1. Let velocity vector be V = 3 i + 15 j - 12 k . What is the magnitude of V ? Please round your answer to one decimal place.

2.

Three vectors A, B, and C add together to yield zero: A + B + C = 0. The vectors A and C point in opposite directions and their magnitudes are related by the expression: A = 3C. Which one of the following conclusions is correct? O B and C point in the same direction, and they have equal magnitudes O A and B have equal magnitudes and point in opposite directions O B and C point in the same direction, but B has twice the magnitude of C O B and C point in opposite directions but B has twice the magnitude of C. O A and B point in the same direction, but B has twice the magnitude of A.An airplane traveling north at 520 m/s is accelerated due east at a rate of 30 m/s for 13 s. If the effects of air resistance and gravity are ignored, what is the final speed of the plane? O 500 m/s O 650 m/s 700 m/s O 800 m/s O 600 m/s