EOSC - Destructive Waves

Rogue waves & seiches.

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Last updated: February 10, 2023

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First submitted	February 10, 2023
Times taken	1
Average score	2.0%
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Hint	Answer
sea state	degree of turbulence
to get a big wave	fast wind
	sustained wind
	long fetch
meaning ...	uninterrupted distance for wind
as these increase ...	more energy is added
	wave height increases
classify winds with ...	beaufort scale
maximum sea state	fully developed sea
mostly determined by ...	wind speed
each has a ...	practical limit
extra energy in (wind) goes to ...	wave breaking
maximum height is ...	1/7 wavelength
or ...	steepness > 1/7
or ...	steepness > 0.14
constructive interference	waves add
crests are ...	in phase
destructive interference	waves subtract
crests are ...	out of phase
rogue waves	unusually large wave
created by ...	constructive interference
also called ...	monster wave
	freak wave
can be ...	3-4 times bigger
	very dangerous

Hint	Answer
	unpredictable
	appear and disappear quickly
mostly hazardous for ...	ships at sea
but can also ...	hit the coast
common at the ...	cape of good hope
seiche	standing wave oscillating
body of water	closed or semi-enclosed
seiche generation	seismic
	meteorological
	tsunami
properties depend on ...	basin
like ...	contour
	length
	depth
period is determined by ...	natural resonant period
or ...	0.64 L/sqrt(d)
where L is the ...	longest length
and d is the ...	average depth
longer length means ...	longer period
every system has	resonance
which is when waves ...	oscillate with greater amplitude
at a ...	given period
seiches can be dangerous because ...	winds with right period
can ...	make big waves

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