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18 godz. temu · Hubble's law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth. The velocity of the galaxies has been determined by their redshift, a shift of the light they emit toward the red end of the visible ...
18 godz. temu · 1. Show that the acceleration \( \boldsymbol{a} \) of a particle which travels along a space curve with velocity \( v \) is given by \[ a=\frac{d v}{d t} T+\frac{v^{2}}{R} N \] Where \( T \) is the unit tangent vector to the space curve, \( N \) is its unit principal normal and \( \mathrm{R} \) is the radius of curvature.
