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21 July, 07:03

How much mass is equivalent to 1MJ of energy? (1 MJ=1*10^6 J) (The mass energy equivalence equation and speed of light are given below.)

E=mc^2

C=3.0*10^8 m/s

A. 3.3 * 10^-3 kg

B. 1.1 * 10^-5 kg

C. 1.1 * 10^-11kg

D. 9.0*10^22kg

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  1. 21 July, 07:21
    0
    Energy - Mass equation is,

    E = mC²

    E = Energy (unit is J)

    m = Mass of the particle (Unit is kg)

    C = Speed / velocity of light (unit is m s⁻¹) = 3.0 x 10⁸ m s⁻¹

    by rearranging the equation,

    m = E / C²

    m = 1 x 10⁶ J / (3 x 10⁸) ² m² S⁻²

    m = 1.1 x 10⁻¹¹ kg

    Hence the answer is "C".
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