You'll certainly not have difficulty in physics and engineering BECAUSE you are good at math or economics; math, especially, is important in physics.
No, where do you get such weird ideas? You NEED math for physics and engineering!
No
Not so sure about economics but you will need physics.
Yes.
I'm good at Math and I passed Chemistry.
Of course, there isn't a reason not to, because mathematics is the language of economics, science and engineering(with the exception of computer programming).
Sounds backwards to me.
Because the majority of economics, physics and engineering and general chemistry requires you to be able to calculate, not just learning concepts.
Engineering(except software and electrical) Accounting Economics Mathematics Physics Chemistry
It's absurd to draw such a general correlation.
Not necessarily but you will be expected to understand computing - as a tool for aiding complex calculations, not an end in itself. You are right about the maths, but economics? Engineering is the practical application of science, principally physics but also chemistry.
No. It is an absurd falsehood, to which no credence should be paid.