## PLEASE HELP ME!!!! I’LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY!!!!! I NEED THESE DONE TODAY!!!! The speed of sound in

Question

PLEASE HELP ME!!!! I’LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY!!!!! I NEED THESE DONE TODAY!!!!

The speed of sound in air at 20 deg C. is approximately 340 m/s

True
False
Wave speed = wave frequency x wave length

True
False

Because f=1/period, wave speed = wavelength/period

True
False

What is the wavelength of a sound wave that has a speed of 340m/s and a frequency of 440 hz

0.773 m

149,600 m

1.29 m

What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 2.0 m?

25 m/s

100 m/s

0.04 m/s

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5 months 2021-08-24T13:03:39+00:00 1 Answers 3 views 0

## v = 100 m/s

Explanation:

1)

As we know by the formula of speed of sound we have    So approx speed of the sound is nearly 340 m/s

so its TRUE

2)

Wave speed is given as so it is given as TRUE

3) so from above equation we have  4)

Wavelength is given as   5)

As we know that  so we will have   