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Yogita Ingle 5 years, 3 months ago
Factual description is a piece of writing that describes a person,place thing, or an event factually.In such a description,although the emphasis is on objectivity and facts, there is a lot of scope for creativity and innovation.
Posted by Venkat Sairaghav Vasudevan 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Red Algae
The pigments phycocyanin and phycoerythrin are responsible for the characteristic red colouration of the algae. Other pigments that provide green colouration (such as chlorophyll a) are present. However, they lack chlorophyll b or beta-carotene.
Posted by Hinal ... 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
A polymer is a very big molecule formed by the combination of a large number of small molecules.
Polymers are of 2 types:
1)Natural polymers:Cotton,wool,silk.
Cotton fibre is made of a natural polymer called cellulose.
Cellulose is a polymer which is made up of a large number of small glucose molecules joined one after the other.The walls of all plants cells are made up of cellulose.
2)Synthetic polymer:Nylon,polyester,acrylic,poly ethene,polyvinylchloride,bakelite,melamine.
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Yogita Ingle 5 years, 3 months ago
Uses of metals:
- Copper and aluminium are used to make wires for carrying electric currents.
- Zinc is used for galvanising iron to protect iron from rusting.
- Silver, gold and platinum are used make jewellery.
- Iron, copper and aluminium metals are used to make utensils for cooking and for manufacturing machines parts.
- Mercury is used in thermometer.
- Lead is mainly used for making electrodes for automobile batteries and for making alloys.
Uses of non-metals:
- Hydrogen is used in manufacture of ammonia, industrial chemicals.
- Liquid nitrogen is used in refrigerant, in storing human organs at low temperature.
- Sulphur is used in manufacture of sulphuric acid, sulphur dioxide gas, sulphur drugs etc.
- Sulphur is used for vulcanisation of rubber and making gunpowder.
- Phosphorus is used in the manufacture of fertilisers.
- Silicon is used for making semiconductors foe which microchips ar
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Hinal ... 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
A spreadsheet or worksheet is a file made of rows and columns that help sort data, arrange data easily, and calculate numerical data. What makes a spreadsheet software program unique is its ability to calculate values using mathematical formulas and the data in cells.
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Gaurav Seth 5 years, 3 months ago
The poem ‘Warned’ was written by Sylvia Stults. The author is concerned about the pollution caused by humans and its adverse effects on Earth and all the living being of the Earth.
“Trees towered high above
Trunks baring professed love”
These lines describe the beauty of trees. The author means that the trees were so tall and the branches of the trees which were like huge trunks showed professed to love.
There were so many trees, as much as we couldn’t find the birds but just heard the sound of the birds chirping. Now, the trees are all polluted or cut down in the name of various uses for humans.
Posted by Hinal ... 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
(X+y)(x+y)
= x ( x + y) + y ( x + y)
= x2 + xy + xy + y2
= x2 + 2xy + y2
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Bhavya Punia 5 years, 3 months ago
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