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Magnetohydrodynamics

RRP $684.99

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For seventy years, we have known that Einstein's theory is essentially a theory of propagation of waves for the gravitational field. Confusion enters, however, through the fact that the word wave, in physics, implies sometimes repetition and sometimes not. This confusion is often increased by he use of Fourier transforms, by which a disturbanse which appears to be without repetition is resolved into periodic wave-trains with all frequencies. But, in a general curved space-time, we have nothing corresponding to Fourier transforms. Here, we consider systematically waves corresponding to the propagation of discontinuities of physical quantities describing either fields (essentially electromagnetic fields and gravitational field), or the motion of a fluid, or together, in magnetohydrodynamics, the changes in time of a field and of a fluid. The main equations, for the different studied phenomena, constitute a hyperbolic system and the study of a formal Cauchy problem is possible. We call ordinary waves the case in which the derivative of superior order appearing in the system are discontinuous at the traverse of a hypersurface, the wave front; we call shock waves the case where the derivatives of an order inferior by one are discontinuous at the traverse of a wave front. XI xii PREFACE From 1950, many well-known scientits (Taub, Synge, Choquet-B ruhat, etc.) have studied the corresponding equations for different physical phenomena : systems associated to the electromagnetic and gravitational fields, to hydrodynamics and to magnetohydrodynamics.


Penny Dreadful Is A Magnet For Disaster

RRP $9.99

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Penny Dreadful is a magnet for disaster. Starring in her first three stories, Penny creates mishap, mayhem and misadventure wherever she goes.

Penny Dreadful becomes a Hairdresser - Penny's convinced her stint as a "haredresser" will quickly earn her enough money to pay back her debt to her mum. Armed with a Silent Strimmer, superglue, and under the watchful supervision of a sleeping Gran, what could possibly go wrong?

Penny Dreadful and the Faithful Sidekick - After watching Animal SOS, Penny decides she needs a faithful sidekick to train. the "abandoned" dog outside the post office will have to do - but will an incident with a baby monitor, a tutu, and a Russian au pair land them in the doghouse?

Penny Dreadful and the School Inspector - Mr Schumann, the headmaster, is keeping a close eye on the mischief-making Penny Dreadful during the school inspector's visit. But when Penny's best efforts to behave result in a mishap with a Jedi outfit and a swarm of locusts, is it the end for Penny's school?


Magnetohydrodynamics

RRP $137.95

Click on the Google Preview image above to read some pages of this book!

For seventy years, we have known that Einstein's theory is essentially a theory of propagation of waves for the gravitational field. Confusion enters, however, through the fact that the word wave, in physics, implies sometimes repetition and sometimes not. This confusion is often increased by he use of Fourier transforms, by which a disturbanse which appears to be without repetition is resolved into periodic wave-trains with all frequencies. But, in a general curved space-time, we have nothing corresponding to Fourier transforms. Here, we consider systematically waves corresponding to the propagation of discontinuities of physical quantities describing either fields (essentially electromagnetic fields and gravitational field), or the motion of a fluid, or together, in magnetohydrodynamics, the changes in time of a field and of a fluid. The main equations, for the different studied phenomena, constitute a hyperbolic system and the study of a formal Cauchy problem is possible. We call ordinary waves the case in which the derivative of superior order appearing in the system are discontinuous at the traverse of a hypersurface, the wave front ; we call shock waves the case where the derivatives of an order inferior by one are discontinuous at the traverse of a wave front. XI xii PREFACE From 1950, many well-known scientits (Taub, Synge, Choquet-B ruhat, etc.) have studied the corresponding equations for different physical phenomena : systems associated to the electromagnetic and gravitational fields, to hydrodynamics and to magnetohydrodynamics.


Make Me A Superhero

RRP $14.99

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Costume and disguise sticker fun Use the stickers to dress up the characters and create a mix and match flip book for endless fun. Use the stencils and pattern sheets to design your own super suits. Colour and create your own superhero characters. Flick the corner of the colouring pages for superhero action. Includes 5 characters and 5 sticker sheets for hundreds of cool combinations presented in a super plastic cover shaped like a bag Also available Make Me a Model.


Interactions Between Charged Particles In A Magnetic Field

RRP $519.99

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This monograph focuses on the influence of a strong magnetic field on the interactions between charged particles in a many-body system. Two complementary approaches, the binary collision model and the dielectric theory are investigated in both analytical and numerical frameworks. In the binary collision model, the Coulomb interaction between the test and the target particles is screened because of the polarization of the target.



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Magnetic Therapy Magnets Magnetic Healing Electromagnetic
Magnetic Jewelry Super Magnet Magnetic Mattress Magnetic Pad

Magnet Therapy Books

Magnetic Therapy Magnets Magnetic Healing Electromagnetic
Magnetic Jewelry Super Magnet Magnetic Mattress Magnetic Pad

Magnet Therapy





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