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How many wavelengths can we see in the laser spectrum and why? I thought it would have just one but then there's multiple wavelengths of the colours that's used, so if someone could help explain that would be appreciated. Does a laser have just one wavelength or mulitple wavelengths?

i bet smo has already asked this at some stage but does anyone know if unsw's cs is better than usyd? i heard a usyd cs student say go unsw ... also i wanted to do a double with comp sci and something else (not sure yet, so if anyone has suggestions)

is anyone going to EDEN's concert in syd? i was interested in going but no one i know listens to him, so now I'm just curious if anyone else listens to him :D

Basically the title. My teacher’s notes say that if you test it with litmus paper it should stay red meaning it’s acidic. Wouldn’t the Cl and Br ions be basic since they’re conjugate bases of HCl and HBr which are strong acids?

mechanics is really doing my head in How do you know when to integrate the given form in question and the general form? For example, in the questions below, one of them they integrate the given acceleration, and in the other one they don't integrate the given acceleration, which is a=-16x...

i can't seem to get better at mx2 (and mx1 but its slightly better) and also miraculously seem to be getting worse (averaging a solid 70-80ish rank out of almost 90). uh i do tutoring so i understand when the tutor explains it but can't do it on my own. oh and i can't drop it bc im on 10 units...

anyone have good not super pricey laptop suggestions that'll last me for this final year and into uni? - would like it to be touch screen, and foldable (not an ipad.) - currently using a HP and their battery life is bad imo, but idk if that's the issue with all of them - probably not going into...

When an object in UCM at the top of the circular motion, why is Ftension= Fc -Fg if both Fc and Fg act downwards - Fc acts towards the centre and Fg is down And then when it’s at the bottom, it’s Ft= Fc+ |Fg|?? Why is that? i also don’t get tension in physics … i thought it would’ve been...

my teacher at school doenst teach the content he goes on abt almost the same stuff each lesson somehow we're supposed to be literary mindscapes/ worlds , i have no idea if they're the same thing nor not. BUT the teacher hasn't even uttered those words since the course started i.e. last year...

Hi, I'm stuck on this question and would like help. Thanks if anyone can explain.

so here's the deal i'm about to drop a language but once i drop that language there's no going back on physics. and sometimes i think i'm pretty good at physics, then some of the time (like most of the time) i think i'm pretty useless at physics; blanking out at questions and having absolutely...

hey can someone help me out in sketching y=x^4-8x^2+11 and y=3x^3-x+2 for the first one i tried finding a factor first to long divide which didn't work and then tried using a sub but also couldn't get the intercepts. and second one i got 3 intercepts through long division when there's only...

hey if anyone could help me out with this question that'd be great. and if anyone has perms and combs tips because i absolutely cannot do it. thanks and i think this question is from SGS 2019 (probably prelims) but no solution lol.

2021 year 12s have been asking if I want to purchase the following 2 UKCAT books, yes UKCAT not UCAT, and I'm wondering if I should purchase it or buy one that specifies 'UCAT' i.e. is there any different between the 2 such that I shouldn't use UKCAT resources? And does anyone know if the...

Due to lockdown, I have been taking class notes digitally for all my subjects but prior to lockdown i have been doing a mix of both handwritten and digital which is not effective. I've decided to just stick to one, well try. I'm leaning towards digital but I have seen a few threads where...

Hii, I have like 3 unit options. I feel like the first option is safest since there're 11 units however it also means one 'extra' subject. I'm not great at physics (above average in my school but not in the high percentage), but its a necessity for some courses in uni. Jap is more of a leisure...

Hey, so it's about to be summer holidays and I'm looking for a part time or even a summer job. But I haven't found many places which fit what I am looking for (not looking for fast food chain locations). I know this may sound quite annoying since there's so many jobs out there but yeah. I have...

Through Nick’s romanticised/subjective/idolised narration which he ironically expresses is ‘inclined to reserve all judgments’, the unethical and careless character/behaviour of Gatsby is highlighted to the readers when they read closer/deeper into Gatsby’s character and background. Gatsby was...