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Difference between biotic and abiotic environment

Posted by Neelam Kushwah (Mar 27, 2017 10:37 p.m.) (Question ID: 4555)

  • Answers:
  • Living components like plants, animals and microbes from the biotic environemnt while non-living components like soil, water, temperature forms the abiotic components of environment.

    Answered by RAJENDRA SINGH (Mar 28, 2017 8:26 a.m.)
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Odd number in divisible by 2

 

Posted by NITU KUMARI (Mar 23, 2017 11:10 p.m.) (Question ID: 4469)

  • Answers:
  • Ans.No, Odd numbers are not divisible by 2.

    Answered by Naveen Sharma (Mar 23, 2017 11:43 p.m.)
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Is the process of photosynthesis a chemical change?plss guys urgent tmr is my science exam

Posted by Iniya Jeyaganesh (Mar 22, 2017 7:30 p.m.) (Question ID: 4404)

  • Answers:
  • Ans. Yes it is.

    Answered by Naveen Sharma (Mar 23, 2017 5:23 a.m.)
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Is the breaking down of ozone into oxygen a chemical change?plss guys urgent tmr is my science exam

Posted by Iniya Jeyaganesh (Mar 22, 2017 7:30 p.m.) (Question ID: 4403)

  • Answers:
  • Ans. Yes it is chemical change.

    Answered by Naveen Sharma (Mar 23, 2017 5:24 a.m.)
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How do a electric bell work? plss guys urgent tmr is my science exam

Posted by Iniya Jeyaganesh (Mar 22, 2017 7:29 p.m.) (Question ID: 4402)

  • Answers:
  • Ans. An electric bell contains an electromagnet, consisting of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods become magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring.

    Answered by Naveen Sharma (Mar 23, 2017 4:41 a.m.)
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How to find time taken for one oscillation?

Posted by Iniya Jeyaganesh (Mar 21, 2017 10:25 p.m.) (Question ID: 4364)

  • Answers:
  • Time taken in one oscillation is called frequency. It can be calcuated by dividing the number of oscillation by time taken.

     

    Answered by RAJENDRA SINGH (Mar 22, 2017 8 a.m.)
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How is sewage disposed in an aeroplane?

Posted by Iniya Jeyaganesh (Mar 21, 2017 7:18 p.m.) (Question ID: 4347)

  • Answers:
  • Ans. Waste water created in flight is stored in a holding tank on the aircraft until the plane sets down. When it's on the ground, a service truck rolls up and pumps the contents of the plane's holding tank aboard. A waste station at the airport serves to empty the truck's tank into the community waste water processing system.

    Answered by Naveen Sharma (Mar 21, 2017 7:48 p.m.)
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literary & archaeological sources of modern period

Posted by Aanvi Gupta (Mar 19, 2017 12:03 p.m.) (Question ID: 4097)

Why led the British to record every aspect of their administration in india? do you think they were answerable to somebody? give reasons to support your argument.

Posted by Aanvi Gupta (Mar 18, 2017 7:07 p.m.) (Question ID: 4068)

Why britisher conducted so many surveys in india

Posted by Aanvi Gupta (Mar 18, 2017 6:59 p.m.) (Question ID: 4067)

you wish to become a sports star when you grow up but your father wants you  be an engineer. Write a shoet diary entry in about 50-60 words expressing your feelings on the issue.

Posted by Komal Garg (Mar 17, 2017 5:30 p.m.) (Question ID: 3998)

How is cricket different from other team games?

Posted by Komal Garg (Mar 16, 2017 3:34 p.m.) (Question ID: 3918)

  • Answers:
  • Ans. Cricket is Different From Other Team Games in any ways:

    •  Unlike other modern games like football, baseball or tennis test cricket is a long- drawn-out game lasting 5 days and can even then end in a draw. Even its shortened version of limited over's takes double the time as compared to baseball.
    • Unlike other games where the size of the playing field is specified, in cricket only the size of the pitch is specified as 22 yards, the size of the ball, bat, bail and stumps is regulated, but the size and shape of the ground are not specified. The playing field can vary from round to oval to rectangular.
    •  Unlike golf and tennis, cricket has refused to remake its tools with industrial manmade materials like plastic, fibre glass and metal
    Answered by Naveen Sharma (Mar 16, 2017 6:01 p.m.)
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Some example of warm and cold ocean currents.

