Question
Download Solution PDFA sound wave has a frequency of 1000 Hz and wavelength of 50 cm. How long will it take to travel a distance of 500 meters?
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Army Soldier Technical (BEG Center, Kirkee - PUN) 28 Feb 2021 Official Paper
Answer (Detailed Solution Below)
Option 2 : 1 s
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Indian Army Agniveer Technical 2023 Memory Based Paper.
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CONCEPT:
- Frequency (f): In physics, it is defined as the number of waves that pass in a fixed time is known as frequency.
- Wavelength (λ): The distance between two crests and troughs is called wavelength.
CALCULATION:
Given that:
Frequency = 100 Hz
Wavelength = 50 cm = 0.5 m
Speed of sound = frequency × wavelength = 1000 × 0.5 = 500 ms-1
Speed = Distance/Time
500 = 500/Time
T = 500/500 = 1sec
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