Anything that can move to and fro or back and forth is called vibration. A wiggle in time is called vibration. A wiggle in space and time is called wave. A wave is disturbance over the space.

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Sound waves are mechanical waves. In order to propagate sound waves, a medium is necessary; whereas light waves are electromagnetic waves which didn"t require any medium to propagate. Light wave can travel in vacuum also.
Vibration is a wiggle in time. A wiggle in space and time is wave. All vibrating bodies produce waves. So vibration is the source of all waves.
Period: Period of a wave is the time required for a vibration of a wave to make a complete cycle. For example, if a pendulum makes ten vibrations in one second, its period will be 1/10 second.Amplitude: Amplitude of a wave is the maximum displacement from equilibrium position. In a transverse wave amplitude refers to the distance from the midpoint to the crest ( also from the midpoint to the trough) of the wave.Wavelength: Wavelength of a wave is the distance between successive crests, troughs or identical parts of a wave. Frequency: Frequency of a wave refers to the total number of vibrations completed in unit time. For example, if a pendulum makes ten vibrations in one second the frequency of pendulum is ten hertz (cycles per second)
The number of vibrations per second is called frequency. The units for frequency are HZ. The given frequency is 101.7 MHz. It is equal to the number of vibrations per second here, one Hz represents "one vibration per second".101.7 MHz = (101.7 MHz) (10^6 hz/1 MHz)= 101700000therefore the number of vibrations per second is 101700000
No, the medium does not travel with the wave. For example, when we speak, the air layer close to our lip remains close to the lip even when sound wave reaches the eardrum of the receiver. Similarly when water wave is produces by throwing a stone in a pond end a leaf placed at some point, the leaf vibrates up and down but it does not travel with the water wave.
In what direction are the vibrations in a transverse wave, relative to the direction of wave travel?
In transverse waves, the direction of particle displacement is perpendicular to the direction wave travel. Example: propagation of light waves.
In what direction are the vibrations in a longitudinal wave, relative to the direction of wave travel?
The compression and rarefactions are produced in longitudinal wave. The compression are the region of high pressure. In compression, atoms are squeezing together. The rarefaction are region of low pressure. In a rarefaction atoms are stretching out.
Any vibrational object produces sound. We can produce sound waves in a tuning fork by setting a vibration up in a medium, such as air. In such a case, the atoms in the medium vibrate and hence produce sound waves.
Sound travel faster in warm air as faster moving molecules at higher temperature pump into each other more frequently. Thus a pulse is sent in less time in a warm air.
How does the speed of sound in water compare with the speed of sound in air? How does the speed of sound in steel compare with the speed of sound in air?
The speed of sound in water is four times of the speed of sound in air. The speed of sound in steel if fifteen times of the speed of sound in air.

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Law of reflection for sound - The law of reflection of sound states that the angle of incidence is equal to the angle of reflection.