1) How is the frequency of a wave best described? a) 2040m b) The number of waves per second c) Long waves diffract more than short waves. d) 5m 2) If the frequency of a wave is 20Hz, what is the period of the wave? a) 2040m b) The defintion of any speed is the distance travelled in a known time period, in this case = 1 second. c) The amplitude of a wave is half the height from peak to trough or the distance from the rest positions (middle) to peak or trough. d) 0.05s 3) What is the amplitude of a wave that is 0.6m from peak to trough? a) The amplitude of a wave is half the height from peak to trough or the distance from the rest positions (middle) to peak or trough. b) 0.24m c) 5x1014 Hz d) 0.05s 4) How is the speed of a wave defined? a) 2.5Hz b) The number of waves per second c) 0.05s d) The defintion of any speed is the distance travelled in a known time period, in this case = 1 second. 5) If the period of wave is 400ms (0.4s) , what is the frequency of the wave? a) 2040m b) 1500m s -1 c) 2.5Hz d) 0.24s 6) What is the wavelength of the wave? a) 0.24m b) 5m c) 3.37m d) 1500m s -1 7) Which of the following is a longitudinal wave? a) 0.24m b) 0.24s c) 5m d) Sound waves are longitudinal waves. 8) If a student sees the flash of lightning strike and then hears the thunder six seconds later, how far away is the storm? a) The amplitude of a wave is half the height from peak to trough or the distance from the rest positions (middle) to peak or trough. b) 2040m c) Diffraction is when a wave bends around an object. d) 0.24m 9) If an ultrasound pulse travels a total distance of 6 cm (0.06 m) to and from an organ and takes 40µs (4x10 -5s) what is the speed of sound in the tissue? a) 0.24m b) 5m c) Diffraction is when a wave bends around an object. d) 1500m s -1 10) If a water wave has a wavelength of and a frequency of 1440Hz, what is the speed of the water wave? a) 2040m b) 0.75m s -1 c) 0.05s d) The number of waves per second 11) If a sound wave in air has a frequency of , what is the wavelength of the wave? a) 2040m b) Diffraction is when a wave bends around an object. c) 1500m s -1 d) 0.24m 12) What is the wavelength of a radio wave of frequency 89 MHz? a) 2040m b) 3.37m c) The defintion of any speed is the distance travelled in a known time period, in this case = 1 second. d) 0.75m s -1 13) A streetlamp can emit a light of wavelength 6x10-7m. What is the frequency of this light? a) The number of waves per second b) 0.24m c) 5x1014 Hz d) 2.5Hz 14) If the distance to a satellite is 36,000km , how long does it take a signal to get from the transmitting station to a receiving station back on Earth? Be careful there are two points to watch for. a) 0.24s b) 5x1014 Hz c) 0.75m s -1 d) The defintion of any speed is the distance travelled in a known time period, in this case = 1 second. 15) What is diffraction? a) Diffraction is when a wave bends around an object. b) The defintion of any speed is the distance travelled in a known time period, in this case = 1 second. c) 2040m d) 0.24s 16) Which of the following radio signals will reach a village in the bottom of a valley best? a) 5x1014 Hz b) 3.37m c) Long waves diffract more than short waves. d) 0.24m

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