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 STPM 2014/2015

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maximR
post Jun 15 2014, 03:14 PM

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QUOTE(RED-HAIR-SHANKS @ Jun 15 2014, 01:00 PM)
Great! A new thread for the Form 6 batch of 2014/2015, let's put it to good use. thumbup.gif

Anyway, scgoh123, have you been informed of when you'll be taking your STPM Tem 1 Trial? Mine is around in the month of September, which is approximately 2.5 months left from now on. Not to mention that I've got lot's of brush up to do for my English in MUET.....

Particularly for MUET, I found out that this model test papers prove to be quite efficient when you want to put your understanding and mettle in English to the test. The publisher for it is 'Ilmu Bakti':
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How's Further Maths, Maths and Physics going for you.
maximR
post Jul 24 2014, 07:05 PM

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QUOTE(RED-HAIR-SHANKS @ Jul 24 2014, 02:30 PM)
I need some explanation and clarification regarding these questions.

Q1) Ali was wearing his spectacle while driving in his car. When he was about to make a turn towards a roundabout in his right direction, he felt that his spectacle was sliding towards the left. What causes the spectacle to slide in that manner?
The correct answer:
» Click to show Spoiler - click again to hide... «


Now, I've superficially learned a thing or two about centripetal force, but why centrifugal force is not the appropriate answer for the above question? Centripetal force is a force that moves a body the towards the centre of the circle, which is the opposite of the centrifugal force, where a force that draws a rotating body away from the center of rotation. And if we were to refer back to the question, it clearly stated that his spectacle was sliding towards the left when Ali was about to make a turn towards the roundabout, which is in his right. It makes a perfect sense to me but why the answer is not centrifugal force,but instead it is inertia? Where did I go wrong? icon_question.gif

Q2)Which force does the work on a satellite orbiting around the Earth?
The correct answer:
» Click to show Spoiler - click again to hide... «
.

Why the answer for Q2) cannot be centripetal force? I sense that there are some similarities between both of these forces that causes the satellite to orbit around the Earth in such manner.... hmm.gif

Q3)If we spin a circular disk with a circular cavity on the top of it, it is found that the disk flips over. But the question is why does this happen?

I've approached a few of my classmates, and they told me that the correct reason would be due to friction and air resistance. They said that if we were to take a coin and flip it in the same manner, the coin will rotate rapidly in a circular motion and it will come to a stop when the air drag interrupts it's kinetic energy(The coin will only spin perpetually if it is in vacuum). On a another case, it will also stop spinning due to the friction between the coin and the table. I'm pleased with the feedback that I got, but is that really the complete explanation for the given question?
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Q1) Centrifugal force is not a 'force'. Even if you believe in this fictional force, where does it come from? Forces are a result of interaction, either between bodies or a body with a field. No force can ever manifest itself out of nothing. Plus it's not even mentioned in STPM books.

Q2) Again, what is this centripetal force? Gravitational force, of course!

Q3) You're an STPM student now, you need to eliminate vague and inaccurate Physics terms when describing something. How does friction act? On what does air resistance act? How does air drag 'interrupt' kinetic energy? Can you model this situation using Physics? This problem is from Brilliant, and you'd have to ask more people to come up with a rigorous answer.

maximR
post Jul 25 2014, 02:18 PM

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QUOTE(Critical_Fallacy @ Jul 25 2014, 04:19 AM)
As stated by maximR, a centripetal force is NOT a new kind of force. The name merely indicates the direction of the force. It's an adjective!! Therefore, it can be a frictional force, a gravitational force, the force from a car wall, the tension force from a string, or any other force in this universe you could name it.

user posted image

Artificial satellites are continually accelerating towards the Earth. This is because of the gravitational force of attraction between the satellite and the Earth. If a satellite stopped moving forwards, the Earth’s gravitational pull would make it fall to Earth. icon_rolleyes.gif
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How are you? icon_rolleyes.gif
maximR
post Jul 25 2014, 10:33 PM

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QUOTE(RED-HAIR-SHANKS @ Jul 25 2014, 10:23 PM)
Yes, I still remember it. Thanks once again for your aid. Anyway, considering the fact that you fond of books, do have an A-Level book which looks like this sweat.gif :
user posted image
Title: A Level Physics (4TH)
Author: Muncaster, Roger

The reason I ask is that one of my classmates do get his hands on it, and it seems more appetising than any other STPM Physics books so far. I've skimmed the contents, and it can be used from the 1st until the 3rd semester.
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I have that book. Are you from Penang? Because a guy on Facebook asked me for recommendations and I mentioned this one, and his book arrived a few days ago. I think that's your classmate.