Posted by Iniya Jeyaganesh (Mar 15, 2017 7:53 p.m.) (Question ID: 3865)

  • Answers:
  • Warm currents:

    • North equitorial current
    • Japan current
    • North pacific current
    • Monsoon drift

    Cold currents:

    • West wind drift
    • Canary current
    • Greenland current
    • Labrador current
    Answered by Aanvi Gupta (Mar 18, 2017 7:04 p.m.)
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  • Gulf stream, Somali.kuroshio

    Answered by Kritika Jain (Mar 15, 2017 9:10 p.m.)
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On which date is Odisha hit by a cyclone in in the year 1999 ?

Posted by Iniya Jeyaganesh (Mar 15, 2017 7:39 p.m.) (Question ID: 3860)

  • Answers:
  • 29oct1999

    Answered by Kritika Jain (Mar 15, 2017 7:57 p.m.)
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Define Global Warming

Posted by Iniya Jeyaganesh (Mar 15, 2017 7:22 p.m.) (Question ID: 3857)

  • Answers:
  • Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.

    Answered by Shweta Gulati (Mar 15, 2017 7:25 p.m.)
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What is the rotational symmetry of a parallelogram?

Posted by Iniya Jeyaganesh (Mar 15, 2017 7:17 p.m.) (Question ID: 3855)

  • Answers:
  • Diagonally opposite angles are equal. Opposite sides are of equal length. Opposite sides are parallel. The diagonals bisect each other. It has no lines of symmetry. Order of rotational symmetry: 2.

    <h2> </h2>
    Answered by Shweta Gulati (Mar 15, 2017 7:32 p.m.)
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what is the area of an equilateral triangle

Posted by suadd43 suadd43 (Mar 15, 2017 6:51 p.m.) (Question ID: 3854)

  • Answers:
  • Ans.

    Area of Equilateral Triangle : {tex} {\sqrt 3a^2\over 4}{/tex}

    Where a is side of Triangle.

    Answered by Naveen Sharma (Mar 15, 2017 7:01 p.m.)
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Public opinion is subject to                             A change over a period of time.                     B no change over a period of time               C neither A nor B

 

Posted by Tarwinder Singh Benipal (Mar 15, 2017 1:40 p.m.) (Question ID: 3839)

find the missing value 

area of triangle = 87cm 

base = 15cm 

height =?

Posted by Deepak Yadav (Mar 14, 2017 9:52 p.m.) (Question ID: 3805)

  • Answers:
  • 1/2 *base *height = area

    1/2*15*height= 87

    height=1/15*2*87=11.6

    Answered by Chandan Yadav (Mar 14, 2017 10:01 p.m.)
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  • Ans. Area of triangle = 87cm2

    base = 15 cm

    Height = ?

    We know,

    {tex}Area \space of \space triangle = {1\over 2}\times base\times height {/tex}

    => {tex}87 = {1\over 2}\times 15\times Height {/tex}

    {tex}=> Height = {1\over 15}\times 2\times 87 {/tex}=11.6cm

     

     

     

     

    Answered by Naveen Sharma (Mar 14, 2017 10 p.m.)
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which type of mirror is used in reflector of torches?

Posted by Anshul Dhawan (Mar 14, 2017 6:58 p.m.) (Question ID: 3780)

  • Thanks.

    Posted by Anshul Dhawan (Mar 14, 2017 10:01 p.m.)
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  • Answers:
  • Concave mirror

    Answered by Anupma Kumari (Mar 14, 2017 8:25 p.m.)
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Sketch the cross section of soil and label the various layers and Make a sketch showing groundwater and water table. Label it also

Posted by Komal Garg (Mar 14, 2017 6:44 p.m.) (Question ID: 3779)

Is transpiration harmful for plants? True or false? And why?

Posted by Anshul Dhawan (Mar 14, 2017 6 p.m.) (Question ID: 3777)

  • So, why It is called nessecary evil

    Posted by Anshul Dhawan (Mar 14, 2017 10:03 p.m.)
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  • Answers:
  • Transpiration removes extra water from plants through water vapour. It also creates a sunction pull which helps to lift up water from the soil to the xylem of plants. 

    Answered by Rohini Banerjee (Mar 17, 2017 10:03 p.m.)
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  • No, transpiration is not harmful to plants because it is the process by which excess amount of water is sending out in the form of vapour...

    Answered by Sandeep Reddy (Mar 14, 2017 6:43 p.m.)
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Explain how groundwater is recharged?

Posted by Komal Garg (Mar 13, 2017 2:46 p.m.) (Question ID: 3681)

  • Answers:
  • Ans. Rain water and the water from water bodies on earth’s surface pass through the soil by the process of infiltration. The infiltrated water then gets accumulated in the aquifer deep under the ground. There are some layers of impermeable rocks which prevent the water in the aquifer from seeping down further. In this way, the ground water is recharged.

