d. 4 For item nos. 5-10, refer to the di 6 7 10 9 3 8 5.0 cm C. 3 and 6 5. d. Which two points are in-phase? 1 and 5 b. 2 and 6 4 and 7 a. C. 3 and 10 6. Which two points are out-of-phase? 1 and 6 b. 2 and 5 a. d. 4 and 9 What is the frequency in cycle/second of the periodic wave g 4 given? 7. C. 2 a. d. 4.5 8. C. 12 cm/s b. 2.5 What is the speed of the wave? 10 cm/s b. 10.5 cm/s a. d. 12.5 cm/s 9. What is the wave's period? 0.2 s C. 0.4 S a. d. 0.5 s b. 0.3 S 10. One wavelength in the periodic wave given is the distance between what C. 3 and 6 1 and 6 a. d. 4 and 8 b. 2 and 8 C. 11. Which of the following properties of a wave is independent of each other amplitude speed b. frequency d. wavelength a.