1. A wave appears in a pool. Its wavelength is 32 cm, and its frequency is 2 Hz. What is its spread velocity?
2. An earthquake can produce three kinds of waves. One of them is transversal wave of the type called S-wave. The S-wave moves with a spread velocity of 5,000 m/s. its wavelength is 417 m. what is its frequency?
3. A flute produces a sound wave with a wavelength of 2.0 m and a spread velocity of 340 m/s. What is its frequency?
Source: science student book grade VIII