Answers?

1. The period of a wave is 5 s. Calculate its frequency. 2. The period of a wave is 4 s. Calculate its frequency. 3. One cycle of a wave is 1.3 s long. What is its frequency? 4. The frequency of a wave is 7 Hz. Find the period of the wave. What will be the wave period if frequency is doubled? How change in frequency will affect wave speed and wavelength? 5. The frequency of a wave is 350 Hz and the wavelength is 5m. What is its velocity? 6. A dog whistle is designed to produce a sound with a frequency beyond that which can be heard by humans (between 20 000 Hz and 27 000 Hz). If a particular whistle produces a sound with a frequency of 2.5 x 104 Hz, what is the sound's wavelength? Assume the speed of sound in air is 331 m/s. 7. The lowest pitch that the average human can hear has a frequency of 20.0 Hz. If sound with this frequency travels through air with a speed of 331 m/s, what is its wavelength