Search results
1 godzinę temu · where v c is the isothermal sound speed. The equation has critical point at v = v c, through which the solution should pass, so that the flow at a great distance is supersonic.The initial speed cannot be arbitrary, and must be quite definite (~10 km s −1).At a temperature 10 6 K, Eq. gives at a distance of 1 AU a speed of about 300 km s −1This is quite consistent with the slow solar wind.
1 godzinę temu · After invention of spectroheliographs and monochromatic filters, flares began to be observed much more often in Hα and some other chromospheric spectral lines.An Hα monochromatic image of a flare often shows two bright ribbons, the distance between which increases with time (Fig. 10.2).The area of emitting regions is from several millionths to several thousandths of the solar hemispheres.
1 dzień temu · Zero-point energy (ZPE) is the lowest possible energy that a quantum mechanical system may have. Unlike in classical mechanics, quantum systems constantly fluctuate in their lowest energy state as described by the Heisenberg uncertainty principle. Therefore, even at absolute zero, atoms and molecules retain some vibrational motion.Apart from atoms and molecules, the empty space of the vacuum ...
