# eross

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• Gender
Female
• Exams
May 2016
• Country
Uruguay

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1. ## Math HL Paper 2

I did tz1 and found it much harder than a lot of the past papers I had done The goat question... i just left it blank. AND the poisson one gave me trouble too. and don't even get me started on section B...
2. ## English A Literature HL Paper 1

@merging @ShootingStar16 @Bayan N. I talked about the connections between the sounds of the machine and the music of the piano, as well as the connection/bond between the daughter and father/ student and teacher. I focused more on diction & word choice, and the use of similes and metaphors in order to represent this connection. I'm not sure if I did well though
3. ## English A Literature HL Paper 1

@JamVaun I did the TZ1 poem, but why did you call it the mask one? It was about a machinist teaching his daughter piano right? I'm scared because I finished like 25 min early...
4. ## EXAMS ARE LOOMING

1 paper done, 14 to go! Good luck everyone!
5. ## Feeling unprepared for Paper 1

Eng. Lit Paper 1 is tomorrow Anyone else feeling unprepared?
6. ## EXAMS ARE LOOMING

Well, I think the stress is at its peak now... 1 DAY anyone else freaking out right now?
7. ## Chemistry P1 energetics question

Hi! Yes, you need to calculate the change in temp in kelvin, but that's what you did wrong 20 C = 293 K and 50 C= 323 K So change in temp = 323-293 =30 K. You might have noticed that this is the same as doing 50 C-20 C; the CHANGE in temperature in Kelvin is the same as the change in temperature in Celsius (very important to remember that this only applies to change in temperatures) I hope this helped clarify your doubt

9. ## Calculation Guide?

I hope you realize this is by no means a complete list of the things you ought to know, but it should help. You need to know: how to find linear regressions from a table how to find probabilities for both the binomial and the normal distributions; also how to use the standardized normal distribution (z-distribution) how to use your graph menu; i.e be able to graph pretty much any function, but specially polynomials, exponential, and rational functions this also means finding intersections of graphs, roots, y-ints, points when you have either the x or the y value, etc. how to calculate binomial coefficients (nCr) and factorials how to find the area under a curve for defined bounds / the integral from a to b of f(x) how to find the derivative of f(x) at a point how to solve systems of equations (for sure two variables, I don't know if you need three at SL) Those are all the things I could think of, but look at your syllabus (you can find it online -- it's the 2014 onwards version) to check that you know everything. And remember, in Paper 2 USE your calculator for EVERYTHING you can. Doing the algebra in problems you can easily solve with your calculator in paper 2 is wasting valuable time, as the exam is planned assuming you will use your calculator. Good luck! and I hope this helped
10. ## Innacurrate results foir Maths IA

hi! I'm not sure I understood correctly, but if you are throwing an object (such as a ball) in freefall: when an object is freefalling, there are two forces acting on it gravity (in the downwards direction); (you might see it mention as the weight; this is mg, where m is the mass of the object and g is the acceleration due to gravity (9.8 m/s^2 )) and air resistance (in the upwards direction) --> the faster the object is falling, the more air resistance there is, until the air resistance equals gravity (but in the opposite direction). This is when the falling object reaches a constant speed, also known as the terminal speed. But BEFORE the object reaches terminal speed, the forces are unbalanced (Gravity is stronger than air resistance); by newton's first law of motion, the object is accelerating (so its velocity is CHANGING). Since the velocity of the freefalling object is changing through most of its fall, the equation distance/time does not work. It gives you an average of the velocity over the whole path of the ball, but it does not give you the instantaneous velocity at a point. Hope this helped clarify your doubt!
11. ## Calculator problems (Casio fx-9750GII

Hi! I don't know about 1) and 2) (I think they are not in the HL syllabus). Is NCD and NPD the normal distribution functions? (or are you talking about the permutations/combinations nCr and nPr?)

13. ## Confused by group 4 project

I'm not an expert on the G4 project, and I think that how you do it depends on your school (in mine we had to come up with a strategy that would benefit the environment and present it in a science-fair kind of thing). But it is a project in which you have to collaborate (usually in groups of three or four) with people from your class but who take different science courses (ideally you have one Bio/ESS, one chem, and one physics person per group). The G4 project is not graded; you get a Pass/Fail (it's an IB requirement but no grading involved). It does not get sent to the IB, but you have to write a really short (I think it was like 100 words) reflective statement explaining what you did for your project; this goes in the cover sheet of your IAs. again, I'm not an expert, so anybody reading this: feel free to correct me if I'm wrong.