Outside Definition and 459 Threads

I have read that the Dark-Energy may be a consequence of Pressure from outside of the Universe. The presence of a spin zero field (higgs-field) seems to make this idea really interesting. Negative pressure was postulated by Poincaire, Dirac. Accordingt to the author, negative...

Hi I have scoured the internet trying to find the right expression to calculate the magnetic field (B) outside of an AC driven solenoid. All i keep getting is stuff for DC driven or inside the solenoid. Can anyone help? thanks Craig

Does anyone have an intuitive explanation why the gravitational force of a sphere on a distant point is the same as if all the sphere's mass were concentrated at the center? The usual integration over spherical shells goes through o.k. but the result is so simple it seems to me that maybe we...

A hollow spherical shell is uniformly charged with a total charge Q. Show that the electric field outside the shell is everywhere the same as the field due to a point charge Q located at the center of the shell.

A point charge Q is at the center of a conducting spherical shell of radius R. The total charge of the shell is -Q. (a) What is the field in the region between the point charge and the shell? (b)What is the field outside the shell? I think I got part (a): F = \frac{kq_1 q_2}{r^2} =...

A square has 360 degrees, if you measure the degrees on the outside, what degree do you get?

Matter can only exist in space-time, so outside space there is nothing, but snce space-time is in "nothing" would our existence be a paradox?

I know that there are devices which shift or replace wavelengths of light that are out of the visible spectrum so that we can see them. What would be the result of having a device which can sense artificial light bypass the restrictions of our eyes and send impulses directly to our brain. If our...

i read in the paper today that bush is worth something like 10 million dollars. and this is made up mostly of stocks and other investments. how can we trust him to do what's right for the country, and not what helps out his investments?