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Posted by Ravi Meena 7 years, 1 month ago
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Meghna Thapar 5 years, 9 months ago
By Z=3, we mean that the Atomic number (Z) of element is 3.
It's electronic configuration is 2,1.
Hence, the valency of this element is 1 since outermost shell has only one electron.
Therefore the element with Z=3 is Lithium.
Posted by Om Vhanmane 6 years, 8 months ago
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Sia ? 6 years, 8 months ago
Suppose the actual speed of the train be x km/hr and the actual time taken be y hours. Then,
Distance covered =(xy) km ...........(i) [{tex}\therefore{/tex} Distance = Speed {tex}\times{/tex}Time]
If the speed is increased by {tex}6km/hr{/tex}, then time of journey is reduced by 4 hours i.e., when speed is {tex}(x + 6)km/hr{/tex}, time of journey is {tex}(y-4)hours.{/tex}
{tex}\therefore{/tex} Distance covered = {tex}(x + 6) (y - 4){/tex}
{tex}\Rightarrow{/tex}{tex}xy = (x + 6) (y - 4){/tex} [Using (i)]
{tex}\Rightarrow{/tex}{tex}-4x + 6y -24=0{/tex}
{tex}\Rightarrow{/tex}{tex}-2x + 3y -12=0{/tex} ..........(ii)
when the speed is reduced by 6 km/hr, then the time of journey is increased by 6 hours i.e.,
when speed is {tex}(x-6)km/hr{/tex}, time of journey is {tex}(y - 6)hours.{/tex}
{tex}\therefore{/tex} Distance covered ={tex}(x -6) (y + 6){/tex}
{tex}\Rightarrow{/tex} {tex}xy = (x - 6) (y + 6){/tex} [Using (i)]
{tex}\Rightarrow{/tex} {tex}6x - 6y -36 =0{/tex}
{tex}\Rightarrow{/tex} {tex}x - y -6=0 {/tex}...........(iii)
Thus, we obtain the following system of equations:
{tex}-2x + 3y -12 =0{/tex}
{tex}x - y - 6=0{/tex}
By using cross-multiplication, we have
{tex}\frac { x } { 3 \times - 6 - ( - 1 ) \times - 12 } = \frac { - y } { - 2 \times - 6 - 1 \times - 12 } = \frac { 1 } { - 2 \times - 1 - 1 \times 3 }{/tex}
{tex}\Rightarrow \quad \frac { x } { - 30 } = \frac { - y } { 24 } = \frac { 1 } { - 1 }{/tex}
{tex}\Rightarrow{/tex} {tex}x =30\ and\ y=24.{/tex}
Putting the values of x and y in equation (i), we obtain
Distance= {tex}(30\times24)km =720km.{/tex}
Hence, the length of the journey is {tex}720 km{/tex}.
Posted by Nayan Shah 7 years, 1 month ago
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Krishna Gaud 7 years, 1 month ago
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Ram Kushwah 7 years, 1 month ago
When a circle is evenly divided into four sections by two perpendicular lines,
each of the four areas is a quadrant
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Pratyush Raj 7 years, 1 month ago
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Manish Bishnoi 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Rani Lakshmibai of Jhansi wanted the East India Company to recognise her adopted son as the heir to the kingdom of Jhansi after the death of her husband. The British however, refused to accept her adopted son as the king and annexed Jhansi under the Doctrine of Lapse.
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Yogita Ingle 7 years, 1 month ago
Tribal societies were absolutely different from those which existed in big cities. They did not follow the social rules and rituals, prescribed by the Brahmanas because they divided societies into numerous unequal classes. These societies were known as tribes. There was a unique bond of kinship among the members of each tribe.
Posted by Saizan Waris 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
The division of the country was done on the basis of religion. As a result of this division more than a million people had been killed in riots between Hindus and Muslims. In such circumstances, it was not wise to further divide the country on the basis of language. Nor the country would have afforded further division on the basis of language.
Therefore, both Prime Minister Nehru and Deputy Prime Minister Patel were against the creation of linguistic states.
Posted by Rishav Kumar Rk 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
- Raja Ravi Varma was known for fusion of European Techniques with the Indian Art form. Most of his subjects are Hindu mythology and the medium used involved oil colors. He was the first Indian to use western technique of perspective. He also made lithographers. If you study the history of Indian schools of art before the Bengal and Modern Period, you'd realize that perspective was missing. He was, however, criticized for adding western elements in Hindu Mythological art.
- Abanindranath Tagore's art, on the other side, has influence of Mughal and Rajput art. He has extenstively used the Wash Method acquired from his Japanese acquaintance. There is a prominent influence of Japanese and Chinese art form in his artworks. His subject focused on the Eastern lifestyle in India. The art has fine lines. He tried to revive Indian art.
Posted by Shreevidya Chakravarty 7 years, 1 month ago
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Krishna Gaud 7 years, 1 month ago
1Thank You