21. What is wrong with the following expressions? How can you correct them? (a) C = AB, (b) C = AB, (C) C = A B, (d) C = AB, (0) C +2Ã = B, (0 C = A x B, (g)Ã B = A * B, (h) C = 2A - B, 0 C = A/B,
and () C = A/B

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

When an object is heated it contracts. a. true b. false

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].