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Which Earth cycle are you referring to (there are many). If you want us to answer your questions you must be sure your question is as precise as possible.
it doesnt stop
Period
The full cycle, from maximum to maximum, is 11 years, so the half cycle would be about 5 1/2 years. This is a long-term average; individual cycles can be longer or shorter.
The wavelength (denoted by Greek letter Lambda) is the minimum distance between any two corresponding points on a wave that are in the same stage of the cycle. This distance is usually measured from peak to peak (crest to crest or trough to trough). Wavelength is a distance and is usually measured in meters.
No, sunspot activity increases and decreases. Scientists have observed that the level of sunspot activity follows a cycle of about 11 years (11 years from maximum to maximum and 11 years from minimum to minimum).
minimum 5 cycle/min & maximum 45 cycle/min
The last sunspot cycle may have ended in December 2008 (Cycle 23). However, due to lack of sunspot activity, scientist are unsure whether cycle 23 has ended yet, or whether cycle 24 is just starting. A rough guess would place the timing around December 2009 but as with everything, nothing is certain, certainly not the sunspot cycle. (The 11 year cycle is a mean value and cannot be taken as precise). Given the approximate 11-year cycle, and assuming that cycle 24 started in January 2009, then the PEAK of sunspot activity should occur about 5 1/2 years from then, around summer 2014. See related links for more information
Which Earth cycle are you referring to (there are many). If you want us to answer your questions you must be sure your question is as precise as possible.
ratio of maximum to minimum pressure only case of constant volume heat addition in engine cycle
The sunspot cycle is about 11 years long. This can vary somewhat; the current cycle has had an extended minimum with very few sunspots for about 3 years, and even now the sunspot numbers are very low for this point in the cycle.
Solar max (aka solar maximum) refers to period of greatest activity during the solar cycle of the Sun.
The amplitude of a sine (or cosine) curve is the difference between the maximum and minimum values of the curve, measured over a whole cycle.
of course!
A circle is complete and a cycle repeat
I will first answer this from an electrical viewpoint. The maximum positive excursion from zero would be the PEAK, or MAXIMUM portion of the cycle. From a magnetic point, it would be POSITIVE. The negative excursion of the electrical cycle (below zero) would be the MINIMUM. It would be NEGATIVE from a magnetic perspective.
Sunspots are most common during a sunspot (solar magnetic) maximum, this occurs periodically, on an 11 year cycle.