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What was Dr sadao opinion about Americans? 

 

Posted by Jhanvi Garg (Jul 25, 2017 9:47 p.m.) (Question ID: 6940)

  • Dr, Sadao Hoki was a Japenese doctor and after receiving an American solider half dead at the very doorstep of his own home, he performed the duty of both a Doctor as well as a Japenese citizen by informing about the enemy soldier to the Japenese authorities. So this proves that Dr Sadao Hoki had no bad heartly intentions towards Americans.

    Posted by Ayush Pandey (Jul 26, 2017 10:27 a.m.)
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PT 1 grammar portion 

 

Posted by Deepak To Kumar (Jul 25, 2017 9:30 p.m.) (Question ID: 6939)

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हम पंछी उन्मुक्त गगन के कविता में आया हुआ 'तारक' शब्द का अर्थ 

Posted by Kanad Mithawala (Jul 25, 2017 9:25 p.m.) (Question ID: 6938)

  • मेरे को भी जानना है। जरा जल्दी उत्तर भेजिये।

    Posted by Arpan Bhowmick (Jul 25, 2017 10 p.m.)
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  • वे कहते हैं कि हमारे तो अरमान थे कि में नीले आकाश में तब तक उड़ते रहें, जब तक की उसकी सीमा को खोज नहीं पाते। साथ ही हम सूरज की लाल किरण के जैसे अपनी चोंच में तारों रूपी अनार के लाल-लाल दोनों को चुगने का स्वपन देखते थे। परन्तु गुलामी के कारण यह संभव नहीं है।

    तारक का अर्थ है तारों !

    Answered by Payal Singh (Jul 26, 2017 6:42 p.m.)
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Why respiration is called exothermic reaction

Posted by Badal Singh (Jul 25, 2017 8:59 p.m.) (Question ID: 6937)

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  • Because it releases energy due to oxidation.

    Answered by Dr Pathikrt Banerjee (Jul 26, 2017 1:11 p.m.)
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  • Because respiration  produce energy.

    Answered by Sudhanshu Baranwal (Jul 25, 2017 10:42 p.m.)
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Prime minister runs the country .chief minister runs the state .logically then,the chairman of zilla parishad should run the district.why does the D.M or collector  administer the district?

Posted by Mukesh Kumar Verma (Jul 25, 2017 8:42 p.m.) (Question ID: 6936)

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What is the distance between the earth and the moon ? 

Posted by Raju Chouhan (Jul 25, 2017 8:29 p.m.) (Question ID: 6935)

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  • 384400km

    Answered by Ujwal G (Jul 25, 2017 8:42 p.m.)
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History is associated with dates. Give reason for this statement.

Posted by Arpan Bhowmick (Jul 25, 2017 8:22 p.m.) (Question ID: 6934)

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  • History is about changes which occur over a time. It is about finding out how things have changed. As soon as we compare the past with the present we have to talk of a time period which has to be decided by dates.

    Answered by Ujwal G (Jul 25, 2017 9:59 p.m.)
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Which is the best reference book in English for practicing grammar, literature, writing skills. Please name one.

Posted by Shivani Shivi (Jul 25, 2017 8:19 p.m.) (Question ID: 6933)

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  • All in One by arihant is best for learning and practising the class 12th english course.

    Answered by Nita Srivastav (Jul 26, 2017 12:41 p.m.)
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Subtract the first integer from the second:

-135,-125

Explain how with step.

Posted by Rohini Yadav (Jul 25, 2017 8:16 p.m.) (Question ID: 6932)

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  • -125-(-135)

    =-125+135

    =135-125

    =10

    Answered by Arpan Bhowmick (Jul 25, 2017 8:29 p.m.)
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  • -125-(-135)

    = -125+135

    = 10

    Answered by Shivani Shivi (Jul 25, 2017 8:24 p.m.)
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Which books are best for securing more than 95 marks in mathematics. Is ncert and ncert exemplar enough?

Posted by Shivani Shivi (Jul 25, 2017 8:13 p.m.) (Question ID: 6931)

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How does the brook 'sparkle'?

 

Posted by Abhijeeth Chandra (Jul 25, 2017 7:59 p.m.) (Question ID: 6930)

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what the two basic tools used for comparing an underdeveloped country with a developed one? what organizations developed these tools.?

