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- 1. Fill in the Blank
A firework is fired straight upwards. It explodes 272 m above the ground. It takes the sound wave from the firework 0.8 s to reach the ground. Calculate the speed of sound in air.
- 2. Fill in the Blank
A paddle vibrating up and down in a pool is used to produce waves on the water. The wavelength of each wave is 1.2 m and exactly 2 complete waves are produced per second. Calculate the speed of the wave.
- 3. Fill in the Blank
A wave has a frequency of 4.0x107 Hz and a speed of 3.0x108 m/s. Calculate its wavelength.
- 4. Fill in the Blank
A water wave is generated by a wave machine in a pool. The wave travels to the end of the pool, is reflected, and travels back to the wave machine. It takes 8.0 seconds for the wave to return to the machine once it has been generated. The wave travels at a speed of 4.5 m/s. How far from the end of the pool is the wave machine?
- 5. Multiple Choice
Select the correct equation to answer the question: "Calculate the speed of a wave which travels 100 m in 0.5 s."
Speed = distance / time
Speed = frequency x wavelength
Speed = distance x time
Speed = frequency / wavelength
- 6. Fill in the Blank
The speed of sound in seawater is known to be 1500 m/s. A sound wave with a frequency of 3 kHz is produced under water. Calculate the wavelength of this sound wave.
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