Monday, March 11, 2013

WHAT IS DEMOCRACY?
There seems to be a great confusion what the word Democracy means. In spite of the fact that at least in some parts of the world one can hear it from the media every day.
Democracy by definition means the government by people. That means that all the people should be able to have their say in one way another in everything that affects their lives. Dictionaries usually say that this right can either be exercised directly or through representatives. This second arrangement is then called Representative Democracy.
Representative democracy would be fine if the representatives would really make all their decisions only after consulting their constituencies. In the least, after having a clear idea about the views of their constituents on a particular issue, and trying to accommodate these views as best as possible.
Unfortunately, a vast majority of countries that call themselves Representative Democracies are not true democracies according to the above definition. Most of them are actually just Elected Dictatorships. People can vote usually only once every four or five years. They do not vote on any issues. They just elect their so called representatives who then until the next elections have no obligations by law and little incentives to base their decisions on individual issues on the wishes on their electorate. They hardly ever bother to consult them on their stands on various issues. Therefore, legislative bodies composed of such "representatives" act in a very dictatorial manner between the elections. The only country that is quite close to the definition of Democracy is Switzerland.
Any governmental system is fine if the people subject to this system are happy with it. Perhaps, in most of the above described "Elected Dictatorships," such a system of government is still the best one under the current circumstances.
What do you think? Are you happy with this? Isn't it time to do better? It all should depend on you, the citizens, which system you prefer. Are you willing to give some of your free time to be interested in public matters, and to participate in decision making?
We would like to hear from the politicians of the so called "Representative Democracies" how in their view their activities satisfy the definition of Democracy.
We would like to discuss the interesting question of the Leadership. What is the role of leaders in a true Democracy?
We would like to contribute to the clarification of the meaning of the word Democracy.
You are invited to participate.

Thank You.





























































liquid 

Physical properties of liquids

  • Liquids may be divided into two general categories: pure liquids and liquid mixtures. On Earth, water is the most abundant liquid, although much of the water with which organisms come into contact is not in pure form but is a mixture in which various substances are dissolved. Such mixtures include those fluids essential to life—blood, for example—beverages, and seawater.
    The most obvious physical properties of a liquid are its retention of volume and its conformation to the shape of its container. When a liquid substance is poured into a vessel, it takes the shape of the vessel, and, as long as the substance stays in the liquid state, it will remain inside the vessel. Furthermore, when a liquid is poured from one vessel to another, it retains its volume (as long as there is no vaporization or change in temperature) but not its shape. These properties serve as convenient criteria for distinguishing the liquid
    Water+alcohol

Wednesday, March 6, 2013



Mixtures In Liquids

When two liquids totally mix they are said to be miscible.
An example of this would be alcohol and water.

When to liquids do not mix they are said to be immiscible.
An example would be oil and water:
When cooking oil is shaken in water it turns it milky. This mixture is called emulsion.



What is the difference between miscible and immiscible liquid? Can we call water and alcohol a miscible liquid?

Monday, March 4, 2013

Dear Friends,
Can you please suggest me some of the best ways of teaching this concepts to the students? I would appreciate if you could suggest me with some appropriate strategies and teaching learning materials that I can use while delivering this concepts to my students.
Thank You.

Mixtures: solutions and suspensions.

Not all things are pure substances. Some are mixtures i.e. contains more than one substance.
E.g.                             A mixture of water and carbon dioxide           (liquid + gas)
  
Solutions

When the 2 substances totally mix it is called a solution.

E.g. Solute + Solvent = Solution
         (sugar) + (water) = Solution

We then say sugar is soluble in water, it has dissolved.

Suspensions

Sometimes when we mix substances they stay in clusters. We therefore say it is insoluble in water.

E.g. Chalk + Water = Suspension

Eventually the particles sink to the bottom to form sediment.