Problem 1 (5 pts): The vector V1=(300,-400) Newtons represent the force a student applies to a box she is trying to move. What is the magnitude of the resultant vector in Newtons and
the direction of the resultant vector (here provide an angle relative to the x-axis)?.

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?