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For a parallel plate capacitor is The poynting vector points everywhere radially outward of the volume between plates.

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16y ago

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What are some similarities between the snowflake and the glass shell of the radiolarion?

Both the snowflake and the opaline skeleton of radiolarians appear radially symmetrical, although the radiolarianskeleton is not strictly symmetrical all the way to the center;skeleton's variety is limited by the finite number of species;skeletal symmetry is 3-dimensional, instead of 2-dimensional;skeletal symmetry is not necessarily hexagonal.


How are echinoderms similar to vertebrates?

they are radially symmetrical


According to Hubbles law galaxies are retreating at a speed that is proportional to their?

I'm not convinced that your proposition is correct. I realize that cosmologists use a lot of simplification in their descriptions, for friendly reasons, but I always prefer to keep things fairly straight. It is my reading of Hubble that he postulated that remote galaxies were receding -- at the time they emitted the light which we are now receiving -- from us at a speed which was proportional to the distance from where they were then to where we are now. How one interprets the concept of distance, in view of the separately postulated "expansion of space" and time-dependence of the "scaling factor" is obviously now a compounding, related issue, which lay outside Hubble's purview. Hubble's law does not specify, based upon the observed redshift (whether non-Doppler or not) what is (i.e. is now) the distance between us and the galaxy. It is considered simplest to assume that the velocity of separation is and continues radially uniform, and therefore has increased during the time it took the light to reach us. If you need to know the current (our observing time) location of the remote galaxy and the velocity of its separation from us now, you will need to apply further calculations to the Hubble data.