Explain E=mc^2?

7 Answers

  • 4 months ago

    During a fission nuclear reaction, nucleus of a radioactive substance splits into two less reactive substances. One example is the fission of Uranium. The products can be Zenon and Barium and a very large of energy. We know the mass of one mole of each of these elements. An amazing discovery is that the sum of the mass of the Xenon and the Barium is less than the mass of the Uranium. The equation below determines the relationship between the decease of the mass and the amount of energy that produced

    E = m * c^2

    The decease of the stability of the nucleus is directly proportional to the decrease of the mass of the nucleus. A similar thing happens during a chemical reaction. When methane is burned, the products are carbon dioxide and water. Carbon dioxide and water are more stable than methane. The result is that a lot of heat energy is produced. I hope this is helpful for you.

  • goring
    Lv 6
    4 months ago

    Its a structural energy equation which represented the energy of a number of light particle moving at the speed of light with a particular amount of power equal to P=MC^3 / diameter of the particle, M is the mass of each particle, P is the Power that gives motion to the light particle ,C is the speed of light as measured relative to the earth.

  • poldi2
    Lv 7
    4 months ago

    It basically means that a tiny bit of mass (matter) is equivalent to a lot of energy.

    Mass is essentially a very concentrated form of energy.

    Think atomic bombs.

  • 4 months ago

    Let's suppose I tell you this room is 100 square feet. Pierre, from France, tells you this room is 9.2903 square metres because he uses the metric system. We're both measuring the same physical quantity, the area of the room, but we are just using different units to do it.

    We used to think of two separate physical quantites ... one we called energy which we measured with joules or ft.lbs or erg or whatever, and the other we called mass which we measured with kilograms or pounds or whatever.

    What Einstein showed was that mass and energy were not two separate things but were one quantity, like area, that we'd been measuring with different units. This quantity we'd call energy if we used energy units to measure it, or mass if we used mass units.

    So now there is a physical quantity we call mass-energy. We can use joules or kilograms, ft.lbs or pounds to measure it but it's all the one thing. But just as there is a conversion factor to shift from square feet to square metres, we needed a conversion factor from units of mass to units of energy. That factor is c^2. Mass and energy are the same thing in different units and E = mc^2 is the conversion between those units.

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  • 4 months ago

    Energy (in joules) = mass (in kilograms) times 8.988 x 10^16 joules/ kg.

    8.988 x10^16 happens to be equal to c^2.

  • BJJ
    Lv 7
    4 months ago

    Energy = Mass x speed of light x speed of light

  • 4 months ago

    E = energy (measured in joules, J)

    m = mass (measured in kilograms, kg)

    c = the speed of light (measured in metres per second), but this needs to be "squared"

    It shows you get a huge amount of energy out of a small mass.

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