un camión de carga de 15000kg está viajando por una ´pista plana a 5.00 m/s. Subitamente, se deja caer dentro del camión 5000 kg de carbón. La velocidad del carbón en la dirección horizontal es cero. Encuéntrese la rapidez final del camión

What are similarities and differences between refraction, reflection, diffraction and absorption?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?