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Ask QuestionPosted by Pari Dodhiyawala 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Caste barriers are breaking down in India due to the following reasons :
(i) With the economic development, large scale urbanization, growth of literacy and education, occupational mobility and the weakening of the position of landlords in the villages, the old notions of caste hierarchy are breaking down.
(ii) Due to socio-economic changes, i.e., now, most of the times, in urban areas it does not matter much who is walking along next to us on street or eating at the next table in a restaurant.
(iii) The Constitution of India prohibited any caste-based discrimination and laid the foundations of policies to reserve the injustices of the caste system.
Posted by Bharti Saini 5 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Writing Chemical Equations:
- In a chemical reaction, the reactants are written on the left hand side and the products on the right hand side of the equation.
- An arrow (→) pointing towards the products is inserted between the reactants and the products. It also represents the direction of the reaction.
- A single arrow (→) indicates the direction in which the reaction proceeds.
- A double arrow (⥮) indicates a reversible reaction, i.e. the products recombine to form the reactants.
- A plus sign (+) is inserted between two or more reactants or products formed.
- If reactions are carried out under specific conditions of temperature, pressure, catalyst etc., then these conditions are mentioned on the arrow.
The chemical equation can be made more informative by mentioning the physical states of the reactants and products.
- If gas is liberated as a product then it is represented by an arrow pointing upwards (↑).
- If the product formed is in the form of a precipitate, it is represented by an arrow pointing downwards (↓).
Posted by Irna Gaur 5 years, 11 months ago
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Posted by Gayathri Devi 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
The impression of an object seen by the eye persists on the retina for 1 /16 th of a second, even after the object is removed. If another object is seen before this time, the impressions of the two merge to give us the sensation of continuity. This property of eye is called persistence of vision.
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Yogita Ingle 5 years, 11 months ago
A vascular bundle is a part of the transport system in vascular plants. Vascular bundle is a unit strand of the vascular system in stems and leaves of higher plants, consisting essentially of xylem and phloem. Usually vascular bundle has phloem on the outside and xylem on the inside.
Abhinav ? 5 years, 11 months ago
Posted by ꧁༒Ķïłłěŕ_Ṩนℑåł༒꧂, Sharma 5 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Some terms related to spherical mirrors:
- The centre of curvature (C) of a spherical mirror is the centre of the hollow sphere of glass, of which the spherical mirror is a part.
- The radius of curvature (R) of a spherical mirror is the radius of the hollow sphere of glass, of which the spherical mirror is a part.
- The pole (P) of a spherical mirror is the centre of the mirror.
- The principal axis of a spherical mirror is a straight line passing through the centre of curvature C and pole P of the spherical mirror.
- The principal focus (F) of a concave mirror is a point on the principal axis at which the rays of light incident on the mirror, in a direction parallel to the principal axis, actually meet after reflection from the mirror.
- The principal focus (F) of a convex mirror is a point on the principal axis from which the rays of light incident on the mirror, in a direction parallel to the principal axis, appear to diverge after reflection from the mirror.
- The focal length (f) of a mirror is the distance between its pole (P) and principal focus (F).
For spherical mirrors of small aperture, R = 2f.
Posted by Nikhil Chauhan 5 years, 11 months ago
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Vaishnavi Dhandale 5 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
In circuits using metallic wires, electrons constitute the flow of charges. However, electrons were not known at the time when the phenomenon of electricity was first observed. So, electric current was considered to be the flow of positive charges and the direction of flow of positive charges was taken to be the direction of electric current. The conventional direction of electric current is the one in which positive charges move orderly.
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Shirin .Pvt 5 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Rainwater harvesting is the collection of rain water falling on land for recharging the ground water. The structures of rain water harvesting are: Khadin, Tanks, Kulhs, Ponds, Eris, Tals and Kattas.
Some of the ancient 'water harvesting structures' used in different rural regions of our country are:
|
State |
Water harvesting structures |
|
Rajasthan |
Khadin, tanks, Nadis |
|
Maharashtra |
Bandharas, Tals |
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Uttar Pradesh |
Bhundhis |
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Madhya Pradesh |
Bhundhis |
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Bihar |
Ahars, Pynes |
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Himachal Pradesh |
Kulhs |
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Jammu |
Ponds |
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Tamil Nadu |
Eris |
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Kerals |
Surangams |
|
Karnataka |
Kattas |
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