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Ask QuestionPosted by Aarohi Kushwaha 6 years, 3 months ago
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Pavni Wadhwa 6 years, 3 months ago
Jatin Jatin 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Adolescence: Adolescence is the period of life when many changes take place in the body; leading to reproductive maturity. Adolescence begins at around 10 years of age and lasts till 18 or 19 years of age.
Renuka Seiwal 6 years, 3 months ago
Posted by Jay Bharat 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
Curved Surface Area- The curved surface area is defined as the area of only curved surface, leaving the circular top and base.
Consider a cylinder having a height ‘h’ and base radius ‘r’.
The curved surface area of a cylinder is given as-
C.S.A.= 2 πrh
Posted by Aniket Mishra 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
Bacterial, viral and parasitic diseases like typhoid, cholera, encephalitis, poliomyelitis, hepatitis, skin infection and gastrointestinal are spreading through polluted water.
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Meghna Thapar 5 years, 9 months ago
Kerosene is less volatile than gasoline. Its flash point (the temperature at which it will generate a flammable vapour near its surface) is 38 °C (100 °F) or higher, whereas that of gasoline is as low as −40 °C (−40 °F). This property makes kerosene a relatively safe fuel to store and handle. Kerosene will burn, compared to some amount of explosion from the mixed gasoline vapors since it evaporates much faster than kerosene.
Posted by Itishree Prusty 6 years, 3 months ago
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Meghna Thapar 5 years, 8 months ago
IT plays an important role in various sectors and industries. ... In an industry that automates things for the benefit of humankind, IT helps to make the manufacturing process less cumbersome and more automated. Information technology plays the mainrole in students being able to keep their jobs and go to school. With the introduction of computers, the business world was changed and by using computers and software, businesses use information technology to ensure that their departments run smoothly. Information technology (IT) is the use of any computers, storage, networking and other physical devices, infrastructure and processes to create, process, store, secure and exchange all forms of electronic data.
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Meghna Thapar 6 years, 1 month ago
Those organisms which are too small to be seen without a microscope are called microorganisms. Microorganisms are present in soil, water and air around us. They are classified into four major groups – bacteria, fungi, algae and protozoa.
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Netra ? 6 years, 3 months ago
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Khushi Arora 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
If all organisms stop the process of reproduction the there will be no organism left and it will lead to extinction.
Posted by Deepak Singla 6 years, 3 months ago
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Posted by Prathiphaa Vijayaraj 6 years, 3 months ago
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Tanveer Singh 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Weavers often belonged to communities that specialised in weaving. Their skills were passed on from one generation to the next.
The communities famous for weaving includes:
(i) The Tanti weavers of Bengal.
(ii) The Julahas or Momin weavers of north India.
(iii) Sale and Kaikollar and Devangs of South India.
Posted by Kanchan Bala 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
- The Solar System comprises the sun, the planets, asteroids, meteors and other celestial bodies.
- There is a gravitational attraction between the sun and the celestial objects that keep them revolving around the sun.
- The sun acts as the main source of heat and light energy for all the planets in the solar system
Posted by Isha Khera 6 years, 3 months ago
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Hitarth Takkar 6 years, 3 months ago
Posted by Varun Wadhwani 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
- We should use CNG; instead of petrol and diesel in automobiles.
- We should use public transport instead of cars and bikes.
- We should use bicycle as often as possible.
- We should walk for short distance commute.
- Data on air quality can be utilized to assess the situation and to take timely action.
- More efforts should be made to develop alternate sources of energy, e.g. solar energy, biofuel, etc.
- We should plant more trees in our surroundings because trees maintain the balance between carbon dioxide and oxygen in atmosphere.
- Burning of dry leaves should be stopped. Dry leaves should be utilized to make compost.
Posted by Varun Wadhwani 6 years, 3 months ago
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Posted by Samarth Gayakwad20 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
Sound produced by any means has the following characteristics, namely, loudness, pitch or shrillness, and quality or timbre.
Loudness: The loudness of sound depends on its amplitude. The loudness of sound is proportional to the square of the amplitude. A roar of a lion is louder than a woman’s voice. The loudness of sound is measured in Decibel (db). If loudness exceeds 80 db, then the sound becomes physically painful.
Pitch: The pitch of sound depends on its frequency. If frequency is more, then the pitch or shrillness is more. The pitch of a woman’s voice is more and it is shriller then a man’s voice.
Audible sound: Not all sound produced by vibrating bodies is audible. The human ear can recognise the sounds of frequencies in the range of 20 Hz to 20,000 Hz. This range of frequency of sound is called audible sound.
Some animals like dogs and snakes can hear sounds of frequencies greater than 20,000 Hz.
Infrasonic sounds: Sounds of frequencies less than 20 Hz are called infrasonic sounds.
Ultrasonic sounds: The sounds of frequencies greater than 20,000 Hz are called ultrasonic sounds.
Posted by Samarth Gayakwad20 6 years, 3 months ago
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Meghna Thapar 6 years, 2 months ago
A sharp knife has a very thin edge of its blade. It cuts objects like vegetables better because due to its very thin edge, the force of our hand falls over a small area of the object producing a large pressure and thus cuts the objects easily.
Posted by Jas Singh 6 years, 3 months ago
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Prachi Sethi 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
1532 - 1472
= (153 + 147) (153 - 147)
= (300) (6)
= 1800
Posted by Samarth Gayakwad20 6 years, 3 months ago
- 1 answers
Yogita Ingle 6 years, 3 months ago
Harmful effects of noise pollution:
(i) It causes deafness.
(ii) It causes mental illness.
(iii) It causes headache and high blood pressure.
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Harsh Mishra 6 years, 3 months ago
A biosphere reserve is an ecosystem with plants and animals of unusual scientific and natural interest. It is a label given by UNESCO to help protect the sites. The plan is to promote management, research and education in ecosystem conservation. This includes the 'sustainable use of natural resources'.
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