Skip to content

Zone d’entraide

Question de l’élève

English
2
Retour
avatarAlligatorTurquoise1170
Secondaire 3 • 1a

Pourquoi la vitesse de la lumière est au carré dans l'équation E = mc²?

Physique
Donner une explication
avatar
avatar

{t c="richEditor.description.title"} {t c="richEditor.description.paragraphMenu"} {t c="richEditor.description.inlineMenu"} {t c="richEditor.description.embed"}

Soumettre mon explicationSoumettre mon explication

Explications (1)

  • Explication d'Alloprof

    Explication d'Alloprof

    Cette explication a été donnée par un membre de l'équipe d'Alloprof.

    Options
      avatarKylan Tteacher check
      Équipe Alloprof • 1a

      Hi AlligatorTurquoise,

      Thanks for your question!

      This is simply a matter of units! Energy (E) is measured in joules (J), which are the same as kg m^2 s^-2. Mass (m) is measured in kg and the speed of light (c) in m/s (which is the same as m s^-1).

      If you square the speed of light, you get m^2/s^2, or m^2 s^-2.

      Therefore: E = mc^2 -> J = kg m^2 s^-2 -> kg m^2 s^2 = kg m^2 s^2. The units are then all the same each side of the equation!

      You can check out this web page for further information:

      https://www.wikihow.com/Understand-E%3Dmc2

      Don't hesitate to reach out again if needed:)

      Kylan

    Québec RioTinto Desjardins Pathy TROTTIER OTHER
    Poser une question