A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?

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Q: 33 (NDA-I/2022)
A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,16,30,15,10,5,16

keywords: 

{'frequency': [0, 0, 1, 3], 'wavelength': [0, 0, 3, 3], 'sound wave': [0, 0, 0, 5]}

The correct answer is option 2: 4 seconds.

To determine the time it takes for the sound wave to travel 1 km, we need to use the formula:

Speed = Frequency x Wavelength

Given that the frequency is 1 kHz (1,000 Hz) and the wavelength is 50 cm (0.5 m), we can plug these values into the formula:

Speed = 1000 Hz x 0.5 m = 500 m/s

Now, to calculate the time it takes to travel 1 km, we divide the distance by the speed:

Time = Distance / Speed = 1000 m / 500 m/s = 2 seconds

Therefore, it will take 2 seconds for the sound wave to travel 1 km.

Alert - correct answer should be option 4: 2 seconds

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