A whistle producing sound waves of frequencies 9500 Hz and above is approaching a stationary person with speed v ms^-1. The velocity of sound in air is 300 ms^-1. If the person can hear frequencies up to 10000 Hz, the maximum value of v upto which he can the whistle is

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A guitar produces a sound which has a frequency of 300 Hz and a wavelength of 1.3 m. Calculate the speed with which this sound travels.

The correct option is D 390 ms−1 Given: Frequency, f=300 Hz Wavelength, λ=1.3 m. The wave velocity v, frequency f, and wavelength λ are related as: v=fλ. v=300×1.3=390 ms−1. Therefore, the speed with which this sound travels is 390 ms−1

A guitar produces a sound which has a frequency of $300 H z$ and a wavelength of $1.3 m$ . Calculate the speed with which this sound travels.

The correct option is D $390 m s^{- 1}$
Given:
Frequency, $f = 300 H z$
Wavelength, $λ = 1.3 m$ .

The wave velocity $v$ , frequency $f$ , and wavelength $λ$ are related as:
$v = f λ$ .
$v = 300 \times 1.3 = 390 m s^{- 1}$ .
Therefore, the speed with which this sound travels is $390 m s^{- 1}$