If two objects are electrically attracted to each other
both objects must be negatively charged.
both objects must be positively charged.
one object must be negatively charged and the other object must be positively charged.
the objects could be electrically neutral.
none of the above statements are absolutely true

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].