It is a good book, which is very suitable for STPM Physics because it's Calculus based ( A-Level textbooks these days only use algebra ). But you can have all the books in the world and yet learn nothing from them. Physics is not about reading and then being content that you've understood what you've read. It's about thinking. Doubting. And attempting HARD problems which can teach you a lot. So, whether or not you want to get Roger Muncaster's book, it's up to you. If you think you can utilise it, why not? It's more detailed than ALL of the STPM books that are being sold. But it's costly. And heavy.
maximR
post Jul 25 2014, 10:44 PM

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QUOTE(Critical_Fallacy @ Jul 25 2014, 03:04 PM)
I'm “busy-body” as usual. laugh.gif

Recently I'm expanding my collection of books. A peculiar bibliophile, huh?. blush.gif

I noticed that your Physics of Motion is now at a whole new level after entering Sunway.

You were talking about “modeling”, a process that most scientists and engineers employ to represent and study a particular real-world system or phenomenon, when many Pre-U students are probably still struggling to understand its concept.

Keep up the good work! wink.gif
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Sunway has got nothing to do with it. biggrin.gif We're still in Introduction to Physics.

During my post-SPM break, I registered for Mechanics Review by MIT on edX. That course changed the way I look at Mechanics now. I thought I knew Mechanics, but boy, was I wrong. The SIM approach is the backbone of the course. SIM stands for System, Interactions and Models. I completed 5 of the modules, but I think I might fail the course because at college, I didn't have time to finish the others. I ended up not completing the 6th and 7th modules, which is a shame. But I learnt a lot from the course so I'll continue with it, regardless of whether I'd earn the certificate or not.

As for Sunway, I have a long story to tell. But for now ( I just arrived at my hometown, extremely exhausted ) I met quite a few brilliant people. And when I say brilliant, they are really brilliant. It is a humbling experience, coming to Sunway. To give you a clue, I have a classmate who recently obtained a Gold Medal in the IMO, a January intake guy with a Silver medal, a few who made it into the Top 20 for OMK, a senior who was the first Malaysian to win the Gold Medal in IMO. My classmates are very enthusiastic when it comes to Maths. We discuss problems, find new approaches to a problem, attempt our own proofs, and spend a lot of hours in the library.

By the way, I'm taking Maths, Further Maths, Physics and Economics. A little bit sad at the fact that I'm forsaking Chemistry.
maximR
post Aug 1 2014, 06:11 PM

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QUOTE(Just Visiting By @ Aug 1 2014, 05:43 PM)
Not possible. Everyone who has completed STPM would no doubt agree that the 2nd term Physics is the easiest. The first and third term are both insanely hard, with some people saying third term's the hardest.
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Isn't this subjective? One could have mastered Mechanics before Electricity and Magnetism, so one finds Term 1's Physics to be a breeze. Or one could have poured his heart and soul into studying E/M during SPM, while only look at Mechanics in passing before STPM.
maximR
post Aug 1 2014, 06:20 PM

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QUOTE(RED-HAIR-SHANKS @ Jul 30 2014, 09:08 PM)
We haven't even started on any Chemistry experiment yet, as my teacher wanted to quickly finish the syllabus. But, I bet that we will do it by next month.

You must be grateful then. You should take this chance by asking her to lend/recommend you some good exercise books or worksheets, considering the fact that she's an author and it will not be surprising at all if she has literally tonnes of them. I don't know if it works the same for you, but I prefer most of the STPM books from the old syllabus(terminal system) compared to the new ones.
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Consider reading outside texts? Cambridge A-Level and Singapore GCE 'A' Level students use texts outside the syllabus, for example Fundamentals of Physics by Haliday and Resnick. I think STPM syllabi have recommendations on books, and I would recommend getting a hold of one of the texts to supplement, or even replace your current STPM textbook. For extra challenge you might want to buy Singapore GCE 'A' Level practice books, especially for Maths, Physics and Chemistry.

Aside from Rice's free Physics textbook, here are a few more which have survived the test of time, for pre-university students or first year undergraduates.

