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Sakshi Gangopadhya 8 years, 4 months ago
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Amar Kumar 8 years, 4 months ago
Spontaneous combustion or ignition is a type of combustion which occurs by self-heating which rapidly accelerates to high temperatures and finally, autoignition(burning without heat from any external source )is known as spontaneous combustion. Example: Phosphorous and sulphur start burning instantaneously at room temperature.
Posted by Harjot Kaur 8 years, 4 months ago
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Amar Kumar 8 years, 4 months ago
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases like Carbon dioxide and water vapour etc.
Posted by Harjot Kaur 8 years, 4 months ago
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Sanjay Jain 8 years, 4 months ago
Greenhouse effect is the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
Amar Kumar 8 years, 4 months ago
Greenhouse effect: warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air. These gases are known as greenhouse gases .
When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.
Posted by Aditya Dadhich 8 years, 4 months ago
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Amar Kumar 8 years, 4 months ago
Liquid nitrogen is so cool because of the way molecules change as a gas turns to liquid. This compression causes the gas to heat up. While keeping the pressure high we cool it down to the temperature of the lab.
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Amar Kumar 8 years, 4 months ago
Fluid Friction: It is the resistance force of flow of liquids.
As in the case of solids, fluid surfaces also offer resistance to movement. This resistance, exhibited by a fluid surface, is called fluid friction.
or
A fluid friction is a resistance offered by a fluid against its flow. the fluid friction is better referred as viscosity.
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Amar Kumar 8 years, 4 months ago
Leguminous plants are those which belongs to the Pea family Leguminosae. The plants of this family have ‘Legume’, which is a type of fruit. Other feature of Leguminous plants are root nodules, flower morphology, pinnately compound leaves.
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Amar Kumar 8 years, 4 months ago
Malaria is a mosquito-borne parasitic infection spread by Anopheles mosquitoes. The Plasmodium parasite that causes malaria is neither a virus nor a bacterium – it is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine.
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Amar Kumar 8 years, 4 months ago
A branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws: the mathematical sciences.
Systematic knowledge of the physical or material world gained through observation and experimentation.
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Anjali Sharma 8 years, 4 months ago
The man made chemical Fibres from which fabric is formed are known as synthetic fibres
like
polyester
Acrylic
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Amar Kumar 8 years, 4 months ago
A neuron is an electrically excitable cell of nervous system that receives, processes, and transmits information.The three main parts of a neuron are dendrite, cell body and axon.
Functioning of its three parts.
Dendrite: It detect information and conducts the messages towards the cell body.
Cell body: It contains nucleus, mitochondria, and other cell organelles. It maintains the growth of the cell. Axon: It conducts messages away from the cell body and pass to the next neuron.
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