Medium Definition and 365 Threads

Can anyone point me to some reference as to how magnetic fields are produced in the inter stella medium please.

How long can i store the mediums? Are the storage conditions the same for the medium of bacteria and mammalian cells? Thanks.

Velocity of light changes when it passes through a material medium. IS it possible for a particle(e. g. an electron) to travel faster than light in THAT medium? IF so, can someone give me some examples or experiments documenting this?

is there a website which shows which medium and serum is for a cell line (mammalian cells)? i have the problem looking for the right medium and serum. thank you.

new to the forums, had a question and thought someone might have an answer. If I remember from high school physics, in order for a wave to occur it must pass through a medium i.e.. sound through air, waves through water. my question is what do light waves use as there medium as they can travel...

Consider the electromagnetic field in a linear medium with material properties \epsilon \ \ \text{and} \ \ \mu . Calculate \nabla \cdot \mathbf{S} for the energy flux \mathbf{S = E \times H} . My work: \nabla \cdot \mathbf{S} = \nabla \cdot \frac{1}{\mu}(\mathbf{E \times B }) =...

I am trying to get a basic understanding of the physics of the interstellar medium and the current models which describe it (FGH and McKee-Ostriker). A first question arises regarding the possible assumption of a gas in ionization equilibrium, in which ionizarion and recombination occur at...

In audio, I've learned that sound energy are particles being compressed and rarified at specific rates, causing a "wave of pressure". Thus, sound is represented in a wavelength because of the medium it is "distorting" My barely-elementary understandinf of QED makes me believe that in order...

In this recent press release, "Chandra turns up the heat in the Milky Way center" http://www1.msfc.nasa.gov/news/news/releases/2004/04-169.html it is described the observation of heated gas at a temperature of 100 million K at the center of the Milky Way. It seams to be still an open...

Electrolysis will release the elementary components of a medium, albeit the process required a fare amount of energy, is there any other reasons it would be considered secondary to a more effience process? Does it have any pros?

Im not sure if this is the right forum for this question as I am unsure where it fits. I always think of a Shock Wave as something that travels through a medium, as in a sonic boom from an aircraft, but some talk of shock waves in space, as in the shock wave from a supernova, is this the...

Ok i thought i had this all set up but i can not configure my e mail i keep getting the error, fetchmail 6.2.5-45 i 586 was not found on the medium, do i have to load this from cd? once i found all the internet settings that worked ok without the cd. im using suse 9.1 thanks for any help.

Originally posted in College Level Homework help but I got no responses there. Please help if you can. I am studying for my qualifier and doing problems out of Jackson. I am stuck on this one... any help would really be appreciated... I am unsure how to begin: Jackson 7.15 The partially...

I guess I have rather a simple question: Can light be a medium for sound waves? I don't know where this question should be placed so I thought general physics was a good spot.

What comprises the transition from math to physics? alexander has said that physics is math. John Archibald Wheeler has wondered how equations "fly" (take on a physical character). I believe that math and physics are interchangable, that both can be shown to transform into the other. We...