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Meghna Thapar 5 years, 9 months ago
People are considered as resources because they have skills, mind and knowledge to do various things. They invent different things and through this there is a progress and we become technologically advanced.
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Meghna Thapar 5 years, 9 months ago
Topography refers to how physical features of a places such as mountains, hills,valleys and plains are distributed in a certain place. These affects how population of a place will be distributed. For example many people don't like settling in mountains place since there difficulties go up there and usually no roads. Most of the people settle in plain areas where by accessing their places will not a issue. Relief affects a topography of place this will lead to poor distribution of population in some areas.
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Adolescence is that period of life when many changes start taking place in the body; which results in reproductive maturity. It usually begins at around age of 10 years and is seen till 18 or 19 years of age. Adolescents are also called as teenagers as teen age period is also covered up in adolescence.
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Darth Vader ☠️☠️??☠️☠️?? 5 years, 10 months ago
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Yogita Ingle 5 years, 9 months ago
Mahatma Gandhi felt that colonial education had enslaved Indians and created a sense of inferiority in the minds of Indians. It made them see Western civilisation as superior, and destroyed the pride they had in their own culture. Indians educated in these institutions welcomed everything that came from the West, and started admiring British rule. Gandhiji felt that English education made Indians strangers in their own lands.
Posted by Vaibhavi Kunjir 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
Chlorofluoro carbons (CFCs) are used in refrigerators, air conditioners and aerosol sprays. CFCs damage the ozone layer of the atmosphere which protects us from harmful ultraviolet rays of the sun.
Effects of ozone depletion:
(i) Skin cancer.
(ii) Damage of eyes.
(iii) Damage of immune system.
(iv) Decreased crop yields.
Posted by Vaibhavi Kunjir 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
- Increasing and Reducing Friction:
Friction can be increased by the following methods:
- Grooves are made in the soles of shoes to increase friction and prevent slipping.
- Treads are made in the tyres of vehicles to increase friction and prevent skidding of vehicles on wet roads.
- Spikes are provided in the shoes of players and athletes to increase friction and prevent slipping.
- Gymnasts apply some coarse substance on their hands to increase friction for better grip.
- Machine belts are made of special materials to increase friction and drive machine wheels properly.
Methods of reducing friction:
- Friction can be reduced by making the surfaces smooth by polishing.
- Friction can be reduced by applying lubricants like oil or grease to the rubbing surfaces.
- Friction can be reduced by using wheels to move objects.
- Friction can be reduced by using by using ball bearings between the moving parts of machines.
Posted by Vaibhavi Kunjir 5 years, 10 months ago
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Meghna Thapar 5 years, 10 months ago
A cloud is a visible mass of condensed water vapours floating in the atmosphere, high above the ground. A heavy, dark, rain cloud is called storm cloud. When a storm cloud develops in the sky, strong winds move upwards through the cloud and make the water drops present in the cloud to rub against one another which produces extremely large electric charges in the cloud due to friction. The small water drops acquire a positive charge and being lighter, move to the upper part of the cloud with rising wind. The larger water drops acquire negative charge, and being heavier, come down in the lower part of the cloud. When the magnitude of the accumulated charges becomes very large, the air which is a poor conductor of electricity, is no longer able to resist their flow. Negative and positive charges meet, producing streaks of bright light and sound. We see streaks as lightning. The process is called an electric discharge.Lightning usually occurs within a cloud in the sky called as ‘sheet lightning’. If lightning occurs between a cloud and the earth or tall objects of the earth, it is then called ‘fork lightning’.
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Aryamann Kaul Kaul 5 years, 10 months ago
1Thank You