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MDCAT Practice Test - Practice Test - Physics - Waves Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Physics - Waves | Quiz 9

81. The wavelength of a 440 Hz tuning fork changes by how much when temperature rises from 0°C to 20°C? (v₀=331 m/s)



82. A string has fundamental frequency 100 Hz. Tension is increased by 44%. New fundamental frequency is:



83. A wave has λ=2 m at 200 Hz. If frequency is increased to 400 Hz (same medium), new λ is:



84. Calculate speed of sound in air at 27°C (γ=1.4, M=0.029 kg/mol, R=8.314).



85. Speed of sound in air is 330 m/s. What is speed in hydrogen (M_H=2 g/mol, M_air=29 g/mol)?



86. The second harmonic of a stretched string is 120 Hz. What is the third harmonic?



87. A 1 kHz sound wave travels from air into water. Speed in air=340 m/s, in water=1500 m/s. Ratio of wavelength in water to that in air is:



88. Two coherent sound sources of frequency 680 Hz produce constructive interference. What is the minimum path difference? (v=340 m/s)



89. Minimum path difference for destructive interference of two 680 Hz waves (v=340 m/s) is:



90. A string of length 0.5 m, mass 5 g, tension 100 N. Find fundamental frequency.



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