How does a matchstick light up by using a magnifying glass ?

Light emitted by the sun is made up of photons, tiny packets of electromagnetic energy. Photons behave both as particles and waves. This quality is important because the nature of photons means that they are refracted when they pass through different media. The lens of a magnifying glass is curved to refract light particles in such a way that the eye perceives a larger image. A magnifying glass causes rays of light to change angle as they pass through the lens and meet at a specific point, focusing the energy of the photons. A combustible material, when exposed to heat and a source of oxygen, produces fire. Holding a magnifying glass so that the rays of light passing through the lens meet on a dry, flammable item, such as a piece of paper, concentrates the energy of the photons in a single spot and produces greater heat than the heat we feel on our skin from the sun. http://www.ehow.com/about_5256784_magnifying-glass-make-fire.html

PHYSICS GRADED ASSIGNMENT (REGISTER NO. 3)

Q1) How many images would you get for an object that is placed between two mirrors placed at an angle less than 90 degrees ? Q2) How many images would you get for an object that is placed between two mirrors placed at an angle more than 90 degrees.
When you place an object between two hinged mirrors, light from the object will reflect and bounce between the mirrors before it reaches your eyes. The number of images you see depends on the angle that the mirrors form as you make the angle smaller, you will see more images.
http://www.exploratorium.edu/snacks/corner_reflector/index.html
Q3) How do mirrors produce funny images?
Virtual images are images that are formed which are formed in locations where light does not reach. We are hit by particles called photons and when reflected, the mirrors bounces baack the particles. Some surfaces absorb it when it is not smooth so the smoothness of an objects affects the different images it can produce.

http://www.coolquiz.com/trivia/explain/docs/mirrors.asp
http://www.cartoonstock.com/lowres/jwe0084l.jpg

E-LEARNING ASSIGNMENT PART 3 (REG.NO.3)

There is a difference in asymmetry between sexes. Not only between sexes, everybody differs in asymmetry and their behaviour. People also differ in the way they sovle problems and this behaviour is called their intellectual or cognitive . The brain is the centre for dealing problems, therefore there must be some way in which brains differ slightly from one person to another. Difference between the left and right hemispheres is that the left hemisphere is important for all forms of communications. The right hemisphere does not involve much in communication but it can help us to understand words to some extent. It specializes in receiving and analysing information. The temporal lobe (in the lower part of the hemisphere) analyses much of the auditory input, while the occipital and parietal lobes (in the rear and upper regions) provide information about where objects are. The frontal lobes in each hemisphere seem to be important in planning our actions.Age do not affect the asymmetry facial expression. Research has proved that culture is a determining factor to facial emotions.These cultural differences are also noticeable in computer emoticons, which are used to express a writer's emotions over mails and text messaging. The Japanese emoticons for happiness and sadness vary in terms of how the eyes are depicted, while American emoticons vary with the direction of the mouth. In the United States the emoticons : ) and : - ) denote a happy face, whereas the emoticons :( or : - ( denote a sad face. However, Japanese tend to use the symbol (^_^) to indicate a happy face, and (;_;) to indicate a sad face.People have asymmetry facial expressions. Asymmetry of facial expression is common with unilateral lesions of the facial nucleus or nerve in most species. so that means cats and dogs also have asymmetry facial expressions. The results of this study prove that the hypothesis of the left side of the face should reveal more emotional intensity because the right brain hemisphere is thought to be more dominant in emotional expression.

http://www.sfu.ca/~dkimura/articles/britan.htm

http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/101100.htm

http://www.edathlon.com/science_projects/asymmetric_facial_expressions.htm

http://www.alma.edu/departments/psychology/ST96COG/Facialasymmetry/Face.html

http://www.sciencedaily.com/releases/2007/04/070404162321.htm

E-LEARNING ASSIGNMENT PART 2. (REG,NO.3)

What would happen if the freezing point of water became 10 degrees C?

