If you were in a spaceship travelling at 0.80 c away from a star, at what speed would the star's light pass you? Still travelling at 0.80 c you see another spaceship approaching you, and the star. You measure its speed to be 0.84 c.

What is the other spaceship's speed in the star's frame of reference?

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].