Posted by Surya S Nair (Jul 25, 2017 7:47 p.m.) (Question ID: 6929)

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A polynomial in x of third degree which will vanish when x=1 & x=-2 and will have the values 4 & 28 when x=-1 and x=2 respectively is_______.

Posted by Sudhanshu Baranwal (Jul 25, 2017 7:43 p.m.) (Question ID: 6928)

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Using factor theorem, show that a-b, b-c, c-a are the factors of a(b2-c2) +b(c2-a2) +c(a2-b2).

Posted by Sudhanshu Baranwal (Jul 25, 2017 7:39 p.m.) (Question ID: 6927)

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  • If a - b is a factor of given expression, then a - b = 0 => a = b

    Putting a = b, in the given expression, we get

    b(b<font size="2">2</font>-c<font size="2">2</font>) +b(c<font size="2">2</font>- b<font size="2">2</font>) +c(b<font size="2">2</font>- b<font size="2">2</font>)

    = b3 - bc<font size="2">2</font> + bc<font size="2">2</font>  - b<font size="2">3</font> + c(0)

    = 0

    Therefore, (a - b) is a factor of given expression.

    Again if (b - c) is a factor of given expression, then

    Putting b - c = 0 => b = c in the given expression, we get

    a(c<font size="2">2 </font>- c<font size="2">2</font>) +c(c<font size="2">2 </font>- a<font size="2">2</font>) + c(a<font size="2">2 </font>- c<font size="2">2</font>)

    = a(0) + c3 - ca2 + ca2 - c3 

    = 0

    Therefore, (b - c) is a factor of given expression.

    Again if (c - a) is a factor of given expression, then

    Putting c - a = 0 => c = a in the given expression, we get

    a(b<font size="2">2 </font>- a<font size="2">2</font>) + b(a<font size="2">2 </font>- a<font size="2">2</font>) + a(a<font size="2">2 </font>- b<font size="2">2</font>)

    = ab2 - a<font size="2">3</font> + b(0) + a3 - ab2

    = 0

    Therefore, (c - a) is a factor of given expression

    Answered by Rashmi Bajpayee (Jul 27, 2017 11:02 a.m.)
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Factorise I) 1+x4+x8

II) x + 4

Posted by Sudhanshu Baranwal (Jul 25, 2017 7:35 p.m.) (Question ID: 6926)

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  • ||) {tex}{x^4} + 4 = {x^2} + {2^2} = {\left( {x + 2} \right)^2} - 2 \times x \times 2{/tex}         [Since {tex}{a^2} + {b^2} = {\left( {a + b} \right)^2} - 2ab{/tex}]

    {tex}{\left( {x + 2} \right)^2} - 4x{/tex}

    {tex}{\left( {x + 2} \right)^2} - {\left( {2\sqrt x } \right)^2}{/tex}

    {tex}\left( {x + 2 - 2\sqrt x } \right)\left( {x + 2 + 2\sqrt x } \right){/tex}

    {tex}\left( {x + 2\sqrt x + 2} \right)\left( {x - 2\sqrt x + 2} \right){/tex}

     

     

    Answered by Rashmi Bajpayee (Jul 27, 2017 11:29 a.m.)
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  • |) 1+x<font size="2">4</font>+x<font size="2">8</font><font size="2"> = x8 + x4 + 1</font>

    Adding and subtracting 2(x4)(1)

    {tex}{\left( {{x^4}} \right)^2} + 2\left( {{x^4}} \right)\left( 1 \right) + {\left( 1 \right)^2} - 2\left( {{x^4}} \right) + {x^4} = {\left( {{x^4} + 1} \right)^2} - {x^4}{/tex}

    {tex}\left( {{x^4} + 1 + {x^2}} \right)\left( {{x^4} + 1 - {x^2}} \right) = \left( {{x^4} + {x^2} + 1} \right)\left( {{x^4} - {x^2} + 1} \right){/tex}

    {tex}\left[ {{{\left( {{x^2}} \right)}^2} + 2\left( {{x^2}} \right)\left( 1 \right) + 1 - 2\left( {{x^2}} \right)\left( 1 \right) + {x^2}} \right]\left( {{x^4} - {x^2} + 1} \right){/tex}

