Sound WavesHard

Question

A copper wire is fixed between two rigid supports. It is stretched with negligible tension at 30oC. The speed of transverse waves in the wire at 10oC will be - (density d = 9 × 103 kg/ m3, Young′s modulus Y = 1.3 × 1011 N/m2 and temperature coefficient of expansion a = 1.7 × 10-5 /oC) : -

Options

A.210 m / s
B.110 m/s
C.90 m/s   
D.70 m/s

Solution

ᐃL = αθAy
μ = dA ∴ v = = 70m/s

Create a free account to view solution

View Solution Free
Topic: Sound Waves·Practice all Sound Waves questions

More Sound Waves Questions

A student is experimenting with resonance tube apparatus in Physics lab to find the speed of sound at room temperature. ...Which of the following statements are wrong about the velocity of sound in air:...A source emits a sound of frequency 400 Hz but the listener hears it to be 390 Hz then :-...A string in a musical instrument is 50 cm long and its fundamentlal frequency is 800 Hz. If a frequency of 1000Hz is to ...In an organ pipe whose one end is at x = 0, the pressure is expressed by P = P0 cos sin 300πt where x is in meter a...