hi please help. choose which letter to best describe the question thanks

6. Which list below contains only scalar quantities? A. time, volume, distance B. density, flux, weight C. mass, energy, momentum D. force, work, pressure 7. A helicopter rises 1 km up then travels 8 km right. How can this motion be represented by vectors? A. (3) B. (6) + (8 ) C. (1) + (8) D. 9 8. Given a three-dimensional vector u, what is the resultant of u - u? A. (8) B. O C. 0 D. T 9. The magnitude and direction of ( 60 ) are, respectively: A. V71 and 5.5 B. 61 and -79.60 C. 3721 and 79.60 D. 71 and -5.50 10. Which of the following arrows could represent the vector (26) ? A. B. C. D