Rock, soil, etc.
Rock.
The Earth itself is.
The frequency of a sound wave does not affect the speed at which the wave moves. The speed of sound in a medium is determined by the properties of that medium, such as its density and elasticity. However, frequency does impact the pitch of the sound we hear.
The disturbance that travels through a medium as a compressional wave is called a longitudinal wave. In this type of wave, the particles of the medium move parallel to the direction of the wave's energy propagation. Sound waves are a common example of longitudinal waves.
An example of a transverse wave is a wave on a string when it is plucked or shaken. In this type of wave, the particles of the medium move perpendicular (sideways) to the direction of the wave propagation. This causes crests and troughs to form as the wave travels along the medium.
Factors that affect the propagation of a wave along a medium include the density and elasticity of the medium, the wavelength of the wave, and the tension in the medium. Additionally, the temperature and pressure of the medium can also influence wave propagation.
Rock.
In activity 1 part c, the medium of wave propagation is air.
The Earth itself is.
A disturbance that travels through a medium as a longitudinal wave is known as a sound wave. In a longitudinal wave, the particles of the medium oscillate parallel to the direction of wave propagation. Sound waves are an example of longitudinal waves as they require a medium, such as air or water, to travel through.
Perpendicular to the direction of wave propagation.
That would be a longitudinal wave. In a longitudinal wave, the particles of the medium move parallel to the direction of the wave propagation, causing compression and rarefaction as the wave travels through the medium.
Mechanical waves
A Sound wave, water wave, earth quake wave. Electromagnetic waves (radio, light, etc.) do not require a medium for propagation.
Rock, soil, etc.
When a medium is disturbed by a wave, the particles of the medium begin to oscillate back and forth in the direction of the wave's propagation. This transfer of energy results in the wave moving through the medium.
A longitudinal wave is a wave where the particles of the medium move parallel to the direction of the wave propagation, like compressions and rarefactions in a spring. A transverse wave is a wave where the particles of the medium move perpendicularly to the direction of wave propagation, like the motion of a string being plucked.