Rex and Tex board the bumper cars at the local carnival. Rex and their car weigh 211 kg while Tex and his cart weigh 217 kg. Rex is moving at a full speed of 2.05 m/s when they rear-end Tex who is at rest in their path. Tex and his car lunge forward at 1.40 m/s. Determine the post-collision speed of Rex and their car.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

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].