In a container of ice in it. The ice are at 0°C, which is the melting point of ice and the freezing point of water.
Molecules of ice are constantly escaping into the water (melting), and molecules of water are being captured on the surface of the ice (freezing).
When the rate of freezing is the same as the rate of melting, the amount of ice and the amount of water won't change. The ice and water are said to be in dynamic equilibrium with each other. The ice is melting, and the water is freezing, but both are occurring at the same rate, so there is no net change in either quantity.
This balance will be maintained as long as the water stays at 0°C, or unless something happens to favour one of the processes over the other.  
This time we warm the ice to 10°C.
Now the water molecules are moving more quickly, because they contain much more heat. These faster-moving molecules can't easily be captured by the surface of the ice, so not very many of them freeze. Freezing occurs at a slower rate than melting
Because there are fewer water molecules being captured by the ice (being frozen) than there are ice molecules turning to water, the net result is that the amount of water increases, and the amount of ice decreases.
Since more melting is happening than freezing, the ice eventually all turns to water. 
The countries near the north pole and south pole will most likely freeze up. As the countries are very far away from the equator.

E- LEARNING ASSIGNMENT PART 1. (the invention of computers)

There are many inventors of the computer. The similar ideas of scientist and engineers led to the invention of the computer. The countries that were involved are Germany, USA and Great Britain. The ideas were carried out during the 1930s – 1940s

In Germany, Konrad Zuse hit upon the idea of building a program-controlled calculating machine when he had to deal with extensive calculations in statics. In 1935, he started to design a program-controlled calculating machine in his parents’ home. It was based on the binary system and used punched tape for the program input. The Z1 was the first such machine to be built between 1936 and 1938 but it was not fully operational. In 1940, he decided to build a successor of Z l and completed the machine that was the first freely programmable program-controlled automatic calculator that was operational in the world.

Similarly, several developments were going on in the USA at the same time. In 1939, IBM started to build a program-controlled relay calculator on the basis of a concept that Howard H. Aiken had put forward in 1937.

However, it was not Aiken's and Stibitz's relay calculators that were decisive for the development of the universal computer but the ENIAC. Extensive ballistic computations were carried out there for the U.S. Army during World War II with the aid of a copy of the analog Differential Analyzer, which had been designed by Vannevar Bush.

Mauchly had adopted John Vincent Atanasoff's idea for an electronic computer. Atanasoff had developed the ABC special-purpose computer at the Iowa State College to solve systems of linear equations. Mauchly had viewed the ABC in June 1940. John Presper Eckert, a young electronic engineer at the Moore School, was responsible for the brilliant engineering of the new ENIAC. The work began on 31 May 1943 with funding from the U.S. Army. In February 1946, successful program runs were demonstrated.

John von Neumann, an influential mathematician, turned his attention to the ENIAC in the summer of 1944. While this computer was being built, von Neumann and the ENIAC team drew up a plan for a successor to the ENIAC. The biggest problem with the ENIAC was that its memory was too small. Eckert suggested a mercury delay-line memory which would increase memory capacity by a factor of 100 compared with the electronic memory used in the ENIAC.

 In meetings with von Neumann, the idea of a stored-program, universal machine evolved. Memory was to be used to store the program in addition to data. This would enable the machine to execute conditional branches and change the flow of the program. The concept of a computer in the modern sense of the word was born.

In spring 1944, von Neumann wrote his "First Draft of a Report on the EDVAC" (Electronic Discrete Variable Computer) which described the stored-program, universal computer. This EDVAC report was originally intended for internal use only but it became the "bible" for computer pioneers throughout the world in the 1940s and 1950s.

The first two computers featuring the von Neumann architecture were not built in America but in Great Britain. On 21 June 1948, Frederic C. Williams of the University of Manchester managed to run the prototype of the Manchester Mark I, and thus proved it was possible to build a stored-program, universal computer. The first really functional von Neumann computer was built by Maurice Wilkes at Cambridge University. This machine called EDSAC first ran a program on 6 May 1949 computing a table of square numbers.
 

Without computers, many works have to be done by hand and it would take a very long time to do calculations and research without the computers.  The most fascinating aspect  of a computer is how the programmes work  in a computer  and  how it work in doing calculations  efficiently. It will help to save time and lessen people's work burden. It is truly commendable that such ideas were thought of .