Figure shows a sinusoidal wave at a given instant Which points are in same phase ?
$A, B$
$B, C$
$B, D$
$C, E$
A pulse shown here is reflected from the rigid wall $A$ and then from free end $B.$ The shape of the string after these $2$ reflection will be
Fundamental frequency of sonometer wire is $n$. If the length, tension and diameter of wire are tripled, the new fundamental frequency is
A sound absorber attenuates (decreases) the sound level by $20\, dB$. The intensity decreases by a factor of
The amplitude of a wave represented by displacement equation $y = \frac{1}{{\sqrt a }}\,\sin \,\omega t \pm \frac{1}{{\sqrt b }}\,\cos \,\omega t$ will be
Speed of sound waves in a fluid depends upon