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2 cards from this section. Quick, good the night before a test.
What is a wave?
Think about how energy moves without physical matter.
Give an example of a mechanical wave.
Consider waves that need a medium to travel.
What type of wave requires a medium to travel?
Think about sound and water waves.
True or False: Electromagnetic waves can travel through a vacuum.
Consider sunlight reaching Earth from space.
A wave has a frequency of 5 Hz and a wavelength of 2 meters. What is the speed of the wave?
Remember to multiply frequency by wavelength.
If the speed of sound is 343 m/s at room temperature, calculate the speed of sound at 0 degrees Celsius using the formula v = 331 + 0.6 × T.
Make sure to substitute the temperature correctly.
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