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7. In a standing wave whose wavelength is 1, thedistance between two adjacent antinodes is Multiple-Choice (10 Points) Ο
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7. In a standing wave whose wavelength is 1, thedistance between two adjacent antinodes is Multiple-Choice (10 Points) Ο
7. In a standing wave whose wavelength is 1, thedistance between two adjacent antinodes is Multiple-Choice (10 Points) Ο Α. λ/2 ов. Х O C.31/4 O D. 1/4 8. The expression of mechanical wave is y = 0.03 cos 6(t + 0.012)(SI), then Multiple-Choice (10 Points) O A. its wave speed is 10 m/s. O B. it propagates in +3 direction. O C. its period is (1/3) s. O D. its amplitude is 3 m.