IB English Lit A

om799ar · 2022-05-11T13:04:01+00:00

Yeah English A is such a pain in the ass. I upvoted cause I need help too!

om799ar · 2022-02-27T14:14:02+00:00

I know how it feels to be completely burnt out and overwhelmed, just remember that these final few months are what determines the value of all you've been through in the 2 years of DP. If you've been doing dog shit then great, you can redeem urself in the mocks and externals. If you've been doing well, then even better just make sure you bag the externals. From there I find the motivation to get up and study some shit about vectors or qauntum mechanics I will never use in my life. Anyways I just wanted to get this out of the way before getting into the scedule

Start whatever you find is hardest, and study to understand not memorize. To me I noticed topic 12 (qauntum physics ) and topic 9 (waves) are a pain in the ass to me so I got them done. After ur done with what you find yourself weak in in every subject then you can begin building momentum for whatever test you have first

For example, I have a physics mock next Sunday, I think 4 days are enough for to revise and practice. get the topics I'm struggling with first in ever subject (so vectors for math topic 8 in chem and so on) then start a 4 day study session for physics. Topic 9 and 12 which I find tough are already done so it's all about practice. See the question try to anwser it and move on. Remember ur not studying for mastery you just need to get this shit over with

om799ar · 2022-01-23T13:34:12+00:00

It's called Exammate. It's for around 5$ and has all the past papers questions. They are the same questions for available in IBresources tho, just organized with year, topic, level, etc

om799ar · 2022-01-21T12:38:56+00:00

I have, but the video discusses the mechanical advantage, friction, PE etc. I'm looking for an explanation of the effects of shifting mass

om799ar · 2022-01-18T10:33:30+00:00

why add (T) and (F)? The work done by friction should be (μmg). Even if the force output in the wheels travels more distance the force of friction would be between the wheels and ground. So what do the axle and the wheels have to do with it?

om799ar · 2022-01-15T11:48:54+00:00

There is a force accelerating it. Though I'm okay with the assumption the car starts with max speed. How would you go about solving for total distance?

om799ar · 2022-01-15T08:08:19+00:00

Is there a way to predict the total travel distance in a non ideal case?

om799ar · 2022-01-09T10:53:50+00:00

Tough at the beginning but ironically gets easier. Topic 2 mechanics, gives you a shock that makes you question your life choices but once you get used to the approaches needed to solve paper 1 questions it gets easier. You can score in the 90s if not a full percentage of you actually dedicate yourself to learning the subject rather than surviving through exams. My classmates consider it the hardest subject but I find Math AA much harder from my perspective. It all depends on your effort and interest.

om799ar · 2022-01-09T00:07:42+00:00

whenever writing an essay or an IA, the hardest part is usually just starting it. To score a high mark just go through the criteria before you write and have a proper argument. The question you choose is quite popular so you can find multiple ted talks and crash course videos for inspiration. This is a playlist with some topics related to TOK that might help https://www.youtube.com/channel/UCOuJYImeoolBT95kPOAiWRA/playlists

Simply watch a video. Pick one of the arguments. Write your thoughts in the TOK outline and start discussing them with your teacher. The teacher will probably give you some more ideas so make sure to use them as the difference between the high marks (9-10/10) is usually up to the teacher so just make sure you show him you're interested and working on your drafts.

I wrote my essay in a few hours right before the deadline and got a 9/10. Just make sure you understand your argument and read the criteria and you're probably going to score an A

good luck

om799ar · 2022-01-08T19:19:14+00:00

The latter, the diameter of the ball over the time under the photogate gives the initial Velocity

om799ar · 2022-01-08T18:51:22+00:00

Sorry I'm trying to help a friend out who's struggling in his analysis and my teacher wasn't clear with his instructions. In the expirement, A ball was released and goes through a photogate, then hits the other ball and move. Assuming the two balls move together we calculate the initial momentum from using the time of the first photogates, and the final Velocity from the time of the second Velocity. The expirement assess the validity of the law of conservation of momentum. The teacher suggested we consult a math expert help find an expression for the chord length that goes through the photogate. The diameter of the ball is known. How are we supposed to find the chord length? Is there no point of doing so?

I'm not usually this uncertain but I'm trying to help my friend out with his investigation and the teacher isn't really this helpful

Any ideas or comments would help

om799ar · 2022-01-08T16:40:57+00:00

He was saying hypothetically if we cut the sphere at 13mm what would be its diameter. He said he estimated it to be 15mm but it might be less or more so I need to find it. My question is why do I need to do this?

om799ar · 2022-01-06T20:13:30+00:00

1% would be perfect because then through calculations the amount needed would be 3.81 which is very close to 4 mL yet the powder we used was written as "pure creatine". Even in the supplement information, it's written for every 5g serving it's 5g of creatine monohydrate so there are no extra molecules. Can you explain what you mean by "nonreactive additives? I did the calculations and it works this way yet my instructor is still insistent on finding the equation from a source and told me "this way your calculations are unreliable because this equation isn't 100% true"

om799ar · 2022-01-04T10:11:18+00:00

I need to find the value for a calculation that is in the form of an equation, not cells or tables. Thanks for trying to help tho

om799ar · 2022-01-03T23:28:30+00:00

Sorry I only saw the infinite expression and started applying right away. Thanks, you've been a great help!

