1. A child sitting at the end of a dock notices that 8 wavelengths pass by in 4 seconds. What is the frequency of the waves passing the dock?

2. What is the period of the waves from the previous question?

3. Using the diagram below, determine the wavelength and amplitude of the wave:

4. A pendulum oscillates 12 times in 4 seconds.

a. What is the frequency of the oscillations?

b. What is the period of the oscillations?

c. What is the length of the pendulum?

5. A pendulum is 0.25 m long. What is the frequency of its oscillations?

6. A water wave has a frequency of 2 Hz, and there are 3 m between each crest on the wave. How fast is the wave moving?

7. Sound waves travel at roughly 340 m/s at room temperature. The minimum hearing range of a human is 20 Hz. What is the wavelength of a sound wave?

8. If a spring requires 20 N to be compressed a distance of 10 cm, what is its spring constant (N/m)?

9. How much potential energy is stored in the spring from the previous question?

1. Determine the wavelength of the longitudinal wave below:

2. A sound wave is determined to have a frequency of 1,000 Hz and a wavelength of 35 cm. What is the speed of this wave?

3. If the sound wave in the previous question is measured in air, what is the temperature of the air?

4. What is the speed of sound in air with a temperature of 25 C?

5. The hottest recorded temperature in United States history is 134 F, which is 57 C. What is the speed of sound at this temperature?

6. The human range of hearing is between 20 and 20,000 Hz. What is the corresponding range in wavelengths for sound in air at 25 C?

7. The speed of sound in water is 1,500 m/s. What is the wavelength of a sound wave with a frequency of 15,000 Hz in water?

8. How much louder is a 70 dB sound compared to a 50 dB sound?