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 3
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![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 3](/uploads/image/z/5087729-65-9.jpg?t=SAT2+waves+%E5%B7%B4%E6%9C%97%E4%B8%8A%E4%B8%80%E9%81%93%E9%A2%98A+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%2Cand+the+speed+of+sound+in+air+is+3)
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 3
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?
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 3
额.我不知道有多少人可以看懂你的题,但是至少我明白了.
这道题的sound speed是迷惑条件,powder的分布与它无关.
The waves set up by diaphragm 在tube的另一端反射回来,与入射的waves叠加形成驻波.
因为tube中除了波节处空气都在震动,只有波节处是稳定位置,因此fine powder一定聚集在驻波波节处.由fine powder分布可知,两波节间距为1cm,波长为二倍波节间距,因此wavelength is 2cm
英文题目看不懂,可以发中文吗?