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Posted by Sanchit Singla 5 years, 4 months ago (9729622)
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Posted by Arpit Sharma Sharma 5 years, 4 months ago (9720629)
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Posted by Arpit Sharma Sharma 5 years, 4 months ago (9720629)
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Posted by Arpit Sharma Sharma 5 years, 4 months ago (9720629)
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Posted by Arpit Sharma Sharma 5 years, 4 months ago (9720629)
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Posted by Atharv Mani Tripathi 5 years, 4 months ago (8626961)
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Posted by ?? 5 years, 4 months ago (9700895)
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Posted by K.D Nimitha 5 years, 4 months ago (9755037)
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Posted by Sarita Yadav 5 years, 4 months ago (9139029)
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Gaurav Seth 5 years, 4 months ago (2898529)
Bureaucracy stands for the government officers and it includes all the government servants who hold office on permanent basis till they retire at a fixed age.
Bureaucracy, generally, means government by the officers and it includes all the government servants who hold office on permanent basis till they retire at a fixed age. Head of the State and ministers determine the policy. Permanent government servants run the administration and enforce the laws according to that policy. There is no effect on them of the change of head of state and the ministers.
Bureaucracy has been derived from the French word ‘bureau’ which means ‘desk’. Thus, bureaucracy is a government which is run by the persons who sit on desks, means officers.
Posted by Sarita Yadav 5 years, 4 months ago (9139029)
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Posted by Priya ✧*。٩(๑˙╰╯˙๑)و✧*。 5 years, 4 months ago (9704945)
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Swarnima Verma 5 years, 4 months ago (8962172)
Gaurav Seth 5 years, 4 months ago (2898529)
Global warming refers to the increasing temperature of the Earth’s climate system and its related effects. Scientific evidence has conclusively proven that the Earth’s temperature is in fact rising and has risen by 0.85oC. This has an impact has affected different regions differently. The effects include rising sea levels, retreating glaciers, loss of sea ice in the poles, warming global temperatures, changing precipitation, expansion of deserts, etc.
This raises significant threats for humans such as food security from decreasing crop yields, submergence of a low-lying area due to the rising sea. To prevent irreversible damage to the delicate ecosystems on Earth, scientists have decided that global warming should be limited to a maximum of 2.0oC relative to pre-industrial levels. The greenhouse effect plays an important role in the rising temperature. And hence to restrict global warming we need to limit the greenhouse effect and the gaseous emissions that cause the greenhouse effect.
Fourteen of the fifteen years in the 21st century have been the hottest years on record with constant occurrences of extreme weather, cyclones, droughts, floods, etc. All these events are some way or the other have an association with the greenhouse effect and global warming.
Posted by Sai Chandu 5 years, 4 months ago (9402169)
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Posted by Avani Tigote 5 years, 4 months ago (9743598)
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Sneha Sundriyal 5 years, 3 months ago (6511777)
Posted by Shifana Shirin R S 4 years, 9 months ago (8924339)
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Sia ? 4 years, 9 months ago (6945213)
Crystal meth is the common name for crystal methamphetamine, a strong and highly addictive drug that affects the central nervous system. There is no legal use for it.
Posted by Arpit Sharma Sharma 5 years, 4 months ago (9720629)
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Posted by Riya Jasrotia 5 years, 4 months ago (9754845)
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Mayur Buddhe 5 years, 4 months ago (8234442)
Posted by Anand Raj 5 years, 4 months ago (8047014)
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Posted by Varsha Keshari 5 years, 4 months ago (9754028)
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Nandini Ladda 5 years, 4 months ago (9130367)
Priyanshu Kumar Singh 5 years, 4 months ago (9711033)
Anwesha Samantaray 5 years, 4 months ago (9617606)
Manyata Joshi 5 years, 4 months ago (9735624)
Manyata Joshi 5 years, 4 months ago (9735624)
Posted by Arpit Choudhary 5 years, 4 months ago (9707911)
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Posted by Rama Narayana Patra Patra 5 years, 4 months ago (9751740)
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Aanya Gupta 5 years, 4 months ago (9797484)
Posted by M Dinesh 5 years, 4 months ago (9715044)
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Sehaj Gamer? 5 years, 4 months ago (9443330)
Tec Om 5 years, 4 months ago (7036201)
universal set is the set which contain all subsets of other sets and it is denoted by U.
