The Revolutionary principles incorporated by Napoleon in administration of France during his reign where first he did away with privileges of birth second equality before law third right to property for simplified administrative divisions abolished Federal systems 63 pigeons from ceftum and manorial dues 7th uniform and standard weights and measures at uniform trade rules.

The property of light travelling in a straight line is called rectilinear propagation.

Two natural phenomena based on the property that light travels in straight lines are as follows:

•  Lunar Eclipse: This phenomenon occurs when the Earth, the Sun and the Moon are aligned in such a way that the Earth comes between the Sun and the Moon. Light from the Sun cannot reach the Moon and is covered by Earth's shadow.
•  Solar Eclipse: This natural phenomenon takes place when the Moon comes in between the Sun and the Earth, blocks the sun rays from reaching the Earth and, covers the Earth with its shadow.

Potential resources-the resources which are not yet being used or which are still in preliminary stage are potential resources. Devoloped resources- the resources which have been developed by man for use and which are being utilized are actual resources. Potential resources are those that have been identified at particular places but have not yet been utilised whereas developed resources are those that have been surveyed and identified for their quality and quantity.

Prudence is care, caution, and good judgment, as well as wisdom in looking ahead: sober prudence in handling one's affairs. Foresight implies a prudent looking ahead rather far into the future: clear foresight in planning. Prudence is defined as the act of being careful, often with money. An example of prudence is checking your bank account before you spend money.

Carbohydrates are macronutrients and are one of the three main ways by which our body obtains its energy. They are called carbohydrates as they comprise of carbon, hydrogen, and oxygen at their chemical level. Carbohydrates are essential nutrients which include sugars, fibers, and starches. They are found in grains, vegetables, fruits, and in milk and other dairy products. They are the basic food groups which play an important role in a healthy life.

Aluminium and zinc react with moist air to form a thin protective layer of oxide on their surfaces. This Iayer prevents further corrosion of the metals. Aluminum unlike iron and steel,does not rust or corrode in moist conditions. Its surface is protected by a natural layer of aluminium oxide. This prevents the metal below from coming into contact with air and oxygen.

Lencho was a hard working farmer. He had grown corn in his field and was waiting for rain anxiously. He was very happy to see the rain but it later turned to worry as the rain became a storm and destroyed his fields. He had deep faith in God and after the destruction of the field, he was hopeful that everything will be all right. Although clencho was a very strong man and worked hard in the field, his faith in God made him write a letter to God. He asked for hundred pesos from God and was confident of receiving the amount. When he received only seventy pesos he again wrote to God asking for the remaining money and accusing the postal department for stealing money. This shows that Lencho was a religious man.

A coalition government is one which is formed by the coming together of at least two political parties. Usually, it is the partners in an electoral coalition that form a political alliance and adopt a common political programme.

• The purpose of the public sector is not just to earn profits but to think about the social benifits also.
• There are several things needed by the society as a whole but which the private sector will not be able to provide at a reasonable cost.
• Some of these require large sums of money to be spent, which is beyond the capacity of the private sector.

The tertiary sector is different from the other two sectors because the other sectors produce goods but this sector does not produce goods by itself. Instead, the tertiary sector activities help in the development of the primary and secondary sectors. These activities are an aid or support for the production process, e.g., transport, communication, storage, banking, insurance, trade activities etc. For this reason this sector is also known as service sector.

The 1848 revolution of the liberals refers to the various national movements pioneered by educated middle classes alongside the revolts of the poor, unemployed and starving peasants and workers in Europe. While in countries like France, food shortages and widespread unemployment during 1848 led to popular uprisings, in other parts of Europe (such as Germany, Italy, Poland, and the Austro-Hungarian Empire), men and women of the liberal middle classes came together to voice their demands for the creation of nation-states based on parliamentary principles. The political, social and economic ideas supported by the liberals were:

•  Politically, they demanded constitutionalism with national unification, nation-state with a written constitution and parliamentary administration.
•  Socially, they wanted to rid society of its class-based partialities and birthrights. Serfdom and bonded labor had to be abolished.
•  Economically they demanded freedom of markets and right to property. The abolition of state-imposed restrictions on the movements of goods and capital.

Chalk is nothing but calcium carbonate.

Its chemical formula is CaCO₃.