    Answered by Naveen Sharma (Mar 13, 2017 3:29 p.m.)
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Science is scientific

Posted by Pankaj Jain (Mar 12, 2017 6:11 p.m.) (Question ID: 3629)

What is meant by If-Clause?

Posted by Iniya Jeyaganesh (Mar 12, 2017 12:55 p.m.) (Question ID: 3617)

How is river Yamuna called when it enters Pakistan?

Posted by Iniya Jeyaganesh (Mar 12, 2017 12:54 p.m.) (Question ID: 3616)

Determin the value of x

      {[3]3}=37x

Posted by Iniya Jeyaganesh (Mar 12, 2017 11:23 a.m.) (Question ID: 3609)

  • Answers:
  • {tex}{\left\{ {{{\left( 3 \right)}^3}} \right\}^7} = {3^{7x}}{/tex}

    {tex}{3^{21}} = {3^{7x}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \left[ {{\mkern 1mu} {{\left( {{a^m}} \right)}^n} = {a^{mn}}} \right]{/tex}

    {tex}7x = 21{/tex}

    {tex}x = {{21} \over 7}{/tex}

    {tex}x = 3{/tex}

    Answered by Neeraj Sharma (Mar 12, 2017 12:17 p.m.)
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Simplify the following expression and find it's value when p=3 and q=2

            -3[pq+p2]+4pq-2p2+q-2

Posted by Iniya Jeyaganesh (Mar 12, 2017 11:16 a.m.) (Question ID: 3608)

  • Answers:
  • {tex} - 3\left[ {pq + {p^2}} \right] + 4pq - 2{p^2} + q - 2{/tex}

    {tex}on{\rm{ }}\,putting\,{\rm{ }}p = 3{\rm{ }}\,and{\rm{ }}\,q = 2{/tex}

    {tex}={\rm{ - 3}}\left[ {3 \times 2 + {{\left( 3 \right)}^2}} \right] + 4 \times 3 \times 2 - 2 \times {\left( 3 \right)^2} + 2 - 2{/tex}

    {tex} = - 3\left[ {6 + 9} \right] + 24 - 18{/tex}

    {tex} = - 45 + 6{/tex}

    {tex} = - 39{/tex}

    Answered by Neeraj Sharma (Mar 12, 2017 12:25 p.m.)
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Simplify the following expression and find it's value when x=3

          -17x-12x2+15x-19x4+13x4-3x2

Posted by Iniya Jeyaganesh (Mar 12, 2017 11:14 a.m.) (Question ID: 3607)

  • Answers:
  • {tex} - 17x - 12{x^2} + 15x - 19{x^4} + 13{x^4} - 3{x^2}{/tex}

    {tex}c{\mathop{\rm lub}} \,the\,like\,terms{/tex}

    {tex} = - 17x + 15x - 12{x^2} - 3{x^2} - 19{x^4} + 13{x^4}{/tex}

    {tex} = - 2x - 15{x^2} - 6{x^4}{/tex}

    {tex}on\,putting\,x = 3{/tex}

    {tex}= - 2\left( 3 \right) - 15{\left( 3 \right)^2} - 6{\left( 3 \right)^4}{/tex}

    {tex} = - 6 - 15 \times 9 - 6 \times 81{/tex}

    {tex} = - 6 - 135 - 481{/tex}

    {tex} = - 627{/tex}

    Answered by Neeraj Sharma (Mar 12, 2017 12:36 p.m.)
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Simplify the following experssion -2[a2+ab]+3+ab and find it's value when a=2 and b=3

Posted by Iniya Jeyaganesh (Mar 12, 2017 11:10 a.m.) (Question ID: 3606)

  • Answers:
  • {tex} - 2\left[ {{a^2} + ab} \right] + 3 + ab{/tex}

    {tex}on\,putting\,a = 2\,and\,b = 3{/tex}

    {tex} = - 2\left[ {{{\left( 2 \right)}^2} + 2 \times 3} \right] + 3 + 2 \times 3{/tex}

    {tex} = - 2\left[ {4 + 6} \right] + 3 + 6{/tex}

    {tex} = - 2 \times 10 + 9{/tex}

    {tex} = - 20 + 9{/tex}

    {tex} = - 11{/tex}

    Answered by Neeraj Sharma (Mar 12, 2017 12:41 p.m.)
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