Mapa del sitio . ... El movimiento circular, sin embargo, necesita fuerzas para existir. Imagine que tiene una piedra amarrada a una cuerda y est movi ndola en c rculos de radio R (metros). ... Como su velocidad v es igual a la distancia que se mueve en un segundo, vemos que . ... Si tomamos el movimiento desarrollado en un momento muy breve , el trayecto AB cubierto es tan peque o que su curvatura se puede desechar, permitiendo ver el movimiento como si fuese en l nea recta, con una velocidad v . ...

spaceweb@oulu.fi - last update: 23 November 1998, 1700 UT (RR) . ... Planck's constant . ... Boltzmann's constant . ... Gravitational constant . ... Charge of proton . ... Rest mass of proton . ... Rest mass of electron . ... Rest mass of neutron . ... Proton/electron mass ratio . ... Unified atomic mass unit . ... Classical electron radius . ... 6.022 в 10 23 mol -1 . ... 22.4 в 10 -3 m 3 /mol . Gas constant . ... The 1986 CODATA Recommended Values of the Fundamental Physical Constants . ...

Comets necessarily obey the same physical laws as every other object. ... If one considers only two bodies -- either the Sun and a planet, or the Sun and a comet -- the smaller body appears to follow an elliptical path or orbit about the Sun, which is at one focus of the ellipse. ... Another quantity that is conserved is called angular momentum. ... Comets simply are bodies which in general have more angular momentum per unit mass than do planets and therefore move in more elongated orbits. ...

Cosmic Research, Vol. 42, No. 5, 2004, pp. 435­488. Translated from Kosmicheskie Issledovaniya, Vol. 42, No. 5, 2004, pp. 453­508. Original Russian Text Copyright © 2004 by Veselovsky, Panasyuk, Avdyushin, Bazilevskaya, Belov, Bogachev, Bogod, Bogomolov, Bothmer, Boyarchuk, Vashenyuk, Vlasov, Gnezdilov, Gorgutsa, Grechnev, Denisov, Dmitriev, Dryer, Yermolaev, Eroshenko, Zherebtsov, Zhitnik, Zhukov, Zastenker, Zelenyi, Zeldovich, Ivanov-Kholodnyi, Ignat'ev, Ishkov, Kolomiytsev, Krasheninnikov, Kudela,