A quartz crystal of thickness 0.001m is vibrating at resonance. Calculate the fundamental frequency. Density of quartz = 2.650×103 kg/m3 and Young’s modulus for quartz = 7.9×1010 N/m2.

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1.	A quartz crystal of thickness 0.001m is vibrating at resonance. Calculate the fundamental frequency. Density of quartz = 2.650×103 kg/m3 and Young’s modulus for quartz = 7.9×1010 N/m2.
A.	2.7299×106MHz
B.	26.50×103Hz
C.	2.093×106Hz
D.	2.7299×1010MHz
Answer» B. 26.50×103Hz

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