Quiz 7.4 Properties of Wave

Mechanical waves is a __________ that travels through particles of the medium to transfer the energy

Select 2 types of waves motion.

• Mechanical waves

• Transverse waves

• Longitudinal waves

• Progressive waves

Sound waves is a type of longitudinal waves because the particle in the medium move ___________ to the direction which the wave travels.

Waves on a string is an example of transverse wave because the particles in the medium vibrates _____________ to the direction which the wave travels.

Wave number is ...

• The maximum displacement from the equilibrium position to the crest or trough of the wave motion.

• The time taken for a particle in the wave to complete one cycle.

• The horizontal distance between two successive crests, two successive troughs, or any two successive equivalent points on the wave.

• The number of cycles produced per unit distance

Wavelength is ...

• The maximum displacement from the equilibrium position to the crest or trough of the wave motion.

• The time taken for a particle in the wave to complete one cycle.

• The horizontal distance between two successive crests, two successive troughs, or any two successive equivalent points on the wave.

• The number of cycles produced per unit distance

The figure shows an example of progressive wave. What is x?

• wave displacement

• particle displacement

The figure shows an example of progressive wave. What is y?

• wave displacement

• particle displacement

 $y=2.5\ \sin\ \left(2\pi t+x\right)$  

Given that a progressive wave is represented by this equation where y and x is in m and t is in s, which of the following is correct?

• wave travels to the right, wavelength is  $2\pi\ m$  

• wave travels to the left, wavelength is  $2\pi\ m$  

• wave travels to the right, wavelength is 1 m

• wave travels to the left, wavelength is 1m

 $y=5\ \sin\ \left(\pi t-10x\right)$  
Given that a progressive wave is represented by this equation where y and x is in cm and t is in s. Determine it's amplitude, frequency and wavelength.

•  $5\ cm\ ;\ f=0.5\ Hz\ ;\ 0.2\pi\ cm$  

•  $5\ cm\ ;\ f=0.2\ Hz\ ;\ 0.2\pi\ cm$  

•  $5\ cm\ ;\ f=0.5\ Hz\ ;\ 0.5\pi\ cm$  

•  $5\ cm\ ;\ f=0.2\ Hz\ ;\ 0.5\pi\ cm$