    {tex}\left[ {{{\left( {{x^2} + 1} \right)}^2} - {x^2}} \right]\left( {{x^4} - {x^2} + 1} \right){/tex}

    {tex}\left( {{x^2} + 1 + x} \right)\left( {{x^2} + 1 - x} \right)\left( {{x^4} - {x^2} + 1} \right){/tex}

    {tex}\left( {{x^2} + x + 1} \right)\left( {{x^2} - x + 1} \right)\left( {{x^4} - {x^2} + 1} \right){/tex}

     

     

    Answered by Rashmi Bajpayee (Jul 27, 2017 11:24 a.m.)
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If x, y, z are all different real numbers, then prove that

1/(x-y) + 1/(y-z) + 1/(z-x)2  = (1/x-y + 1/y-z + 1/z-x)2

Posted by Sudhanshu Baranwal (Jul 25, 2017 7:33 p.m.) (Question ID: 6925)

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What is the work of cultivators?

Posted by Tingnyam Wangnao (Jul 25, 2017 7:18 p.m.) (Question ID: 6924)

  • It is sst question not english!!

    Posted by Arpan Bhowmick (Jul 25, 2017 8:35 p.m.)
  • Is it a English literature question or something else ? 

    Posted by Raju Chouhan (Jul 25, 2017 8:07 p.m.)
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which guide is best for study and score excellence mark in class 10 for subject

  1. social science
  2. science
  3. maths
  4. english
  5. hindi
Posted by Chitesh Sarve (Jul 25, 2017 7:06 p.m.) (Question ID: 6923)

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  • Shiv das and evergreen is best for math

    Answered by Mukul Kumar (Jul 26, 2017 7:43 a.m.)
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  • My cbse guide

    Answered by Arpan Bhowmick (Jul 25, 2017 8:36 p.m.)
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  • english

    Answered by Kema Madan Mohan (Jul 25, 2017 7:47 p.m.)
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find the value of the polynomial 4 + x2 - x + 2x2 at x = -2

Posted by Guru Ram (Jul 25, 2017 6:49 p.m.) (Question ID: 6922)

  • I think your question has some error.. 

    Check i think  polynomial in given question is 4+x2-x+2x3​​​​​​​.

    Posted by Dharmendra Kumar (Jul 25, 2017 11:15 p.m.)
  • class teacher ans -6

    Posted by Guru Ram (Jul 25, 2017 7:38 p.m.)
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  • So if polynomial p(x)= 4+x2-x+2x3

    Then at x=-2

    p(-2)=4+(-2)2-(-2)+2(-2)3

            =4+4+2+2×(-8)

            =10-16

            =-6

     

     

     

    Answered by Dharmendra Kumar (Jul 25, 2017 11:17 p.m.)
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  • Let p(x)=4+x2-x+2x2

                    =3x2-x+4

    At x=-2

    p(-2)= 3×(-2)2-(-2)+4

            =3×4+2+4

            =12+2+4

            =18

    Answered by Dharmendra Kumar (Jul 25, 2017 7:06 p.m.)
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what does helen mean by the expression the shadow of prision house on rest

Posted by Shabana Sultana (Jul 25, 2017 5:44 p.m.) (Question ID: 6921)

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How to find value of cos 20 degree 

Posted by Aman Srivastava (Jul 25, 2017 4:56 p.m.) (Question ID: 6920)

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Round off in general rule

213+49

Round off to nearest 10

 

Posted by Jaweed Ali (Jul 25, 2017 4:31 p.m.) (Question ID: 6919)

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  • 213 is rounded off to 210

    49 is rounded off to 50

    So 210 + 50 = 260

    Answered by Payal Singh (Jul 25, 2017 6:37 p.m.)
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Why we take closed surface in gauss theorem

Posted by Raghav Agarwal (Jul 25, 2017 4:25 p.m.) (Question ID: 6918)

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  • to make electric flux equal to zero.

    Answered by Dr Pathikrt Banerjee (Jul 25, 2017 6:42 p.m.)
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A stone is dropped from the top of cliff. It covers a distance of 24.5 in the second of its motion.find the height of the cliff?

