A steel wire has a length of 12 m and a mass of 2.10 kg. What will be the speed of a transverse wave on this wire when a tension of 2.06\(\times \)10⁴N is applied?

2

(a)

A tuning fork A, marked 512 Hz, produces 5 beats per sec, where sounded with another unmarked tuning fork B. If B is loaded with wax, the number of beats is again 5 per sec. What is the frequency of the tuning fork B when not loaded?

2

(a)

A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a source of 1237.5 Hz? (sound velocity in air = 330ms^-1)

2

(a)

Equation of a plane progressive wave is given by y = 0.6 sin\(2\pi \left( t-\frac { x }{ 2 } \right) \) On reflection from a denser medium, its amplitude becomes 2/3 of the amplitude of  incident wave. What will be equation of reflected wave?

2

(a)

At what temperature (in ⁰C) Will be speed of sound air be 3 times its value at 0⁰ C?

2

(a)