Physicsmedium · Past Paper
What is the wavelength of a sound wave with a frequency of 20 Hz in air where the speed of sound is 340 m/s?
A17 m
B6.8 m
C0.058 m
D6800 m
✓ Correct Answer: A — 17 m
lambda = v / f = 340 / 20 = 17 meters.
Share this question
More from Physics
- Work done is said to be zero if the angle between force and displacement is:
- A transformer has 200 turns in the primary coil and 1000 turns in the secondary coil. If the primary voltage is 220V, what is the secondary voltage?
- If the density of a body is equal to the density of the liquid:
- A spring is stretched by 2 cm. If the spring constant is 100 N/m, the energy stored is:
- Which of the following determines whether an object will sink or float in a liquid?