I have a mechanical automatic watch. It charges with the hand movement. So does it charge even when the metal disk moves even a slightest bit or does it require one complete rotation?
we know that limit deltax/deltat as deltat tends to zero is defined. we take a value which i thought till now is unattainable. But now i am beginning to understand that its not unattainable. its unattainable as the slope but what we do is we use algebra to rearrange it in a way that we can see whats the exact value. By removing deltat out of the denominator and putting it in with addition(for example)