Recent content by petrushkagoogol

If space-time is curved like a klein bottle, is it theoretically possible that events could loop back in time ? :wink:

Does this imply that neutrinos have rest mass ?

If there are 3 positive charges of +1, +3, +5 coulombs equidistant from a negative charge of 1 coulomb what positive charge will this negative charge be attracted to ? Is the result different if the charges exist in a “bound” state (resulting in electrovalent compounds) where a positive charge...

Any two that originate from the same source.

Can we compute the relativistic velocities of 2 photons or 2 neutrinos ? :))

Are all planets in our Solar System in the same plane ? :))

A beam of light bends when near a star. Since velocity is a vector, although the path still follows a null geodesic, a change in direction implies that acceleration is present. Light does then, in fact, accelerate. Is this correct ?:frown:

If every particle of the Universe was made to occupy the state at which it was 2 years ago, would there be an action replay of events from (T-2) yrs to T ? Or would subsequent events be different ?:rolleyes:

Bell's theorem states that super-luminal communication exists between particles that are separated by space-like separation viz. faster than light transmission of information. There is spontaneity in this. Relativistically this would amount to going back in time. The state of creation of...

As I understand it, the Universe is red-shifted (emission spectra) from any point of reference looking outwards. The Universe is expanding, but is matter being created at the same rate ? Does this mean that the density of matter in space is decreasing ? (density = mass / volume). What does this...

Why is gravity always attractive in nature ?:frown:

Any anti-matter particle in Nature seeks out and gets annihilated by the first matter particle it encounters. (always the first). Is there a kind of superluminal communication between matter anti-matter particle pairs ? Is this consistent with the laws of physics ?:))

To first compare the structures of 2 tables you can use the system view information_schema.columns.:cool:

I think you can check UNION of both tables and find the rowcount which should equal the rowcount from table T1 as well as table T2. o_O

https://en.wikibooks.org/wiki/A_Little_C_Primer/C_Dynamic_Memory_Allocation_&_Deallocation For simple programs, it is OK to just declare an array of a given size: char buffer[1024] In more sophisticated programs, this leads to trouble. There may be no way of knowing how big an array needs...