Recent content by Xbehave

anti-matter is electrically the opposite of normal matter, and it can be shown that any anti-matter that collided with its particle. this negative matter would be the gravitational opposite of normal matter, I am not sure if it would be destroy on contact with its positive-particle. but as the...

actually i meant a universe where we exist along side negative-matter, to give a total mass of zero, but i wondered if there was a solution for general relativity in this situation more than the physical implications of the fact there could be no matter in the universe.

How would a universe with a total mass of zero behave? By comparing the expected result for a zero mass universe, can we be sure that our universe has total mass?

If 2 sounds of similar freq are emited from the same source you get beats, but what happens if two sounds of similar freq are emited from separate sources. I realize that its just superposition but i can't figure out what it would be like in the space between the two sources. Im happy to...

is there anyway to Change the title after thinking about it I am pretty sure it should just be "PDE with boundary condition" but i think I am stuck with the current tittle

PDE with boundary conditions Full question A function u(x,y) has two independent variables x and y and satisfies the 1st order PDE x \frac{du}{dx} - \frac{y}{2}\frac{du}{dy}= 0 by first looking for a separable solution u(x,y)=X(x)Y(y), find the general solution of the equation. determine...