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What is the unit of frequency?
Hertz
If a wave has a wavelength of 2 m and a frequency of 5 Hz, what is its speed?
10 m/s
What happens to the speed of a wave if the frequency increases while the wavelength remains the same?
Increases
A wave has a frequency of 250 Hz and a wavelength of 4 m. Calculate its speed?
1000 m/s
What happens when light travels from air into water?
It slows down and bends
What is the correct order of visible light colors in a rainbow?
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Explain why a pencil appears bent when placed in a cup of water.
refraction
What type of wave is a sound wave?
Longitudina
Why does sound travel faster in solids than in gases?
Because molecules in solids are closer together
In which medium can sound not travel?
vacuum
If the speed of sound in steel is 5000 m/s, how long will it take for a sound wave to travel 2 km through steel?
0.4 seconds
What does the amplitude of a sound wave determine?
loudness
A sound wave with a high frequency has _______ pitch
high
Sounds louder than __ dB can cause hearing damag
120
A tuning fork produces a sound with a frequency of 500 Hz and a wavelength of 0.68 m. Calculate the speed of the sound wave.
340 m/s
What is the human audible range of hearing?
20 Hz - 20,000 Hz
