6.1 The data below was obtained during an investigation into the relationship between the different velocities of a moving sound source and the frequencies detected by a stationary listener for each velocity. The effect of wind was ignored in this investigation.
6.1.1 Write down the dependent variable for this investigation. (1)
6.1.2 State the Doppler effect in words. (2)
6.1.3 Was the sound source moving TOWARDS or AWAY FROM the listener? Give a reason for the answer. (2)
6.1.4 Use the information in the table to calculate the speed of sound during the investigation. (5)
6.2 The spectral lines of a distant star are shifted towards the longer wavelengths of light. Is the star moving TOWARDS or AWAY FROM the Earth? (1)
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