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The "trough".
Sound moves by vibration. It is conducted by the vibration of matter. That vibration oscillates up and down in crests and troughs (hi's and low's). The distance or "wave length" between one crest and the next is a sound wave.
Carbon MONOXIDE is lighter than air, and will rise. Place the detector high. Carbon DIOXIDE is heavier than air, and will sink. Place detector low.
No. The crest is the height of the wave. The period is the time it takes for 2 waves to pass one point. ---Only one wave, but two crests, the high and the low one. The number of waves per second is the frequency. Sage.
how are low pressure mercury lights made and how do they operate?
The "trough".
The area between bulges of water is a depression or a low-tide area. High tidal bulges have these low-tide areas which would correspond to troughs.
It is a valley.
Sound waves are like ocean waves because it resembles an ocean wave with crests (peak) and troughs (valleys). The crests indicate regions of high pressure and the troughs, low pressure.
A dale is a low place between hills; a valley.
A dale is a low place between hills; a valley.
Sound moves by vibration. It is conducted by the vibration of matter. That vibration oscillates up and down in crests and troughs (hi's and low's). The distance or "wave length" between one crest and the next is a sound wave.
the distance between a high and low place on a map
Valley or vale.
The highest parts of a transverse wave are CRESTS.
It can be "the pass" (as a low place between two mountains), or "the step."
the low area between hills or mountain is called...VALLEY