Pyramids

Contributed by Affan Faisal, Canada

The Egyptian pyramids are ancient pyramid shaped masonry structures located in Egypt. There are 138 pyramids discovered in Egypt. Pyramids were made by sand, rocks and they needed sun to grow because by the sun the sand gets harder. The famous pyramid was found in Giza. 

The earliest known Egyptian pyramids are found at Saqqara northwest of Memphis. The estimate of the number of workers it took to build the pyramids have a wide range from a few thousand, twenty thousand, and up to 100,000 and these pyramids are generally considered to be the world's oldest monumental structures constructed of dressed masonry.

Quick Tip for Remembering Sign of Derivatives of Trigonometric Functions

Derivative of sin(x) is cos(x) but derivative of cos(x) is –sin(x). For all those who find it a little hard to remember which trigonometric function’s derivative is negative and vice versa, here is a quick tip for free! 

All those trigonometric functions starting with letter ‘C’ have negative derivatives! However in case of hyperbolic trigonometric functions, only the reciprocal functions (sech, cosech and coth) have negative value derivatives. Check any derivatives table and see it yourself! Isn't it a handy tip?

Canada

Contributed by Affan Faisal, Canada

Provinces

Canada is a country in North America. There are ten provinces in Canada. The provinces in Canada are Alberta, Manitoba, Saskatchewan, British, Columbia, Ontario, Quebec, Ottawa, New Found land, and Labrador. 

Provinces meanings

Quebec is derived from an Algonquian word meaning ''where the rivers narrow''. Ontario means ''Beautiful water''. Manitoba's meaning is ''the space where the spirits speaks''.

Populations

The population in 2001 in Canada was 1,107,000. The population in  2002 was 31,414,000.

Plum Tree

Contributed by Affan Faisal, Canada


Plums are a very attractive crop that needs a little pruning and can reach up to 4or 5 meters high. In a well drained soil and with good air circulation they should produce within 3 to 5 years. Pollination of plums is complex.

Fresh plums have almost nothing in common with grocery ones, which are harvested way too long before maturity, not having built up their complex sugars. Plums have an amazingly sweet and good flavor. European plums tend to be better than the other ones in cooking. 
Plum tree flowers grow in the early spring.  At that time a plum tree will covered in blossoms. In a good year half of the flowers will be pollinated and become plums. If the weather is too dry, the plums will not develop but will fall from the tree while still tiny green buds. Plums can be red, purple, black, blue, brown and yellow.

Sources: 

http://www.hardyfruittrees.ca/plumtrees.htm

http://en.wikipedia.org/wiki/Plum