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 Re: اسرار الرقم 7 (Re: Hassan Makkawi)
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[edit] In science
Roy G. Biv = red, orange, yellow, green, blue, indigo, and violet were originally named as the seven colors of the rainbow, though blue and indigo are considered by some to be the same color.
The number of spots on a common ladybug.
The seven days of the week.
Seven is the number of holes in the ######### of most mammals.
[edit] Biology
With very few exceptions, all mammals' necks have seven bones.
There are seven types of virus according to the Baltimore classification.
[edit] Chemistry
A neutral pH value between acidity and alkalinity.
The atomic number of nitrogen.
The number of carbon atoms in heptane, a hydrocarbon.
The number of periods, or horizontal rows of elements, on the periodic table.
[edit] Astronomy
The number of stellar objects in the solar system visible to the naked eye — the Sun, the Moon and the five classical naked eye planets: Mars, Mercury, Jupiter, Venus, and Saturn.
Messier object M7, a magnitude 3.5 open cluster in the constellation Scorpius.
The New General Catalogue object NGC 7, a 14th magnitude spiral galaxy in the constellation Sculptor.
The number of daughters of Atlas in the Pleiades (also called the "seven sisters").
The number of saints appearing in a constellation called "Saptharishi Mandalam" in Indian astronomy.
The number of stars in the constellation of The Big Dipper.
The Saros number of the solar eclipse series which began on -2590 April 8 and ended on -1310 May 16. The duration of Saros series 7 was 1,280.1 years, and it contained 72 solar eclipses.
The Saros number of the lunar eclipse series which began on -2595 July 15 and ended on -1008 February 22. The duration of Saros series 7 was 1,586.6 years, and it contained 89 lunar eclipses.
The Roman numeral VII stands for white dwarfs in the Yerkes spectral classification scheme.
The Roman numeral VII (usually) stands for the seventh-discovered satellite of a planet or minor planet (e.g., Jupiter VII).
[edit] In technology
The code for international direct dial phone calls to Russia and Kazakhstan.
There are seven classes of plastics used in packaging applications.
The resin identification code used in recycling to identify "other" plastics such as polycarbonate
The number of digits in an American or Canadian telephone number, excluding the area code.
In Microsoft's Rich Text Format specification, seven and all numbers congruent to it modulo 256 refer to variants of the German language.
Windows 7, the upcoming Microsoft operating system sometimes referred to as just "7".
In the ASCII character set, the bell character.
There are Seven Tools of Quality.
There are seven layers in the OSI model.
There are seven logic gates. NOT, AND, OR, NAND, XOR, NOR, XNOR
The seven-segment display, is an electronic device that uses seven individual segments to create one digit; it is used in display devices like digital clocks and some basic calculator screens, amongst others.
For more, visit the source:
http://en.wikipedia.org/wiki/7_(number)
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Hassan Makkawi
Kostawi
فيس بوك
تويتر
انستقرام
يوتيوب
بنتيريست