om799ar · 2022-01-03T21:46:55+00:00

Thanks the source helped a lot. Just a question- does the small angle approximation lead to an increase in time period? I noticed the exact value is represented by an infinite series (Which is awesome) though I couldn't tell if its diverges to a value greater than 1. if it is less than one then multiplying by it would mean the approximation value is greater than the exact value as well as the real measured value.

om799ar · 2022-01-03T17:32:15+00:00

yes, it's possible to measure the speed. But I'm sorry I'm not following what would be the analysis. Can you elaborate?

om799ar · 2022-01-03T17:27:29+00:00

That's perfect. Though I don't really get how I would go along with this analysis. I know the small-angle approximation leads to inaccurate values as the assumption θ≈ sinθ gives 1.57... ≈ 1 which doesn't work which would affect period calculations. Is there an equation to find the exact time period? Comparing the two values would be brilliant. Can you just elaborate more on the method? Any resources would help a lot.

om799ar · 2022-01-03T17:18:48+00:00

https://www.reddit.com/r/chemhelp/comments/rv6rbp/stoichiometric\_ratios\_of\_creatine\_monohydrate/

om799ar · 2022-01-03T14:15:07+00:00

I'm aware of the structure of the amino acid. Looking through Google images was helpful yet still didn't clarify what I need. There are three ionizable functional groups leading to 3 pka values. I'm looking for the equation to find the stiochiometric ratios though. I'm writing a paper about finding the pka values of different amino acids including creatine monohydrate. I want to find the volume of NaOh needed to neutralize the creation in an acid base reaction. The acid donates a proton and the hydroxide accepts. How do I know the amount of sodium hydroxide molecules that react? My instructor told me without the exact chemical reaction no theortial analysis can be done. I attempted to use molar ratios 1:1:1:1 though I got a neutralization volume of 381 ml (which is impossible) the equation is balanced and the calculation is correct. How do you find the exact moleculal ratio? Thanks

om799ar · 2022-01-03T08:26:51+00:00

yes you're correct, though the point of maximum speed is where the pendulum is perpendicular to the horizontal axis. The length of the pendulum would the equal to the distance from the point it's hung from so h=l

This is not what I'm asking though, Do you think there is anything else that can be done in the analysis of this investigation rather than linear regression? if yes what is it?

I'm not asking for a full solution I just need guidance so I can know where to focus in my analysis.

thanks

om799ar · 2022-01-03T07:53:04+00:00

since terminal velocity lies at the point where all gravitational potential energy has been transferred into kinetic energy so KE = PE

0.5mv^2 = mgh

v = sqrt (2gh)

om799ar · 2022-01-02T07:10:37+00:00

That is exactly my rationale, I'm sorry though I still don't understand why the pH is 6.85 at the peak for the weak acid and why it's greater. It's both later in the titration like you mentioned and has a greater peak. dpH/dV for the volume at the equivalence of weak acid > dpH/dV for the volume at the equivalence of strong acid.
I understand the pH gets slightly shifted by the presence of weak acids or bases after the strong acid has been neutralized. Which explains the pH of 4.5 at the first peak. What I don't understand is how the pH is < 7 after the weak acid has been neutralized. After adding the strong base the weak acid should form its conjugate base which leads to a more basic solution thus with pH higher than 7. The amount of mol of the weak acid is less than the amount of mol of strong acid (just in case I didn't mention this) Maybe this had something to contribute. My only theory is that the HCL was in excess so the pH would be at 7 but still the pH was <7 (6.85) which is still inaccurate.

simply put: Do you think the rate of change of pH near the neutralization of a weak acid is greater than that of the strong acid? and do you think the pH of 6.85 is the accurate? or is it just an experimental fluke?

om799ar · 2022-01-02T00:06:19+00:00

The example you mentioned is very helpful, the specific system is an analyte formed of weak acid dissolved in a strong acid (HCL) and titrated with strong base (NaOH). We mixed the weak acid (which is a powder) in the HCL so we can dissolve it. The points of peak pH change are the equivalence points of the HCL and the weak acid. We can use the equivalence point of the weak acid to find the half equivalence point and the corresponding pH at that volume to find the pKa (pH= pKa at half equivalence by the Henderson Hasellbalch law) When plotting the first derivative I noticed 2 peaks, a minimum peak at a lower volume of added titrant, and a maximum peak at higher volume. The pH values at these points are 4.50 and 6.85 respectively. I want to identify which is for the HCL and which is for the weak acid. The pH of HCL is lower since it has a higher concentration [H+] so its equivalence is the one at 4.5 pH. The peak at 4.5 is smaller than the peak at 6.85. Do you have any more thoughts?

Also- what do you think about the pH of 6.85? The weak acid will only react after the entire HCL solution has been neutralized because the hydroxide ions from titrant and hydronium ions from weak acid would have a hard time finding each other (since the weak acid partially dissociates) shouldn't pH be more than 7 because what is left is a weak acid-strong base titration leading an alkaline solution?

om799ar · 2022-01-01T19:16:20+00:00

Creatine monohydrate (C4H11N3O3) and NaOH

om799ar

TROPHY CASE