Question

Q⟩ Gogi is singing a song of Frequency 500 Hz and have a Wavelength of 20 cm . So how much time will it take to reach a person's ear who is standing 300 m away from Gogi ?

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Answer 1

..QUESTION..

Q⟩ Gogi is singing a song of Frequency 500 Hz and have a Wavelength of 20 cm . So how much time will it take to reach a person's ear who is standing 300 m away from Gogi ?

..ANSWER..

Given ,

ㅤㅤㅤ➪ Frequency = 500 Hz

ㅤㅤㅤ➪ Wavelength = 20 cm

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ = 0.2 m [ S.I unit ]

ㅤㅤㅤ➪ Distance ㅤ = 300 m

•°• At first ,

➪ Speed = Wavelength × Frequency

ㅤㅤㅤ➪ Speed = λ × v

ㅤㅤㅤ➪ Speed = 0.2 × 500

ㅤㅤㅤ➪ Speed = 100 m/s

☯︎ We Know That ,

ㅤㅤㅤ➪ speed = dist. / time

ㅤㅤㅤ➪ v = d / t

ㅤㅤㅤ➪ t = d / v

ㅤㅤㅤ➪ t = 300 / 100

ㅤㅤㅤ➪ t = 3 s

•°• The person will hear the sound after 3 seconds

ㅤㅤㅤ꧁ ʙʀᴀɪɴʟʏ×ᴋɪᴋɪ ꧂

ㅤㅤㅤ

Answer 2

Answer:

see the attachment

hope it helps