A train of sound waves are propagated along a wide pipe and it is reflected from an open end. If the amplitude of the waves is 0.002 cm, the frequency is 1000 Hz and the wavelength is 40 cm, the amplitude of vibration at a point 10 cm from open end inside the pipe will be
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A
At 10 cm distance from open end or at distance 
from the open end, there should be a node.
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