1. Wave Equations

2. Frequency Frequency is the number of cycles per time second – the unit is hertz. One cycle is measured from peak to peak or trough to trough. 2 cycles per second = 2 hertz

3. Period Is the time it take for a wave to pass a certain point. Period = 1/frequency or T= 1/f Example if a bird flaps at a frequency of 121 hertz (cycles per second). The period is 1/121 = ~0.00826 seconds Frequency equals 1/period 1/0.00826 = ~121 hertz

4. The Wave Equation Speed = Wavelength Frequency

5. Work out the speed of these slinky waves. MediumWavelengthFrequencySpeed Zinc, 1-in. dia. coils1.75 m2.0 Hz______ Zinc, 1-in. dia. coils0.90 m3.9 Hz______ Copper, 1-in. dia. coils 1.19 m2.1 Hz______ Copper, 1-in. dia. coils 0.60 m4.2 Hz______ Zinc, 3-in. dia. coils0.95 m2.2 Hz______ Zinc, 3-in. dia. coils1.82 m1.2 Hz______