A subset is a set which contain elements of other set.
nullset or empty set does not contain any element
(i)A={x:x is the multiple of 0 <x>18}
Gaurav Seth 5 years, 4 months ago (2898529)
Any Set that does not contain any element is called the empty or null or void set. The symbol used to represent an empty set is – {} or φ. Examples:
- Let A = {x : 9 < x < 10, x is a natural number} will be a null set because there is NO natural number between numbers 9 and 10. Therefore, A = {} or φ
- Let W = {d: d > 8, d is the number of days in a week} will also be a void set because there are only 7 days in a week.
Gaurav Seth 5 years, 4 months ago (2898529)
A universal set is a set which contains all the elements or objects of other sets, including its own elements. It is usually denoted by the symbol ‘U’.
Suppose Set A consist of all even numbers such that, A = {2, 4, 6, 8, 10, …} and set B consist of all odd numbers, such that, B = {1, 3, 5, 7, 9, …}. The universal set U consist of all natural numbers, such that, U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10,….}. Therefore, as we know, all the even and odd numbers are a part of natural numbers. Therefore, Set U has all the elements of Set A and Set B.
Gaurav Seth 5 years, 4 months ago (2898529)
The power set is a set which includes all the subsets including the empty set and the original set itself. It is also a type of sets. If set A = {x,y,z} is a set, then all its subsets {x}, {y}, {z}, {x,y}, {y,z}, {x,z}, {x,y,z} and {} are the elements of powerset, such as:
Power set of A, P(A) = {x}, {y}, {z}, {x,y}, {y,z}, {x,z}, {x,y,z} and {}
Where P(A) denotes the powerset.
Posted by 8B Dharsitha 5 years, 4 months ago (9524623)
- 3 answers
Gursharan Singh 5 years, 4 months ago (9072155)
Qurratulain Numani 5 years, 4 months ago (9723897)
Gaurav Seth 5 years, 4 months ago (2898529)
Lubricant is a substance used to reduce friction between surfaces in contact which reduces heat generated when the surfaces move.
The property of reducing friction bisetween two particles is known as lubricity. Example: oil, grease.
In case of automobiles and machine-parts which tend to get screechy or ineffective over a period of time, we apply substances to make their surfaces smooth and thereby reduce friction. These are called lubricants. You must have seen specific lubricants for automobile parts in petrol stations.
Posted by Ayushi Joshi 5 years, 4 months ago (9754693)
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Devarajrathod Rathod 5 years, 4 months ago (7561741)
Posted by Fakir Mohan Dharua 5 years, 4 months ago (9689034)
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Posted by Atharv Moyal 5 years, 4 months ago (8886696)
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Gaurav Seth 5 years, 4 months ago (2898529)
In this change a new substance is formed, hence it is a Chemical change.
Adding lemon juice changes the acidity of tea.
Tea has polyphenol pigment 7−20% and on adding lemon juice which is acidic, hydrogen ions suppress the ionization of polyphenols and that changes the colour of tea making it lighter.
Therefore, change in the colour of black tea on adding lemon juice is an example of chemical change.
Posted by Rishita Singh 5 years, 4 months ago (9271326)
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Ruhi Rao 5 years, 4 months ago (9723213)
Posted by Rajni Dhurwey 5 years, 4 months ago (9694558)
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Tec Om 5 years, 4 months ago (7036201)
Gaurav Seth 5 years, 4 months ago (2898529)
Ans. When the author got a room of his own in the city home, the old lady accepted her aloofness calmly. She worked on her spinning wheel all day long and recited her prayers. Only in the afternoon did she take a half-hour break to rest and to feed the birds.
Posted by Digeshwar Diwan 5 years, 4 months ago (9754449)
- 2 answers
Ruhi Rao 5 years, 4 months ago (9723213)
Ruhi Rao 5 years, 4 months ago (9723213)
Posted by Daxita Jain 5 years, 4 months ago (8879515)
- 2 answers
Swarnima Verma 5 years, 4 months ago (8962172)

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Ridhi Goyal 5 years, 4 months ago (5651277)
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