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Ask QuestionPosted by Anamika Barman 6 years, 3 months ago
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Posted by Gnaneshwar Siva 6 years, 3 months ago
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Meghna Thapar 5 years, 6 months ago
The term megadiverse country refers to any one of a group of nations that harbor the majority of Earth's species and high numbers of endemic species. Conservation International identified 17 megadiverse countries in 1998. Many of them are located in, or partially in, tropical or subtropical regions. Megadiversity Countries is a term used to refer to the world's top biodiversity-rich countries. This country-focused method raises national awareness for biodiversity conservation in nations with high biological diversity, with many species unique to a specific country. The group of megadiversity centres incorporates 12 countries: Mexico, Colombia, Ecuador, Peru, Brazil, Zaire, Madagascar, China, India, Malaysia, Indonesia and Australia. Others increase the list to more than 17, adding Papua New Guinea, South Africa, USA, Congo, Philippines and Venezuela.
Posted by Sukhwinder Singh 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
Tensile Strength is the resistance of a material to breaking under tension.
Hermoine Granger 6 years, 3 months ago
Posted by Arshnoor Kaur 6 years, 3 months ago
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Meghna Thapar 5 years, 10 months ago
Water is the most common fire extinguisher. But it works only when things like wood and paper are on fire. If electrical equipment is on fire, water may conduct electricity and cause fire. Water is also not suitable for fires involving oil and petrol.
Carbon dioxide can be stored at high pressure as a liquid in cylinders. When CO2 is released from the cylinder, it expands enormously in volume and cools down. So, it not only forms a blanket around the fire but also brings down the temperature of the fuel. That is why it is an excellent fire extinguisher.
Posted by Arshnoor Kaur 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
Harmful effects of burning fossil fuels are as following:
(i) Burning of fossil fuels cause air pollution.
(ii) They also cause global warming because they produce greenhouse gas like carbon dioxide on burning.
(iii) They are exhaustible resources, and will be finished in the near future.
Posted by Arshnoor Kaur 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
the capacity of an engine, especially that of a vehicle, to obtain energy from fuel.
Posted by Yash Pacholi 6 years, 3 months ago
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Hermoine Granger 6 years, 3 months ago
Posted by Lal Pratap Singh 6 years, 3 months ago
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Aryan Vats 6 years, 3 months ago
Posted by Anusruth Sini 6 years, 3 months ago
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Arshnoor Kaur 6 years, 3 months ago
Posted by Rekha Jain 6 years, 3 months ago
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Rekha Jain 6 years, 3 months ago
Posted by Pandey Sk 6 years, 3 months ago
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Meghna Thapar 5 years, 10 months ago
Brain is the highest coordinating centre in the body. It is protected by a bony box called cranium, within which are present three layers of fluid-filled membranes called meninges for absorbing shock.
The brain is divided into three regions (i) Forebrain (ii) Midbrain and (iii) Hindbrain.
Posted by Dasaradha Rami Reddy 6 years, 3 months ago
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Ansh Jain 6 years, 3 months ago
Ayesha Khatua 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
The advantages of using compressed natural gas (CNG) and liquified petroleum gas (LPG) as fuels are:
(i) They can be burnt directly.
(ii) They can be transported easily through pipelines.
(iii) They are clean fuels and do not give smoke when burnt.
(iv) They give a lot of heat energy when burnt.
Posted by Shyambhavi Singh 6 years, 3 months ago
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Sameer Sahoo 6 years, 3 months ago
Posted by Saloni Ghadge 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
Our earth is made up of several concentric layers with one inside another. These layers are three in number-crust, mantle and core.
- Crust:
It is the uppermost layer over the earth's surface. It is the thinnest of all the layers. It is about 35 km on the continental masses and only 5 km on the ocean floors.
The continental masses are made up of silica and alumina. It is thus called sima (si-silica and al-alumina). The oceanic crust mainly consists of silica and magnesium. It is thus called sima (si-silica and ma-magnesium).
- Mantle:
It is just beneath the crust. It extends up to a depth of 2900 km below the crust. - Core:
It is the innermost layer. Its radius is about 3500 km. It is mainly made up of nickel and iron and is known as nife (ni-nickel and fe-ferrous, i.e., iron). The central core has very high temperature and pressure.
