# SC2Player

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1. ## Relationship between water pressure and velocity

Glad to be of service. I think I actually have the same physics textbook - it looks like Introduction to Physics by Cutnell and Johnson. It's a pretty helpful one (has more depth than the Oxford textbook, and is also significantly more rigorous).
2. ## Relationship between water pressure and velocity

Check out this link http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html It provides an alternative definition for the Bernoulli equation, although you'd need to know both initial and final equations. There's also the continuity equation, although yet again you'd need to know both initial and final values. If you don't know both the initial or final velocity of the water, I'm afraid I can't help much.
3. ## Relationship between water pressure and velocity

Have you looked at Bernoulli's equation for fluid dynamics? It provides a relationship between pressure and velocity (amongst a few other variables), and is currently in the engineering option.
4. ## A (not so humble) enquiry (seriously, I need help)

You could link chaos theory as a whole to TOK, which could help with personal engagement and reflection. From what little I do know about chaos theory, I would say that the double-pendulum system on wikipedia would be a good place to start (it's calculus-related). Weather systems and fluid dynamics may also be related to chaos theory. However, you'd probably need a decent grasp of physics for these subjects. It's a big field, so I would like to emphasize kw0573's advice on choosing a narrower, more specific topic.
5. ## What is your hardest and easiest subject?

Easiest: Probably Math HL - I did a fair bit of math before starting IB Hardest: Chinese B SL - I just find it really hard to be properly motivated for this language due to the work needed in memorizing all the characters.
6. ## Choosing between HL Maths and HL Physics

I'm doing both HL Physics and Maths, and it seems that the gap between SL and HL for both is quite significant. Physics SL mostly revolves around simple substitution problems and concepts in physics, while HL teaches significantly more complex concepts and ideas, and involves more memorisation overall. However, the most math you'll need to do is algebraic manipulation, with a few log questions thrown in here and there, so do not worry about math in Physics (it's effectively based off Math Studies, maybe slightly lower). I actually don't know much about Maths SL, but if you want to do well in HL, it'd probably be significantly easier if you understood the entire SL syllabus beforehand (understanding some of the HL too would not hurt). Apparently the gap between SL and HL is more significant for Maths from what I've heard. I suggest you take a look at the syllabus for both topics, as well as the formula booklets, to compare what you already know to what you'll need to learn (all this can be found via Google). Don't fret if you don't understand most of the topics - this is what you'll be learning, not what you need to know.
7. ## Math Exploration Difficulty Level

I'm trying to figure out an appropriate difficulty level for my math exploration (i.e. what can be assumed knowledge). I know that anything in the HL core is fine, but will I need to define ideas from the option/further math topics, especially if my math HL class isn't doing that option (We're only doing the calculus option in class)? The IB just took out the matrices section from the core, and I really don't want to define what a matrix is again... Same goes for stuff like bijective functions, homomorphisms, and basic set theory (or anything in the options besides the calculus one). If it helps, my topic is on the relationship between complex numbers and 2x2 matrices.
8. ## Physics IA Length

Thanks for your tips - I'll probably use them for my EE as well.
9. ## Physics IA Length

i've just submitted my Physics IA, and I've realised that it's a little bit longer than an EE (still under the 12 page limit somehow). I might've went somewhat overboard on the explanation of my results... So, just wondering, does anyone know if this will affect my marks significantly? I'm somewhat worried about the teachers/examiners getting annoyed about the length.
10. ## Math HL percentage grade

It sort of depends on which option you're doing. Check this link for the 2014 grade boundaries, and scroll down to math HL: http://www.dpcdsb.org/NR/rdonlyres/257D5ECC-B156-4400-B0C7-D765BB3D4855/140115/201405_Grade_Boundaries.pdf (the boundaries don't really change too much over the years). However, it should be noted that the math HL test might be easier this year (you have more time per mark on the exam). Also, the percentages you get on Pamoja may not necessarily translate directly to IB percentages. Either way, I'd suggest that you aim for a higher percentage than the boundary marks to safely get into your desired grade.
11. ## Chemistry Options

What IB'ez suggested is a really good idea - I'm currently doing my EE in Chemistry, and so far it's been pretty rewarding (although it is difficult). In terms of the time it takes to learn an option, it really depends on how fast you learn it yourself. If you're good enough, then you probably won't need to spend anywhere near the amount of time recommended by the IB. I suggest you don't limit yourself to the textbook or IB course if you want more rigorous coverage. I'm no chemistry expert, but I have gone through a few resources on organic chemistry that were quite interesting: Organic Chemistry: An Intermediate Text, by Robert V. Hoffman (goes through organic chemistry reactions in more detail) The Logic of Chemical Synthesis, by E.J. Corey and Xue-Min Cheng (provides a lot of examples of various synthetic pathways; somewhat outdated, but might still be worth a look) http://www.masterorganicchemistry.com/blog/?_ga=1.124768074.132446873.1467341921 (provides lucid explanations of most concepts and reactions in organic chemistry) http://www.organic-chemistry.org/ (just a site for org chem stuff - has lots of synthesis pathways and information overall)
12. ## Extended Essay Ideas

Search Google for math or physics IA ideas - most of them can be extended further for a math EE, and may serve as good starting points. You could also take a look at some more obscure unsolved problems in both subjects, or explore some topics outside of the syllabus.
13. ## how do I include more math in this topic

Maybe you could attempt to generalize your results to other situations, or attempt to make it more abstract. For example, you could investigate the rate of flow of water from a tank (take a look at Torricelli's law, or fluid dynamics in general). Just remember to focus on the math, though.
14. ## IB courses you wish you could have taken, but couldn't

Really wish I could've taken a third science (Bio), or ancient Greek (always wanted to read Homer in the original language), or Latin (same for Virgil's Aeneid), or music, or computer science... I suppose I can just learn that stuff on my own in the future.
15. ## Would Math, Chem and Physics HL be manageable?

Further maths is kinda disappointing tbh - I was expecting a more rigorous course, something along the lines of uni level maths. I think it would've been better to focus more on one specific option in more depth.