Might I just add this is a verry deadly combination of subjects. Not trying to scare you but I did this exact combo in T1 except ENG was replaced with COMP.
I was worked to exhaustion with the amount of work I had every week. It was the most stressful term I've ever had so make sure you're prepared for it because it's going to be REALLY hectic. Hopefully ENG doesn't give as much work as COMP!
Of course you might cope with it better than I did and all the best of luck to you =)
Mod Edit: Merged posts
It's a significantly demanding combination but engineering students have relatively little choice. (Nor do I suspect you would have in your double degree either.)
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Recommendation might be to swap out either ENGG1000 OR PHYS1121, but not both, for something else. Ideally ENGG1000 I think, because I don't believe it's a prerequisite for anything. But I wouldn't full on push for it purely because I wouldn't know what to switch it out for.
Here's my input on taking the ENGG1000/PHYS1121/MATH1131 combination since I took these courses in T1. Is it gonna be hard? Hell yeah. But the reality is that is uni supposed to be smooth-sailing? In my opinion, not really, because if you're not challenged then you're not really learning and letting yourself grow. But is it going to be worth it? I would think so.
I will say, ENGG1000 was a really good break from my other courses. ENGG1000 was essentially a group project with no exams - you submit logbooks, write 2 reports and build something. Plus, this was the subject I made a lot of friends (a lot of students view ENGG1000 as an opportunity to socialise lol). Personally, I would recommend taking it in T1 because, from what I heard, they're very generous in scaling your marks because they don't expect anyone's projects to work. It's also a really good introductory course to uni life in general because it's teaching you not to get too fixated on assessments if you don't perform your best in specific subjects. If you take it in T3, they tend to have higher standards with your project performance because by that time, a lot of students have refined their skills, an example being coding.
If you really wanna change your combination of subjects, it's hard for me to suggest which subject you could swap it with. Maybe ELEC1111? At the same time, I'd say ELEC1111 is very content-heavy - I'd argue it's a bit heavier than PHYS1121, in the sense that it ramps up in difficulty really fast, whereas there's a level of comfort with PHYS1121 in the sense that half of the topic is very reminiscent to HSC Physics, especially with mechanics, but looking at it in a mathematical perspective (at least, after completing the old syllabus).
Also, I just remembered that since you're doing Electrical Engineering, you are required to take PHYS1231 (Phys1B) and the requirements of taking PHYS1231 is either credit (I believe) in PHYS1121 or a pass in PHYS1131. This is something to keep in mind in, especially since they say it's a lot easier to pass PHYS1131 than credit in PHYS1121.
If you're struggling to plan out your subjects,
here's a sample degree outline for electrical engineering and comp sci. Or you can go to Student Support Services to help plan out your degree (I've personally never went to them to help plan out my degree but my friends who do double degrees go to Student Support to get some help with planning).
Hope this helps!