Waves are powered by many things such as:
wind
rain
splashes
dropped items
explosions underwater create tsunamis....
etc etc
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A wave is powered by energy transferred from a source. In the case of ocean waves, the primary source of energy is the wind transferring its energy to the water's surface causing waves to form and propagate.
The S-wave, or secondary wave, always arrives after the P-wave. S-waves are slower than P-waves and are the second wave to arrive during an earthquake.
no a p wave is faster than s wave
Any wave has two directions: the up and down direction (primary wave) and the side to side direction (secondary wave).
A standing wave can tell you about the resonant frequencies of a system. It is formed when a wave reflects back on itself and interferes constructively or destructively. The nodes and antinodes of a standing wave provide information about the wavelength and frequency of the wave.
Sound wave is an example of a purely longitudinal wave. In a sound wave, the particles of the medium vibrate in the same direction as the wave is moving, creating compressions and rarefactions as the wave travels through the medium.