A resonant system has a fundamental frequency of 100 Hz. If the next higher frequency that gives a resonance are 300 Hz and 500 Hz, the system could be (a) A pip open at both ends (b) A pipe closed at both ends (c) A string vibrating between two fixed points (d) A pipe open at one end and closed at the other

A resonant system has a fundamental frequency of 100 Hz. If the next higher frequency that gives a resonance are 300 Hz and 500 Hz, the system could be (a) A pip open at both ends (b) A pipe closed at both ends (c) A string vibrating between two fixed points (d) A pipe open at one end and closed at the other
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