Recent content by Mohammed Shoaib

Thanks for your kind help.

Then momentum is conserved. Is it not?

And the kinetic energy of the car is lost as heat to the car and the surrounding.

Momentum is conserved when no external force acts on the system. When the car comes to normal stop, the external force from the road or from the brake acts on the car to stop. Hence, the conservation of principle is not valid in this process. Am I right.

Then what about the principle of conservation of momentum?

Before stop the momentum is decreasing and after the stop it is zero.

Question says" When a car comes to a normal stop its momentum is not conserved. Does this violate the principle of conservation of momentum? Explain. What happens to the car's kinetic energy?" My question is why momentum is not conserved when a car comes to a normal stop?

Potential energy U=1/2kx2 = 40J and m from e=mc2 gives m=4.44x10^-16kg. Thanks for support.

How can we relate the factor c speed of light in the E=mc2 and say this equation explains the increase in mass of a stretched spring. kindly explain the role of c here.

Thanks for reply. But sorry I did not get that? Why did you use relativistic energy momentum for a mass - spring mass system.

What's wrong in it. He just wants to know in detail about your plan such that he can guide you.

I came across with this question in my work. A stretched spring has greater energy and therefore greater mass than an unstretched spring. What's the mass increase when you stretch a spring with 500N/m by 40cm? My question is How mass can increase with stretching of the spring? As per...

The spacing between atomic planes in a crystal is 0.120 nm . 15.0 keV x rays are diffracted by this crystal What is the angle of first-order diffraction?What is the angle of second-order diffraction?My question is that the manual says to use 2dcosΘ=mλ instead of 2dsinΘ=mλ( bragg diffraction...

Thanks a lot for clearing my confusion.

The electric field in a 2.5mm×2.5mm square aluminum wire is 2.1×10−2 V/m . What is the current in the wire? The answer is I=4.65A. But my question is according to Gauss law, the electric field inside the conductor is zero. then how come this question says "The electric field in a 2.5mm×2.5mm...