Posted by Komal Kadiyan 6 years, 3 months ago
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Posted by Jeet P Sulakhe 6 years, 3 months ago
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Posted by Swarnalata Pradhan 6 years, 3 months ago
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Devyansh Kumar Tulshyan 6 years, 3 months ago
Posted by Samareddi Tejaswanth Tinku 6 years, 3 months ago
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🖤 🖤 6 years, 3 months ago
Chingkheinganbi Hijam 6 years, 3 months ago
Posted by Sara Saiyed 6 years, 3 months ago
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Meghna Thapar 5 years, 10 months ago
When a ray of light falls on a plane mirror, it gets reflected. After striking the mirror, the ray of light is reflected in another direction. The process of sending back light rays which fall on the surface of an object, is called reflection of light. The light ray, which strikes any surface, is called the incident ray. The ray that comes back from the surface after reflection is known as the reflected ray. A line making an angle of 90º to the line representing the mirror at the point where the incident ray strikes the mirror is known as the normal to the reflecting surface at that point. The angle between the normal and incident ray is called the angle of incidence. The angle between the normal and the reflected ray is known as the angle of reflection.
Posted by Ishiks Rathi 6 years, 4 months ago
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Rishi Singh 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
- Enzymes are proteins in nature.
- They are produced by the living cells to accelerate the biochemical reactions inside and outside the cells in living organisms. Hence, they are called biocatalysts.
- The active site is the site on the enzyme molecule to which a substrate binds, and it helps to catalyse the chemical reaction.
Posted by Avni Singh 6 years, 4 months ago
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Sameer Sahoo 6 years, 3 months ago
Harshita Gupta 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Fermentation is the breakdown of organic substances by organisms to release energy in the absence of oxygen. For example - The anaerobic breakdown of carbohydrates by yeasts to produce alcohol and carbon dioxide, and the bacterial breakdown of milk sugar to give lactic acid.
Divyansh Sharma. 6 years, 4 months ago
Posted by Rida Shaheen 6 years, 4 months ago
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Swarnalata Pradhan 6 years, 3 months ago
Yogita Ingle 6 years, 4 months ago
Pasteurisation is one type of food preservation method. Pasteurisation is the process developed by Louis Pasteur, especially to store milk. In pasteurisation, milk is first heated to about 70 degrees Celsius for 15 to 30 seconds. Then it is suddenly chilled and stored. This prevents the growth of microbes. Pasteurisation deactivates the microbes and reduces the enzyme activity by reduction of temperature.
Posted by Anushka ?? Singh 6 years, 4 months ago
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Anushka ?? Singh 6 years, 3 months ago
Yogita Ingle 6 years, 4 months ago
Functions of Genes
- Genes control the functions of DNA and RNA.
- Proteins are the most important materials in the human body which not only help by being the building blocks for muscles, connecting tissue and skin but also takes care of the enzymes production.
- These enzymes play an important role in conducting various chemical processes and reactions within the body. Therefore, protein synthesis is responsible for all activities carried on by the body and are mainly controlled by the genes.
- Genes consist of a particular set of instructions or specific functions. For example, globin gene was instructed to produce haemoglobin. Haemoglobin is a protein that helps to carry oxygen in the blood.
Posted by Kumud Si. 6 years, 4 months ago
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Rozy Vaiphei 6 years, 4 months ago
Emma Watson 6 years, 4 months ago
Posted by Kumud Si. 6 years, 4 months ago
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Yogita Ingle 6 years, 4 months ago
The coal which we r using today was formed millions of years ago when giant ferns n swamps got buried under layers of earth. that's why coal is called buried sunshine.
Rozy Vaiphei 6 years, 4 months ago
Posted by Kumud Si. 6 years, 4 months ago
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Seema Gupta 6 years, 3 months ago
Parneet Kaur 6 years, 3 months ago
Rida Shaheen 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Coal and petroleum both are called black gold. Reason for this is both coal and petroleum handles a lot of money, so they are called as black gold.
Posted by Samareddi Tejaswanth Tinku 6 years, 4 months ago
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Sameer Sahoo 6 years, 3 months ago
Rida Shaheen 6 years, 4 months ago
Rozy Vaiphei 6 years, 4 months ago
Posted by Atul Sinha 6 years, 4 months ago
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Meghna Thapar 5 years, 6 months ago
The refining process separates, breaks, reshapes and recombines the molecules of crude oil into value-added products such as gasoline, diesel and aviation fuel. These essential transportation fuels typically account for 75 percent of output. Refining is the process of reducing the impurities in a substance.
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Yogita Ingle 6 years, 3 months ago
Relation between Force and Pressure:
If the Force’ F’ is applied perpendicularly on a surface having area ‘A’ ,
then the force applied per area is = F/A
by the definition it is the pressure on that surface
so,pressure,P = Force(F)/Area(A)
P = F/A
FORCE = PRESSURE ×AREA
2Thank You