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Algebra Algebra Algebra AlgebraAlgebra

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Euclid's Division Lemma

Fundamental Theorem of Arithmetic

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Types of Chemical Reactions

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Geography

Soil As a Resource

Soil Erosion and Conservation

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History

Age of Revolutions [1830 To 1848]

Revolutions of Liberals and Women

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Civics

Belgium And Sri Lanka

The Different Types of Power Sharing

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National Development Comparison

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Sentence Completion - Conversation

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Dialogue Completion - Introduction and Sample

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Patol Babu, Film Star

Virtually True

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Attempt questions & share knowledge

  • Light - Reflection and Refraction

    Q

    u = - 80 cm
    m = - 1/3
    -v/u = - 1/3
    v/(-80) = 1/3
    so, v = - 80/3 cm
    so, 1/v + 1/u = 1/f
    -3/80 - 1/80 = 1/f
    so, f = - 20 cm
    now, m = - 1/6
    -v/u = -1/6
    so, v = u/6
    1/v + 1/u = - 1/20
    6/u + 1/u = -1/20
    so, 7/u = - 1/20
    so, u = - 140 cm

    A
  • Shells

    Q

    It is just a convention to name the shell as K, L, M ,N.
    Well some of the reasons may be possible according to some scientists :
    Refer :

    https://education.jlab.org/qa/historyele_02.html

    A
  • Oxidation reaction and Combustion reaction

    Q

    Oxidation reaction - The reaction in which addition of oxygen to a compound/Metal or loss of electron from an atom is oxidation reaction.
    Combustion reaction - complete oxidation reaction of an organic compound into carbon dioxide and water molecule is a combustion reaction.

    A
  • alternate segment theorem

    Q

    The alternate segment theorem (also known as the tangent-chord theorem) states that in any circle, the angle between a chord and a tangent through one of the end points of the chord is equal to the angle in the alternate segment.

    A
  • Q
                                  

    Kindly post the question source.

    A
  • Light - Reflection and Refraction

    Q

    (i)
    u = - 60cm
    m = ½(convex mirror)
    -v/u = ½
    So, v = 30 cm
    1/v + 1/u = 1/f
    1/30 – 1/60 = 1/f
    So, f = 60 cm
    Now, m = 1/3
    -v/u = 1/3
    So, v = -u/3
    1/v + 1/u = 1/f
    -3/u + 1/u = 1/60
    -2/u = 1/60
    So, -u/2 = 60
    So, u = - 120 cm
    (ii) Beam will be parallel to each other

    A
  • Polynomials

    Q

    Please ask one question at a time or at least mention question number to be answered.

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  • Phrases and Clauses

    Q

    Kindly ask one question in a single post and mention that question.

    A
  • Electricity

    Q

    No change since resistivity is a material property

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  • Triangles

    Q

    A

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