1/ Explain the formation of beats by the superposition of sounds of two closely spaced frequencies.
2/ Explain the increase or decrease in detected frequency due to the Doppler effect, with either source and/or listener moving.
3/ Explain why a different Doppler effect formula applies for electromagnetic waves; use that formula.
4/ Explain the characteristics of supersonic motion and the formation of shock waves.
5/ Use the expression relating shock cone half angle to the Mach number.