# yghydumdam

Members

18

1 Unknown

• Gender
Male
• Exams
May 2013
• Country
Poland
1. ## What should I write? GDC

Hello, I've got a question concerning paper 2. The point is that I don't know what I am actually supposed to write while using GDC. 1. whenever I use GDC and write the outcome (or graph or whatever) in the paper, am I supposed to write something like "from GDC" or is it unnecessary? My teacher always told us to write it but I didn't notice any similar comments in marks schemes. 2. One thing is that I don't want to waste time but the other - I don't know what is the minimum I should write to achieve a point, for instance: let there be a binomial distribution X~Bin(7,0.25) when I am supposed to find P(X=<2), should I elaborate that this is equal to P(X=0)+P(X=1)+P(X=2) and next, it is equal to: 7C0*(1/4)^0*(3/4)^7 + 7C1... et cetera... and then finally, the outcome from GDC what do you think is enough to get a point?
2. ## Paper 2 Tips

As far as formal letter is concerned: are we supposed to write (top of the page) all these data conerning addresee (his name, address, etc.) and date? Or should we begin with the content with "Dear Sir..."?
3. ## Ab Initio AB initio WA

Hello, I've got WA (German Ab initio) tomorrow and wonder whether I can write in "Reflection" heading (question about a person from the target culture) the difference which was not mentioned previously in "Comparison" or not. What do you think about it?
4. ## Lab Report Percentage uncertainties and decimal places

Hello. My problem is: I put the percentage uncertainty of a given value in the column. Of course, rounded it to 1 sf. The point is that for a given data set it is 0.7 %, for another 0.03 % (for instance). I don't know what I should do as I have to posses the same number of decimal places in one column. Do you have any idea? generally: is it also necessary to keep the same amount of decimal places in one column when talking about percentage uncertainties?
5. ## Lab Report Lab report - variables question?

Ok. I know it but notice that RQ should include dependent variable and it includes luminance. On the other hand, I do not measure it 'directly' but I check how resistance responds to change in the distance and then, converse it to obtain luminance. In other words: my raw data table does not include the same variables which are in my RQ. Thus, I don't know how I should specify it.
6. ## Lab Report Lab report - variables question?

Hello. I've got question concerning appropriate notation of variables. Namely: I investiage photometric law of distance (inverse square law of light) and my RQ is: "How is the luminance of the light-sensitive area of the photoresistor dependent on the distance of photoresistor and source of light?”. The point is that to indicate how the luminance change, I measure resistance and iverse it, due to inverse proportionality of luminance and resistance. Hence, my unit for a luminance is not lux (as in the theory) but Ohm to the power of (-1). The question is: what is my dependent variable? From RQ, it is luminance. But I actually measure a resistance to get the relationship from RQ. So: where should I put both these values - luminance and resistance? Thanks in advance.
7. ## Citation and Referencing

Ok, thank you. I've got one more question. Namely: do I have to cite a platitude? Let me provide a theoretical example: "It is repeated over and over again (or - it is well known) that the Beatles are the most influential/the greatest band in the history". My supervisor suggested that I should refer to it in my essay but it's a kind of constantly repeated cliche so I don't see such a need to do it. What do you think about it?
8. ## Citation and Referencing

Hello. How should I refer to a given appendix in the text? Shold I write for instance (Appendix A)? Or should it be rather like (Appendix A, some title)? I've decided to use Harvard Referencing System and can't get the information about this case. Thank you in advice.
9. ## Lab report - straight trend line

Hello everyone. I've got a question concerning Lab report. The situation is that I received 6 points from Design aspect. Thus, the theory, assumptions, etc. were correct. It was mainly about standing waves but I thik that's not the clue. The point is that I get 5 points from DCP aspect due to the fact that my line of best-fit was done wrongly (according to my teacher's view). Namely: I assumed (design) that if I put certain variables on axis (according to the theory of standing waves), trend line should be straight. That is why I drew it straight but unfortunately, it didn't pass through any error bar. The real pattern of points was rather kind of polynomial. And here goes my question: what should I do? What I thought is that I should leave the straight line as it was and then, evaluate the failure in CE aspect, give reasons, etc. My teacher thinks in a pretty different way. I would appreciate your opinion/knowledge concerning this problem. Thanks in advance.
10. ## IA (HL) Filling up the Petrol Tank

Hello. I've got a general question: does bullet points suppose to be elaborated in order provided in the task or can I mix them? And now rather more specific one but directly connected with the previous one: what is your opinion on the meaning of "the better deal". Because what I figured out is comparison of two options for a given motorist, claiming whether he gained or lost and comparing the outcome to the other motorist. The higher gain/the lower loss = better deal. But this is how I understand the method of effective litres so I certainly misunderstood something.
11. ## Math HL vs Chem HL vs Physics HL

The hardest one is Math HL - it requiers the biggest amount of time. But I would say it's the best one, at the same time.
12. ## Sound emitted by the glass

Hello. I've got a question which is connected with my physics design - hitting the glass with a hammer and checking the frequency of the sound. The independent variable is amount of water inside the glass. How would you describe the theory of physics as far as this investigation is concerned? Of course, I don't want the whole specific answer, rather some tips because I don't know actually how to start with it. Of course mentioning the theory of sound frequency, etc. that is obvious. But I don't know hot to put the reason why the sound is emitted by hitting the glass. I will appreciate any answers. And I've got one more trouble. I don't know actually whether the frequency of the sound is dependent on the mass of water only or on the ratio mass of water/mass of the glass or maybe mass of water+mass of the glass or the ratio: volume of the water/total volume of the glass? I have no idea. Would you mind helping me? I can't even find any reliable source. EDIT (merged by Gaby) Ok, I found the answer on some part of my question. It's all about standing waves, so the frequency depends only on the height of the water column or rather air column. It doesn't have any connection with mass of water. But now, I've got some more questions: If this standing wave is created by two waves of the same frequency, etc. so the second wave is the first wave reflected. The question is : where does it have its beginning? Is it where the water column ends (air columns starts) or where the glass ends and it goes down towards the water surface? The opther trouble concerns the shape. Is is important that the shape of the glass is not regular? I mean the walls are not parallel, is it different case? Please, help me.
13. ## The Beatles - English B

And is it recommended to show counter arguments of a certain topic (as in the case of TOK)?
14. ## The Beatles - English B

I am sure that it fits the english b subjects, to precise: category 2: culture and society (essays of a sociocultural nature with an impact on the language). I am aware of the fact that it is not specific, sophisticated topic but in this case I don't follow the idea of deep investigation as far as the extended essay is concerned. The only thing I would like is to write it and not to fail (not very ambitious but pragmatic).
15. ## The Beatles - English B

Well, I did not wanted to focus on music itself, just saying about breaking the moulds of the formal structure of the music and inspiration for the present artists (all in all, it's not the music topic) but I would rather focus on the impact on politics, on feminization aspect, looks, etc.
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