Recent content by daemonakadevil

Actually let me clear the question again , Actually when we add heat by hot reservoir in isothermal process , then there is net entropy decrease in entropy by doing work. but we say for reversible process that heat transfer should be done by very little temp. difference , in isothermal process...

Can anyone tell how isothermal reversible process takes place , means if we give heat to system , entropy will increase , and after doing work by system, does entropy will become zero again? but i heard that entropy once created can't be decreased! , so how the isothermal process is reversible...

Hello Lords of Physics, sorry for pestering you guys again but these days a question about irreversibility is pestering me , my question is Why we say that irreversibility in process is due to finite tempreture difference ? so if there is finite temp diff. why process is not reversible...

Thats initial phase angel , which means now wave has some y (displacement) initally at point x=0 due to the phase angel. actually phase is important concept when you are dealing with interference of two or more waves . Suppose two waves are having same frequency and same velocity but have to...

no one else? , thanks in advance!

Can you be little more descriptive this doesn't clears my concept at all! means can you tell me with easy language that how to solve if torque is given on other point (x,y) and some forces then how to find torque about a point (x1,y1) (means on another coordinate) , thanks again

I already told my question that i need to find the torque about point A but i am having problem with the torque 20 nm that how to or resolve that torque about A . Btw the distance btw 4m line and point a is also 4 m. My semster exams are on 7 may. So please just tell me how to solve it...

Hi friends and Sir's , I am stumbled upon a problem and unable to solve it , can anyone tell me what will be the torque at A and how you did that? here is my problem : http://img180.imageshack.us/img180/550/torquexu4.png thanks!

now i got the concept , thanks here is now what i visualise in my mind hxxp://img291.imageshack.us/img291/9711/sinesm3.png

please mods move this thread General physics , thanks!

Hi Everyone! I have couple of questions this time! :D 1) In refrigerator we say that we have to do some work on system to flow heat from lower temp body to higher temp reservoir , so if temp1 > temp2 then temp2 + work = temp1 now what i want to ask is that what kind of work we do on...

Hello sir tiny-tim, can you please take little time for me and teach me all this visually means by mean of diagram? , thanks in advance :)

Here is what i understood from your thesis : hxxp://img294.imageshack.us/img294/5014/sineah8.png I understood the right thing?

Hey friends and Sir's , I am trying to understand simple concept that why sine waves are function of (t-(x/v)) x= position in x direction v= velocity of wave t= is time at any instant although i have read many articles on it but still unable to understand , any help will be great and...

or try to substitute : sin(x) = 2tan(x/2)/1+tan^2(x/2) and cos(x)= (1-tan^2(x/2))/1+tan^2(x/2) it might solve the problem !