# Recent content by Ali Asadullah

1. ### Sqrt(x^2) and (Sqrt x)^2

Sir let (sqrt x)^2=x And substitute x=-1, then we would have (i)^2=-1. Is it right?
2. ### Sqrt(x^2) and (Sqrt x)^2

Sorry Second one was actually (sqrt x)^2. Sir if this is not defined, then how we define iota?
3. ### Sqrt(x^2) and (Sqrt x)^2

Thank You Mark44 Please also tell me whether they are equal to each other or not?
4. ### Sqrt(x^2) and (Sqrt x)^2

Please tell me Sqrt (x^2)=______ For All Real Numbers (Sqrt x^2)=______ For All Real Numbers Thank YOu..!
5. ### 1^2 = (-1)^2

Another Question Sir, Is it right that sqrt(x^2)=(sqrtx)^2 for all real x?
6. ### 1^2 = (-1)^2

Bur Sir, Sqrt(x^2)=x is valid only when x is positive. How can it be valid for -1?
7. ### 1^2 = (-1)^2

Then Sir what will be the square of i?
8. ### 1^2 = (-1)^2

1^2=(-1)^2 taking square root on B.s 1=-1..?
9. ### Solving Exponential Equation

We know how to solve problems like e^ax+e^bx=k, when a=2b. But how to solve equations of this type when a is not equal to 2b?
10. ### Entropy Change Associated with Work

Why entropy change associated with work is zero?
11. ### Continuum Idealization

Please explain how the Continuum Idealization allows us to treat properties as point functions and to assume that properties vary continually in space no jump continuity? Thanks
12. ### Internally Reversible and Isothermal Processes

What are Internally reversible processes and why isothermal processes are reversible? Also, Isothermal process are only internally reversible or they can be "externally" reversible?
13. ### Gravitational Slingshot Effect

Thank YOu tiny-tim and Berkaman
14. ### Gravitational Slingshot Effect

Thanks Dear. Please also explain that why the object doesn't orbit around the planet...? Which force(s) pushes it away from the planet even when Gravitational Attraction is present between the object and the planet.
15. ### Gravitational Slingshot Effect

Please explain Gravitational Slingshot Effect? And when an object passes near from a planet, why it doesn't start orbiting around the planet? Why the object is pushed away even when there is attractive force (Gravity) between object and planet ..?