# Melissi

Members

36

10 Good

## Profile Information

• Gender
Female
• Exams
May 2014
• Country
United Kingdom
1. ## May 2014 GDC use in the exam....

Hi! I was just wondering, if I use my calculator to integrate something for example, what exactly should I write to make sure I get the marks? Do I just need to state "from GDC"? That seems way too easy for a 6 mark question. Though I suppose knowing what to integrate is part of it... Thank you! I just want to make sure I'm not dropping easy marks, I think I'll need every mark I can get

3. ## Probability question help? (Core!)

No, that completely makes sense, thank you! That's actually how I did part (a) as well, but I was thinking since there are 8 of them, the first probability was going to be 1/8... But now I definitely see how your method is right! :') Thanks again! And thanks to Negotiation too
4. ## Probability question help? (Core!)

Hi everyone! I've been doing some probability revision and I stumbled across this one question which I just can't figure out. I've tried it multiple ways but I keep getting the same answer, which would be good, if only that answer was the same as the answer in the book. I thought it might be a mistake on the book's part, our answers are quite similar for part (b), but I'm no where near for part (a). The answers just say "Did you consider finding the complement?" which is a bit annoying because that's what I did. Anyway, I was hoping if someone could please have a look at this question? Thank you!
5. ## IA IA History help!

Hi! The way we got told to think when forming our questions was to always consider the historical significance of the event in question. So maybe instead of "to what extent" you could say something like "how significant was the Watergate Scandal in the impeachment of Nixon?" because this will give you more room for analysis and also more opportunities to consider historical significance and the context of events. Context is apparently really good to include! Hope this helps in chosing your question!
6. ## When are complex ions formed?

Complex ions are formed when metal ions are added to water, I believe! (Or any other ligand, such as ammonia.) Since Si is a metal, as you can see from the periodic table, we can see that it'll form a complex ion. If you're unsure of which elements are metals (I was, oops!) a quick google search will find some good pictures. Actually, Si is a bit funny because a lot of the stuff I found says it's a metalloid, rather than a metal - but I guess that must be enough for complex ion formation? Hope this helps a bit!
7. ## Really Quick Question...

where did u get this question? In the "Mathematics Higher Level for the IB Diploma" textbook, by Fannon, Kadelburg, Woolley and Ward - I was working through the chapter on further trigonometry and they used it to prove some sort of identity, I can't remember which!
8. ## Complex number forms

Ah, thank you! That's what I thought, but for some reason the mark scheme for the paper I was doing had them the other way around. Oops!
9. ## Complex number forms

Hi again everyone! While doing an exam question this morning I got a bit confused regarding the different ways of expressing complex numbers, and I've found different answers when I tried to look it up, so I was hoping someone could help me out! When writing complex numbers in modulus-argument form, is that rcis(theta) or in the exponential form? I've seen a couple of different answers so I'm not actually sure which form I should be using... Thanks!
10. ## Really Quick Question...

Oh. Thanks so much! :'D I thought it was going to be an easy answer but I was having such a mental block... Oops? :')
11. ## Really Quick Question...

Okay, I might be completely stupid for asking this, but I'm having a blank. Could anyone explain the following point to me: squareroot(m^2) = |m| Please? m is just any real number, it doesn't specify whether it's positive or negative, and since (-m)^2 is the same as m^2 I'm a bit confused. A minor detail, I know, and I feel a bit silly for asking, but it would really help me understand this proof I'm doing if someone could help me out! Thanks!
12. ## Question about the syllabus!

Hi everyone! This may be a totally stupid question, and I think I already know the answer to it. BUT I thought it would be best to check: obviously the syllabus for 2014 is already a couple of years old, and some of the information is a bit out of date. In such instances, I'm supposed to follow the mark scheme to gain marks instead of what is now accepted as the correct knowledge, right? It seems obvious to go with the mark scheme on this one, but a large part of me feels very wrong at writing what I know is false information on my exam papers, should this come up, so I wanted some backup on this one! Thank you!
13. ## IA Writing a good Historical Investigation

Hello again! I was just wondering if someone might be able to help me with section F, the bibliography. I've used Harvard referencing in the IA, so do I need a reference list AND a bibliography? This is the first time I've had to Harvard reference and the internet seems to think I don't need a bibliography, just a list of sources, so does this still count for section F? Thanks in advance!
14. ## What should I do for the Creativity part of CAS?

Hi! For creativity you could do things like learn to play a musical instrument (or just practice regularly if you already can play one!) or creative writing/sketching/painting/etc. For evidence you could submit photos or some samples of your art! For my creativity I learned how to bake, so I had people take loads of photos of me baking, as well as the finished product. Which was very nice, because as well as CAS hours I got loads of cake Basically, the way we were told is that for creativity you can do anything where you actually make something - art, jewellery, food, clothes, whatever. But it's best to choose something that you think is really fun as well
15. ## SL Cold War notes?

Hi everyone! We've just started our last topic, The Cold War, only it now turns out that our new teacher isn't helping us much with this at all. So far she claims that we've covered the origins of the Cold War, but the entire class is completely at a loss as to what happened! So, I was wondering if anyone has any notes they may be able to send me? They could be regarding the origins or just the Cold War in general. Or, if you would be able to explain some of the causes to me, that would be massively appreciated! Thank you very much!
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