public static float convertTensionUnitIndexToFactor(int index) {
        switch (index) {
            case 0:
                return NEWTON;
            case 1:
                return POUND_FORCE;
            case 2:
                return KILOGRAM_FORCE;
            case 3:
                return DECANEWTON;   
            default:
                return NEWTON;
        }
    }