In an orchestra,the musical sounds of different instruments are distinguished from one another by which of the following characteristics?

Two waves having sinusoidal waveforms have different wavelengths and different amplitudes. They will have:

If the threshold of hearing is assumed to be the reference $(0 \ dB)$,then the threshold of pain is taken to be $120 \ dB$. Let the corresponding sound intensities be $I_0$ and $I$ respectively. Then $\frac{I_0}{I}$ is:

In the musical octave 'Sa','Re','Ga',which of the following statements is correct regarding their frequencies?

The power of sound from the speaker of a radio is $20 \text{ mW}$. By turning the knob of the volume control,the power of the sound is increased to $200 \text{ mW}$. The power increase in decibels as compared to the original power is $.... \text{ dB}$.

$A$ small speaker delivers $2\, W$ of audio output. At what distance from the speaker will one detect $120\, dB$ intensity sound in $cm$?