A wave in a string has an amplitude of $2\,\, cm.$ The wave travels in the $+ve$ direction of $x-$ axis with a speed of $128\,\, m/s$ and it is noted that $5$ complete waves fit in $4\,\, m$ length of the string. The equation describing the wave is
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A sinusoidal wave of frequency $500 \,Hz$ has a speed of $350 \,m / s$. The phase difference between two displacements at a certain point at times $1 \,m$ apart is ...........
There are three sources of sound of equal intensities with frequencies $101, 103$ and $106\, Hz$. What is the beat frequency heard if all are sounded simultaneously ... $Hz$?
A source of sound emits waves with frequency $f \,Hz$ and speed $V\, m/sec$. Two observers move away from this source in opposite directions each with a speed $0.2\, V$ relative to the source. The ratio of frequencies heard by the two observers will be
The frequency of a sonometer wire is $f$, but when the weights producing the tensions are completely immersed in water the frequency becomes $f/2$ and on immersing the weights in a certain liquid the frequency becomes $f/3$. The specific gravity of the liquid is:
What should be the velocity of a sound source moving towards a stationary observer so that apparent frequency is double the actual frequency (Velocity of sound is $v$)
If two waves represented by $y_1 = 4\, \sin\, \omega t$ and ${y_2} = 3\sin \,\left( {\omega t + \frac{\pi }{3}} \right)$ interfere at a point, then amplitude of the resulting wave will be about