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Posted by Himanshu Mishra 5 years, 3 months ago (7085296)
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Yogita Ingle 5 years, 3 months ago (2577571)
A change which can happen backward, that is, can be reversed is called a reversible change. If you keep water in the freezer for some time, it transforms into ice. But as soon as you take it out of the freezer, it turns into water again. This is a reversible change.
Posted by Royal Thakur ? 5 years, 3 months ago (9579994)
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Neel Singh 5 years, 3 months ago (8013192)
Meghna Thapar 5 years, 3 months ago (6237)
Electrons within an atom can be assessed according to the shell, subshell, and orbital to which they are assigned. These assessments are based on the quantum mechanical model. Shells are numbered as n=1,2,3,4, etc. and increase in size and energy as they get further away from the nucleus.
Shells can be subdivided into subshells. The maximum number of subshells is equivalent to the shell number. For example, when n=1 (first shell), only one subshell is possible and when n=2 (second shell), two subshells are possible.
There are four different types of subshells. These various types of subshells are denoted by the letters s, p, d, and f. Each subshell has a maximum number of electrons which it can hold: s - 2 electrons, p - 6 electrons, d - 10 electrons, and f - 14 electrons. The s subshell is the lowest energy subshell and the f subshell is the highest energy subshell.
As was mentioned previously, the shell number is equal to the possible number of subshells. Thus, when n=1, the only subshell possible is the 1s subshell. When n=2, two subshells are possible the 2s and 2p. When n=3, three subshells are possible the 3s, 3p, and 3d. This means that in the first shell only two electrons are possible and they would be found in the 1s (2 electrons) subshell. In the second shell, 8 electrons are possible and would be found in the 2s (2 electrons) and the 2p (6 electrons) subshells.
Each subshell is further divided into orbitals. An orbital is defined as a region of space in which an electron can be found. Only two electrons are possible per orbital. Thus, the s subshell may contain only one orbital and the p subshell may contain three orbitals.
Each orbital has its own distinct shape. An s orbital found in a s subshell is spherical, p orbitals found in p subshells are two-lobed, and d orbitals found in d subshells are four-lobed. Since d and f orbitals do not play an important role in organic chemistry, they will not be discussed further.
Since there are three possible orbitals per p subshell, each orbital adopts its own orientation. The px orbital lies along the x axis, the py orbital lies along the y axis, and the pz orbital lies along the z axis.
Posted by Sangita Kumari 5 years, 3 months ago (9373994)
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Posted by Vibhav Mishra Vibhav Mishra 5 years, 3 months ago (9537113)
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Aryan Magar 5 years, 3 months ago (9814824)
Yogita Ingle 5 years, 3 months ago (2577571)
Warmth is necessary for germinating of seeds. It is required for the plant because the enzymes which help in germination work faster in warm temperatures.
Vibhav Mishra Vibhav Mishra 5 years, 3 months ago (9537113)
Posted by Nitish Sardhana 5 years, 3 months ago (9798823)
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Yogita Ingle 5 years, 3 months ago (2577571)
Operating system is software that enables computer to understand the computer components commands given by the user. Operating system works as an interface between the computer hardware and the user.
Posted by Kayalvizhi Kayalvizhi 5 years, 3 months ago (9800434)
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Posted by Suryansh Rana 5 years, 3 months ago (5716742)
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Gaurav Seth 5 years, 3 months ago (2898529)
15 – A
Green Enclave
City
October 13, 2019
The Editor
The Indian Express
Firoz Gandhi Market
City
Subject: The Problem of Severe Water Crisis Looming Large in India
Sir:
I am writing to your esteemed self to draw people and authorities’ attention towards the ever worsening problem of water shortage across the nation. Owing to so many factors water scarcity problem has become quite serious. The water supply in South India, Maharashtra, M.P., Delhi, U.P., etc. has fallen to minimum level. It is feared by 2020 the water tables underground will run dry.
There is need of changing our attitude towards water conservation. People should not waste water at all. They should use it sagaciously and like a rare commodity. Apart from this the Government should also address the problem at the base level. Proper afforestation around the city, especially along the rivers and canals should be done.
All the water resources in the country should be interlinked. Flood water-management by channeling it to water-shortage areas should be done. The sea water should be converted into potable water in coastal areas. This expertise can be sought from Israel.
The Government should also make strict laws to conserve water and environment. People should be involved in water preservation and conservation campaigns. Without people’s participation water scarcity problem can’t be solved. I appeal to you to publish my views in your reputed daily. I also appeal to people and concerned authorities to look into the matter and shoulder their responsibilities in solving the problem. Thanking you.
Yours truly,
Shalini
Posted by Gagan Sharma 5 years, 3 months ago (9235850)
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Vidushi Malik 5 years, 3 months ago (9775735)
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Pratibha Kushwah 5 years, 3 months ago (9321133)
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Tarannum Jahan 5 years, 3 months ago (5238866)
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Tanya ?? 5 years, 3 months ago (9516882)
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Yogita Ingle 5 years, 3 months ago (2577571)
Moral Reason: The avoiding conflict in society and preventing majority tyranny are considered as prudential reasons for power sharing. Maintaining the spirit of democracy is considered as the moral reason for power sharing.
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Tushar Hooda 5 years, 3 months ago (5076025)
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Yogita Ingle 5 years, 3 months ago (2577571)
Mandela believed that the oppressed and the oppressor must be liberated. An oppressor is a prisoner of hatred. No one is free if he takes away someone else's freedom. So, he said that the oppressed and the oppressor alike are robbed of their humanity.
Posted by Mukesh Panchal 5 years, 3 months ago (9070824)
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Gaurav Seth 5 years, 3 months ago (2898529)
बड़े भाई ने छोटे भाई को प्रभावित करने के लिए अनुभव और बड़प्पन का महत्त्व समझाया। उसने बताया कि आदमी को तजुर्बे से समझ आती है, पढ़ने-लिखने से नहीं। इसके लिए उसने अपनी अम्माँ और दादा का उदाहरण दिया। वे कम पढ़-लिखकर भी उम्र के कारण अधिक समझदार हैं। फिर उसने बीमारी के इलाज, घर-खर्च और शेष प्रबंधों का उदाहरण दिया। उसने बताया कि कैसे सुशिक्षित हेडमास्टर के घर का सारा सुप्रबंध उनकी बूढ़ी माँ करती है। इन सब युक्तियों को सुनकर छोटे भाई का हृदय प्रभावित हो गया। उसे बड़ा होने के कारण अपने बड़े भाई पर श्रद्धा हो गई।
Posted by Deepak Sharma 5 years, 3 months ago (7215239)
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Abhishek Gupta 5 years, 3 months ago (9363206)
Posted by Deepak Sharma 5 years, 3 months ago (7215239)
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Nishika Huria 5 years, 3 months ago (9739116)
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Yogita Ingle 5 years, 3 months ago (2577571)
Maddie was a very kind hearten girl. She did not like teasing others, even though she has joined other girls to tease Wanda. She was not a very confident girl, as she wanted to stop Peggy from her doings. She feared Peggy as she will be the next victim for her non-sense. But she was able to conquer her fears when Wanda left the school/ They collected the courage to went up to Wanda's house and apologize her for not taking the step to stop Peggy. She changed herself at the cost of her friendship with Peggy, so no other girl will have to face the teasing from her on poor dressing or unusual names.
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