1.It completely dodged any decimalization of time( except fractions of a second). [Though decimalization of time had been and continues to be discussed ad nauseum.] The second is now so embedded into the metric system that we would have to scrap it entirely if we changed to any other measure of time. 2. It completely dodged any change at all to angles including decimalization. It no longer defines an angle unit at all, and considers radians to be a derived unit of metres/metre. And degrees are often used anyway, because having an angular measure in radians is ... well ... irrational! 3. It works terrifically well with decimal arithmetic, and horribly with fractions (except for fractions like 1/2, 1/5, 1/10 - that is, factors of 10). Dividing anything into thirds (or any fraction including a factor of 3) is not exactly possible. 4.It still has weird units (some of which are officially “non-SI” metric units) a. The primary unit of weight is the kilogram. That is, the gram isn’t defined, the kilogram is. The gram is derived as 1/1000 kilogram, which CERTAINLY isn’t the basic metric philosophy to pick consistent base units and then apply prefixes. Here the base unit has a prefix, and the un-prefixed unit is derived. b. Although there are prefixes for 10, 100, 1/10, 1/100 (even for 10,000, etc.), they are mostly not used, in favor of only multiples of 1000. (Centimeters is a notable exception.)
c. When measuring really small things, half the time nanometers are used, and half the time Ångstroms are used, which are “deci-nanometers”.
d. Micrometers are called microns. e. 1 J = 1 W * s. But electrical usage is measured in kW-hr, which are 3.6 MJ. In chemical bond energy, kilocalorie is used (“small calorie”). In food packaging, Calories are used (“large calorie”), where 1 Calorie = 1 kilocalorie. (note big C and little c.) 1 cal ~= 4.2 J; 1 Cal. ~= 4.2 kJ. (approximate, due to the particulars of the various definitions of calorie.) I conclude, a joule is a lousy unit of energy to have picked. f. While many things have been corrected, luminance is still pretty screwed up. First, you have watts, candelas, lumens, lux, each meaning brightness, but in a little different sense. But the primary metric unit is candela. However, candela is just the same “candle” power in use before the metric system – literally the light of one (“standard”) candle. But, like the second, it’s been scientifically respecified: even though candles shine infinitely many different frequencies, a candela is the luminous intensity, in a given direction, of a particular pure green light (which humans are most sensitive to) with a radiant intensity (in that direction) of 683 Watts per steradian. Why not of 1 W, or 1 kW? Because it’s about the same as the previous candle (candlepower, foot-candle). Any other color of light, or blend of colors, has to be adjusted by an assumed “standard human eye” sensitivity curve. (And, historically, the candela was originally specified by the glow of freezing platinum equated to 60 candles. That should make you feel warm.)
North Africa is diverse. It is a myth that all North Africans have the typical Mediterranean look. It is the people you mostly see on TV and in movies.
Many North Africans can only be classified as North African Blacks. You rarely see them on TV or in the movies. They mainly live in the southern regions or as isolated communities, even in the north or the center of North African countries.
Genetically, the e1b1b haplogroup is shared by people in North Africa, in the Sahara and in Africa south of the Sahara. The palest Kabyles, the darkest Somali, the blackest Maasai and the “yellowish” San further south in Southern Africa carry the e1b1b hg.
The Sahara desert does not divide Africa genetically or phenotypically.
The differences between North Africa and Africa south of the Sahara are related to history and culture.
The history of North Africa is intertwined inseparably with European history (Roman Empire, the Greek Empire etc.), Persian history, Arab history and the history of the Ottoman Empire.
North Africa belongs to the Mediterranean world, northern coastal regions particularly (the food is typically Mediterrenean food). North Africa belongs to the Arab World. Arab culture is very strong and dominant. There is also a major influence of the Turkish culture.
The distance between the east coast and west coast of Australia is 2,500 mi.
Australia is an island country that is also a continent on its own, and that makes it unique. It is one of the biggest countries in the world, and no wonder that it is a very long and wide country.
In a straight line, Australia's east coast is 2,500 mi away from the west coast of the country.
The biggest and most influential city in the east coast is Brisbane, while on the west coast it is Perth that has that role.
Algae bloom is a rapid accumulation proteins and amino acids that creates the generation of algae in freshwater or marine water ecosystem as a result the discoloration of the water takes place. The blooming can influence animals and sea creatures in harmful ways as they tend to block the sunlight and deplete the oxygen levels and excessive blooming can be seen as an example of Red tides caused by pigmented algae.