Posted by Sheetal Yadav (Jul 25, 2017 2:08 p.m.) (Question ID: 6917)

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  • Distance travelled in last second of journey = 24.5 m 

    Applying,

    s​​​​​​n{tex}u+{1\over 2}a(2n-1){/tex}

    as initial velocity u = 0 and body is under freely Fall so a = g = 9.8 

    {tex}24.1 = 0 +{9.8\over 2}(2n-1){/tex}

    {tex}=> 5 = 2n-1{/tex}

    => n = 3

    It means body was in air for 3 seconds.

    Total distance covered in 3 seconds

    {tex}s = {1\over 2}gt^2{/tex}

    {tex}=> s = {1\over 2}\times 9.8\times 9{/tex}

    => s = 44.1 m

     

    Answered by Payal Singh (Jul 25, 2017 6:51 p.m.)
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  • <pre>(1/2)g((t+1)2-t2)=24.5</pre>

    Ans= 44 m

    Answered by Dr Pathikrt Banerjee (Jul 25, 2017 6:45 p.m.)
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Supplement exercise with solutions of mathematics for class XI

Posted by Shreya Trivedi (Jul 25, 2017 7:11 a.m.) (Question ID: 6916)

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Format of informal letter and formal letter in English 

Posted by Ayushi Ruparel (Jul 25, 2017 6:24 a.m.) (Question ID: 6915)

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  • Informal

    From:                                                                                                                                                        - - - - - - - - means  

    Name                                                                                                                                                              to leave a line

    Address

    -----------

    Date:(month in words)(don't write "date")

    -----------

    Dear _________,

    Introduction

    ----------------

    Elaboration

    ----------------

    Conclusion

    Yours affectionately,

    (your name)

     

     

    Answered by Gokhul Manikandan (Jul 25, 2017 7:50 p.m.)
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If hot air rises than why the mountains are always covered with snow? 

Posted by Hritik Chaudhary (Jul 24, 2017 10:37 p.m.) (Question ID: 6914)

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  • When a parcel of air warms up near the surface of the earth, it will rise. But as it rises, it moves into regions of lower pressure. The pressure of the atmosphere drops with altitude, by about 10 kPa (100 millibar) per 1000 m.

    As a rising parcel of air moves into regions of lower pressure, it expands. And as it expands, it cools. The air has to do work to expand, and so its temperature must decrease—the only possible source of energy for the work of the expansion is the thermal energy of the gas.

    The atmosphere is more complicated, because moisture plays a role. As the air cools, water vapor can condense, giving up latent heat to form snow.

    Answered by Payal Singh (Jul 25, 2017 7:51 a.m.)
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The band is playing a national song give passive form

Posted by Harsh Kaushik (Jul 24, 2017 10:11 p.m.) (Question ID: 6913)

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  • The national song is being played by a band.

    Answered by Arpan Bhowmick (Jul 25, 2017 8:39 p.m.)
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  • A national song is being played by a band.

    Answered by Payal Singh (Jul 25, 2017 7:51 a.m.)
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  • a national song is being played by a band

    Answered by Shubhangi Tanwar (Jul 24, 2017 11:21 p.m.)
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Can I change the medium from Hindi to English of Social Science in Class 10 Board exam?

Will there any deduction of marks?

 

Posted by Mozaffar Alam (Jul 24, 2017 9:43 p.m.) (Question ID: 6912)

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what were the qualification necessary to  become a member of a committee of the sabha in the chola empire?

Posted by Arpit Dubey (Jul 24, 2017 9:15 p.m.) (Question ID: 6911)

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  • Qualifications necessary to become a member of a committee of the sabha in the Chola Empire:

    • Members of the sabha should be owners of land from which land revenue is collected.
    • They should have their own homes.
    • They should be between 35 and 70 years of age.
    • They should have knowledge of the Vedas.
    • They should be well-versed in administrative matters and honest.
    Answered by Sahdev Sharma (Jul 25, 2017 7:54 a.m.)
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  • Qualifications necessary to become a member of a committee of the sabha in the Chola Empire:

    (i) Members of the sabha should be owners of land from which land revenue is collected.

    (ii) They should have their own homes.

    (iii) They should be between 35 and 70 years of age.

    (iv) They should have knowledge of the Vedas.

    (v) They should be well-versed in administrative matters and honest.

    (vi) Not has been a member of any committee in the last three years.

    (vii) They should submit his accounts as well as of relatives to contest election.

    Answered by Payal Singh (Jul 25, 2017 7:53 a.m.)
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