A rocket sled accelerates from rest on a level track with negligible air and rolling resistances. The initial mass of the sled is M0 = 600 kg. The rocket initially contains 150 kg of fuel. The rocket motor burns fuel at constant rate ˙m = 15 kg/s. Exhaust gases leave the rocket nozzle uniformly and axially at Ve = 2900 m/s relative to the nozzle, and the pressure is atmospheric. Find the maximum speed reached by the rocket sled. Calculate the maximum acceleration of the sled during the run.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?