Useful data
Speed of light = 300 000 000 m/s
The
Wave Equation
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Speed of light = 300 000 000 m/s
Speed of radio waves = 300 000 000 m/s
Speed of sound in air = 340 m/s
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- A
water wave has a frequency of 2 Hz and a wavelength of 10cm (trap).
Calculate its velocity. 0.2 m/s
- A
certain metal sound of wavelength 4.3 m has a frequency of 1500 Hz.
Calculate its velocity. 6450 m/s
- The
frequency of a radio station is 1 200 kHz. What wavelength does it
transmit on? 250m
- A
certain note has a wavelength of 15cm. Calculate its frequency.2266.7 Hz
- A
ray of light has a wavelength of 0.000 000 006m. Calculate its frequency. 5 x1014 Hz
- A
radio station broadcasts on 1760m. Calculate its frequency. 170 kHz
- The
lowest frequency that the human ear can detect is 20Hz (approx). 1.7m The highest is 20 kHz 1.7 mm(trap). Work out the wavelengths of these
frequencies.
- The
distance between successive crests of a sea wave is 4 m. They pass a
stationary observer every 20 seconds. What is the velocity of the wave?
- Ripples
pass along a pond. The distance between successive crests is 6 cm. The
waves travel 0.5 m in 3 s. v=x/t =0.5/3 = 0.16m/s What
is the wavelength in m 0.06m and the
frequency? 2.67 Hz
- Ripples
pass along a pond at 0.3 m/s. What is their wavelength if the frequency is
6 Hz? 0.05m
Two people stand some distance apart on a
railway line on a still day. One person puts her ear to the rail. The other
hits the rail once with a sledge hammer. The listener hears two bangs, 1
second apart. Explain.
If the speed of sound in steel is 5500m/s
calculate the distance between the listener and the hammerer. 362 m
