関連ワード:  power is a scalar or vector quantity    is power a scalar or vector quantity explain    is power a scalar or vector quantity and which are the correct units for measuring it    energy is a scalar or vector quantity    electricity is a scalar or vector quantity    electric power is a scalar or vector quantity    is energy a scalar or vector quantity explain    kinetic energy is a scalar or vector quantity    potential energy is a scalar or vector quantity    surface energy is a scalar or vector quantity