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Apeksha Pawaria 5 years, 3 months ago
Yogita Ingle 5 years, 3 months ago
A covalent bond is formed by sharing of electrons ex. in a molecule of nitrogen two atoms are bonded covalently ( at. no. of N2 is 7 so it contains 3 electrons in 2p shell it needs 3 electrons to complete its octet so in a molecule of nitrogen both atoms contribute 3 electrons which are then shared by both and thus they attain nearest nobel gas configuration).
In a Coordinate bond both atoms contribute equal no. of electrons but they are not shared ex. HCl In hydrochloric acid both hydrogen and chlorine contribute one electron to the bond but chlorine being more electronegative than hydrogen exerts attracts the electron pair towards itself.
Posted by Shubham Patil 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Energy is a conserved quantity and the law of conservation of energy states that energy can neither be created nor destroyed but can only be converted from one form to another. The SI unit of energy is Joule.
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Yogita Ingle 5 years, 3 months ago
The odd way in which he grandmother behaved before she died was that the evening the narrator returned for abroad, she didn't pray. Instead, she collected women of the neighborhood and sang of the homecoming of warriors while thumping a sagging, dilapidated drum for hours. It was the first time in years that she did not pray.
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Yogita Ingle 5 years, 3 months ago
Physical geography includes study of Lithosphere, Atmosphere, Hydrosphere & Biosphere- each element is very important for human beings.
Landforms provide base for agriculture, industries, transport and communication, and settlements. Mountains provide water to rivers, forests-center for tourist spots.
Climate influences on the cropping pattern, livestock, food and clothes of the people.
limate and precipitation influence the type of forests. Oceans provide food, water transport, and influence the climate; they are the source of hydrological cycle. (i) Geomorphology is devoted to the study of land forms, their evolution and related processes.
(ii) Climatology encompasses the study of structure of atmosphere and elements of weather and climates and climatic types and regions.
(iii) Hydrology studies the realm of water over the surface of the earth including oceans, lakes, rivers and other water bodies and its effect on different life forms including human life and their activities.
(iv) Soil Geography is devoted to study the processes of soil formation, soil types, their fertility status, distribution and use
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Yogita Ingle 5 years, 3 months ago
Each base quantity is defined in terms of a certain basic arbitrarily chosenbut properly standardised reference standard called unit (such as metre,kilogram,second,ampere,kelvin,mole,and candela.The units for the fundamental base quantities are called fundamental or base units and two supplementary units in relation to quantities plane angle and solid angle radian, Ste radian..
Supplementary units are the dimensionless units that are used along with the base units to form derived units in the International system. The class of supplementary contains only two purely geometrical units, that is the radian and the steradian.The supplementary unit of plane angle is radian and that of solid angle is steradian.
Posted by Swati Kumari 5 years, 3 months ago
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Ved Prakash 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
A photon is a tiny particle of light. It is the tiniest particle of light possible in nature. A photon can also be described as a type of quantum, that is, a tiny particle. Some other types of quanta (plural) are electrons, neutrinos, and the Higgs boson.
A quantum is the tiniest particle possible of a particular substance. For example, in the case of an electron, it’s the tiniest particle possible of negatively-charged matter, just as a photon is the tiniest particle possible of light.
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Simran Sarao 5 years, 3 months ago
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Parisha Dahiya 5 years, 3 months ago
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