Each of these subjects is heavily mathematics based. Science and math correlate directly, because science uses equations to generate facts and true statements, which are then analyzed. A strong math background is very important to all fields, especially science.
Mathematics and physics are both required for computer science and computer engineering degrees; chemistry might not be, depending upon your individual school.
Yes.
Accounting, Engineering(except computer engineering, software engineering and electrical engineering), Physics, Chemistry, etc
nothing and everything
There is no need to expertise in Physics for a computer engineering student.
Not necessarily.
Apparently, you haven't had much exposure to Physics, Chemistry, or Engineering, have you. Yes, they all do. In increasing order of mathematical intensity, they are Chemistry Engineering Physics
yes
computer science engineering
For Physics and Engineering yes, but not so much for Chemistry.
No. You can still excel or do well in physics even if you are not good at computer science and chemistry. For example, physics is one of my favorite subjects, and I am pretty good at it. I am also good in math, but have never done anything computer science-related. I dislike chemistry, but love physics. I do not know much about the engineering aspect though, sorry. I'm sure you'd be fine though.
That depends on the individual