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    Physics

    Chima Sunday (Tutor)
    31-05-2016 16:33:00 +0000

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    1 17 0

  • Jennifer Sparkle

    what score those an intending medical student is expected to get in jamb?

    0 31-05-2016 16:40:00 +0000

  • shadrach joy

    wat is d cut off mark for medice nd nursing in unimaid

    0 31-05-2016 19:41:00 +0000

  • Obini Emeke

    200 or 180 depending on the choice of institution

    0 31-05-2016 19:45:00 +0000

  • Saved Emmanuel

    pls when will Uniuyo's post utme commence????

    0 01-06-2016 07:47:00 +0000

  • Majiri E

    pls help out... I need the workings to this question? An object weights 100N on the earth's surface .find its weight at a point P with orbital radius 2R (g=10Nkg-1) A 40N B 35N C 25N D 20N

    1 01-06-2016 09:58:00 +0000

  • Chima Sunday (Tutor)

    Simple Solution
    W = mg
    So our work is to use the information given to find the mass and acceleration due to gravity at that point and then multiply them.
    To start with
    F = W = GMm/R2 (Newton gravitational force)
    On the earth surface with radius R, W = 100N
    Then 100 = GMm/R2
    by subject formular m = 100R2/GM ...........(1)
    Equation (1) is the mass of the object
    For g at that orbital radius of 2R
    F = W = mg = GMm/4R2
    by subject formular, g = GM/4R2 ..........(2)
    note that m cancelled each other
    Now that we have our m and g, we can go ahead and multiply to obtain
    W = m * g = 100R2/GM * GM/4R2 = 100/4 = 25N
    Answer is Option C

    2 01-06-2016 12:36:00 +0000

  • Emmanuella Amarachi

    A glass of initial volume 2×10^4cm^3 is heated from 20^0C to 50^0C.If the linear expansity of glass is 9×10^-6k^-1,the volume of the bottle at 50^0C is (a)20016.2Cm^3 (b)20005.4cm^3 (c)20008.1cm^3(d)20013.5cm^3

    0 09-06-2016 22:26:00 +0000

  • Emmanuella Amarachi

    A glass of initial volume 2×10^4cm^3 is heated from 20^0C to 50^0C.If the linear expansity of glass is 9×10^-6k^-1,the volume of the bottle at 50^0C is (a)20016.2Cm^3 (b)20005.4cm^3 (c)20008.1cm^3(d)20013.5cm^3

    0 09-06-2016 22:28:00 +0000

  • Emmanuella Amarachi

    A glass of initial volume 2×10^4cm^3 is heated from 20^0C to 50^0C.If the linear expansity of glass is 9×10^-6k^-1,the volume of the bottle at 50^0C is (a)20016.2Cm^3 (b)20005.4cm^3 (c)20008.1cm^3(d)20013.5cm^3

    0 09-06-2016 22:29:00 +0000

  • Emmanuella Amarachi

    please I need answer friends pls

    0 09-06-2016 22:30:00 +0000