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Posted by Seema Meher 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
Lightning is observed as a bright streak of light during a thunderstorm. Lightning is always accompanied by the sound of thunder. The transfer of charge from clouds to the earth or from cloud to cloud is called lightning. In simple words; lightning is an electric spark which happens on a grand scale in the sky.
Mechanism of Lightning
- During a thunderstorm, the air currents move upward and water droplets move downward. These movements take at very fast pace and it results in separation of charges in the clouds.
- The positive charges accumulate at the upper edges of the clouds and the negative charges accumulate at the lower edges of the clouds. Scientists are yet to understand the exact reason for this.
- At the same time, the ground becomes positively charged.
Posted by Gulzar Hussain3487 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
a. Mere presence of resources are not enough, the process of transforming the resources which are naturally available to satisfy human needs involves an interaction between a number of factors most important being the technology and institutions and how human beings transform them.
b. Human beings make machinery, devices by using natural resources, and transform them in something more valuable. In this entire process, they use their expertise, knowledge, skills
c. Human beings transforms natural resources in their original form into a more valuable form.
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Meghna Thapar 5 years, 9 months ago
The Nationalist Movements in India were organized as mass movements emphasizing and raising questions concerning the interests of the people of India. In most of these movements, people were themselves encouraged to take action. Due to several factors , these movements failed to win independence for India. However, they did promote a sense of nationalism among the people of the country. The failure of these movements affected many people as they withdrew from Government offices, schools, factories and services. Though they did manage to get a few concessions such as those won by the Salt March in 1930, they did not help India much from the point of view of their objective.
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Yogita Ingle 5 years, 10 months ago
Some of the physical properties of metals are listed below.
- Shiny (lustrous) in nature
- Metal is a good conductor of electricity and heat
- Density and melting point is high
- Mouldable (Malleable)
- Ductile
- At room temperature, it is in solid form except for mercury
- Opaque
Some of the physical properties of non-metals are listed below.
- Poor conductors of electricity and heat
- Non-Ductile metals
- Brittle solids
- Maybe solids, liquids or gases at room temperature
- These are not sonorous
- Transparent
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Yogita Ingle 5 years, 10 months ago
In 1813, about 400 years after Fontana built his wheeled contraption, a German aristocrat and inventor named Karl von Drais began work on his own version of a Laufmaschine (running machine), a four-wheeled, human-powered vehicle. Then in 1817, Drais debuted a two-wheeled vehicle, known by many names throughout Europe, including Draisienne, dandy horse and hobby horse.
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Yogita Ingle 5 years, 10 months ago
The term polymer id derived from two greek words POLY meaning many and MER meaning units. Therefore polymer refers to combination of repeating units. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. Other examples of natural polymers includes silk, wool, cellulose, DNA and proteins. Some of the synthetic polymers are nylon, Teflon polyester, polyethylene etc..
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Meghna Thapar 5 years, 9 months ago
Reservation Policy in India is a process of reserving certain percentage of seats (maximum 50%) for a certain class such as Scheduled Castes, Scheduled Tribes, Backward classes, etc. in Government educational institutions, government jobs, etc. The reservation policy is an age old policy being practiced in India.
Posted by Paulin Shruthi 5 years, 10 months ago
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Meghna Thapar 5 years, 9 months ago
The dignity of the individual, the equality of society, protection of larger public interest and safeguard of national unity are ensured by the provisions of fundamental rights. Since the rights are guaranteed and protected by the constitution, the supreme law of the country, they are called as fundamental rights.
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Kaustubh Mani 5 years, 10 months ago
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