A neap tide occurs when the Moon and the Sun are at right angles with the Earth - when the moon is at its first or third quarter. This causes a smaller tidal range than average and are known as the weakest tides. Lowest of low tides occur approximately how often? a. Once a week. b. Every 14 days. c. Once a month.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.