on the body along the incline when the body just starts to move. This should be wrong.
@RishiNandhaVanchi Just like that? F=U-TS afterall !!!
I searched all over the internet...Couldn't find even one result on it.. This one was also from TIFR...I don't understand from where these people think of these questions, and how do they expect people to do these kind of things? :(
there was an exponential type of relation in kvpy past year papers too. And truthfully I found out by integrating and got the exact exp however the approximation seemed kinda bogus
@RishiNandhaVanchi I know this is a JEE chat room..but, actually this question is from postgraduate entrance exam, so you know...all kinds of things come there :)
Yes...You get the number of particles(Ni) in ith energy state(Ei---excited or ground)...From the total number of particles(N) and background temperature(T)
This is an approximate one only though(ignoring QM properties of the electron)