Full Steel
A long steel pipe closed at both ends is full of water. When it is struck in 1 end, an observer at the other..?
A long steel pipe closed at both ends is full of water. When it is struck in 1 end, an observer at the other end would hear three sounds.
WHY DOES THIS OCCURS?
Sound travels in all kinds of media but the velocity varies according to the density of the medium. In this particular case, you have steel, water and surrounding it all, air. Thus, when one end is struck, same impact will produce three sound wave fronts – in air, in water & in steel but all the three fronts will travel at different speeds. Thus the man would hear the same impact thrice.
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