Question

The wavelength of the sound emitted by a tuning fork in air is 3m. Speeds of sound in air and in water are 330 m/s and 1400 m/s respectively. Wavelength of this sound in water is

Answer 1

Explanation:

for same frequency, wavelength is proportional to speed.

wavelength in water = 3 * 1400/330 = 12.72 m

Answer 2

Answer:

• 110 Hz
• 12.73 m

Explanation:

Given

• Air (λ) = 3 m
• Air (V) = 330 m/s
• Water (V) = 1400 m/s
• Water (f) = 110 Hz

To find

• Air (f)
• Water (λ)

Solution

• V = fλ
• f = V/λ
• f = 330/3
• f = 110 Hz

Now:

• V = 1400 m/s
• f = 110 Hz
• V = fλ
• λ = V/f
• λ = 1400/110
• λ = 12.73 m