Kim demonstrates to her father the movement and properties of longitudinal waves. They each hold one end of the spring (slinky). Kim quickly moves the spring forwards and backwards to the original position so that a range of pulses moves along the spring. It takes 1,8s for a wave from one end of the spring to the other end. The length of the spring is 6,3 m. .

Question

Kim demonstrates to her father the movement and properties of longitudinal waves. They each hold one end of the spring (slinky). Kim quickly moves the spring forwards and backwards to the original position so that a range of pulses moves along the spring. It takes 1,8s for a wave from one end of the spring to the other end. The length of the spring is 6,3 m. .

1,8 calculate the speed of the waves in the spring
1,9 The distance from the middle of the first compression to the middle of the last compression is 5,75 m, as shown in the sketch. indicate that the wavelength of the waves in the springs is 1,92 m
1.10 calculate the frequency of the waves in the spring
1.11 calculate the period of the waves in the spring
1.12 what happens with the wave when it hits the fathers hand?

Answer 1

1. The speed of the waves in the spring can be calculated using the formula:

Speed = Distance/Time
Speed = 6.3m/1.8s
Speed = 3.5 m/s

1.9 The wavelength of the waves in the spring can be determined by measuring the distance from the middle of the first compression to the middle of the last compression. Given that this distance is 5.75 m, we can conclude that the wavelength is 1.92 m.

1.10 The frequency of the waves can be calculated using the formula:
Frequency = Speed/Wavelength
Frequency = 3.5 m/s / 1.92 m
Frequency ≈ 1.82 Hz

1.11 The period of the waves can be calculated using the formula:
Period = 1/Frequency
Period = 1/1.82 Hz
Period ≈ 0.55 s

1.12 When the wave hits the father's hand, it will undergo reflection. This means that the wave will bounce back and change direction, moving in the opposite direction. The wave will continue to propagate along the spring, but in the opposite direction from where it came.

Answer 2

hi I just have one more question

2. 2.1 distinguish between a transverse wave and a longitudinal waves by completing the following table.
Properties__________________________ Transverse wave ____________________ Longitudinal wave
*direction of disturbance
*does it need a medium
*description of amplitude
*description of period
*description of frequency
*description of wavelength
*sketch of wave
*wave equation
*example(s)

Answer 3

Properties______ Transverse wave Longitudinal wave

*direction of disturbance - Perpendicular to the direction of wave propagation - Parallel to the direction of wave propagation
*does it need a medium - Yes, requires a medium to propagate - Yes, requires a medium to propagate
*description of amplitude - Maximum displacement of particles from their equilibrium position - Compression and rarefaction of particles
*description of period - Time taken to complete one full cycle - Time taken for the wave to pass through one point
*description of frequency - Number of complete cycles per unit time - Number of waves passing through a point per unit time
*description of wavelength - Distance between two consecutive compressions or rarefactions - Distance between two consecutive points in the same phase
*sketch of wave - Transverse waves are depicted with crests and troughs - Longitudinal waves are depicted with compressions and rarefactions
*wave equation - y = A sin (kx - ωt) - y = A sin (ωt ± kx)
*example(s) - Light waves, water waves - Sound waves, seismic waves