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原题(1)某同学漂浮在海面上,虽然水面波正平稳地以1.8 m/s的速率向着海滩传播,但他并不向海滩靠近。该同学发现从第1个波峰到第10个波峰通过身下的时间间隔为15 s。下列说法正确的是__。A.水面波是一种机械波B.该水面波的频率为6 Hz C.该水面波的波长为3m D.水面波没有将该同学推向岸边,是因为波传播时能量不会传递出去E.水面波没有将该同学推向岸边,是因为波传播时振动
The original question (1) A classmate floats on the surface of the sea. Although the surface wave is spreading steadily toward the beach at a rate of 1.8 m / s, he does not approach the beach. The classmate found that the time interval from the first peak to the 10th peak was 15 s. The following statement is correct __. A. The surface wave is a mechanical wave B. The frequency of the surface wave is 6 Hz C. The wavelength of the surface wave is 3 m D. The surface wave does not push the classmate ashore because the energy is not transmitted when the wave propagates E. Surface wave did not push the classmate ashore because of the vibration during the wave propagation