问题描述：
SAT2 waves 巴朗上一道题
A vibrating diaphragm sets up strong vibrations at the mouth of a horizontal tube containing air and a small amount of fine powder.The powder becomes arranged in piles 1 centimeter apart,and the speed of sound in air is 330 meters.
Q：the wavelength of this sound in air is?
答案为什么是 2 cm?
A vibrating diaphragm sets up strong vibrations at the mouth of a horizontal tube containing air and a small amount of fine powder.The powder becomes arranged in piles 1 centimeter apart,and the speed of sound in air is 330 meters.
Q：the wavelength of this sound in air is?
答案为什么是 2 cm?
问题解答：
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