1. University Physics by Young and Freeman
2. Physics for Scientists and Engineers ( with Modern Physics ) by Serway
3. A-Level Physics by Roger Muncaster
4. New Understanding of A-Level Physics by Jim

I think one of them should be enough, as they are very dense and you won't need to study all the chapters.
maximR
post Aug 23 2014, 03:28 PM

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QUOTE(bloodchow2 @ Aug 23 2014, 02:21 PM)
ex matrik grad here and also stpm student before then

study hard, make sure you get 4 A's + 95 co-curriculum marks for your STPM

physic STPM sem 1 learn about basic physics stuff, sem 2 electric magnet, sem 3 nuclear stuff

chemistry sem 1 learn equilibrium, sem 2 periodic table electroplating, sem 3 organic chemistry (this sem need ton of memorising like sejarah)

We matrik student learn 70-80% of stpm syllabus in 1 year
still tough and challenging yet, chewing up physic 15 chapters and chemistry 20 chapters in matrik 1 sem is just nice
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First of all, like what feynman said, it's Physics. With an [s].

Secondly, stop expounding on how hard Matriculation is. And Physics STPM Semester 1 isn't basic stuff. To prove this point, look at how you solved the question involving the wedges and the block, even with your 'STPM'+Matriculation's worth of experience.
maximR
post Aug 23 2014, 03:47 PM

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QUOTE(bloodchow2 @ Aug 23 2014, 03:35 PM)
regarding the wedges and block the question stated with (3) objects which stacked among on top of each other is not within syllabus of STPM and Matriculation fyi

please ask question that is actually within the syllabus or even better asking real past year question
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Tell me, are Newton's Laws of Motion not in Matriculation and STPM syllabus? Did you not draw FBD's in Matriculation?

Or are you saying that wedges do not appear in STPM and Matriculation, hence, aren't a part of the syllabus? sweat.gif

You've got to be kidding me.
maximR
post Aug 23 2014, 04:16 PM

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QUOTE(bloodchow2 @ Aug 23 2014, 03:59 PM)
1 object on top of wedges is considered inside syllabus, 1 object on top of another object on top of wedges is not in syllabus

there is too many variable for calculating that question, you push lowest object can you guarantee the top 2 will not topple down? how do you so sure the highest object wont fall down? and assumption?

the closest question i have found in entire newton law chapter in University Physics 13th edition is only 2 objects max, which is box on top of wedges, you must be kidding me with 3 objects stack among each other actually in stpm syllabus  doh.gif

[attachmentid=4105724]
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shakehead.gif

When you say 'wedges', how many are there? 2,3,4?

You could have one million objects on top of another. The internal forces cancel due to Newton's Third Law. The fact that when you treat the upper block and wedge as a single object, you have only 2 objects to consider hits you right in the face when you say that 2 objects are in the syllabus and 3 aren't! This is a completely ridiculous argument!

If you have learnt Newton's Law of Motion well ( I'm starting to doubt that you have ), you will know how and when to treat multiple objects as a single system. This is not unique to any particular syllabus. It's all under Mechanics. In fact, you were taught to model to objects connected by a massless, inextensible rope as a single point particle in Form Four Physics!

In the problem I posted, there are multiple approaches. You can consider each object individually as a single system and the external forces which act on them, or one of them which enables you to find the desired acceleration, or, in Critical_Fallacy's solution, consider the pseudo-force due to an accelerating reference frame.

As for your comment about the assumptions, I won't touch on that, because it's trivial from the question that it wants you to find the F in which the objects don't move relative to each other. So why are you cracking your head about objects toppling and falling? rclxub.gif

See, Physics is Physics. I feel sorry when I read your comments about the syllabus difference, what is in the syllabus, what is not, etc. It seems like you've missed the point of education, amidst obsession to swallow what is taught and doing past years aimlessly. You always use external factors as reasons. It's like Tom telling his teacher that his dog ate his homework. Instead of admitting that much has to be learnt ( we all have a lot to learn! ), you emphasise the fact that it's not your fault that you don't know how to solve the problem. You easily put the blame on the fact that 'it's not in the syllabus, so I couldn't care less'.

This post has been edited by maximR: Aug 23 2014, 04:17 PM
maximR
post Aug 24 2014, 04:21 PM

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I'm doing CIE A-Levels and I dare say that STPM Mathematics [T] is definitely more difficult than CIE A-Level Mathematics. STPM's covers more content, and certain exam questions, although sometimes are quite direct, require motivation in persevering with the algebraic manipulations. Under time pressure, I'd imagine that one would tend to make simple algebraic errors...

Not to mention the fact that you guys have only a few months to get used to the workload, pace and also the upcoming first-semester STPM exams.

notworthy.gif

This post has been edited by maximR: Aug 24 2014, 04:26 PM
maximR
post Aug 24 2014, 05:17 PM

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QUOTE(RED-HAIR-SHANKS @ Aug 24 2014, 04:58 PM)
But, as a person who has a passion for English and is extremely good with it, don't you think that you would want to at least do more than speaking, eating and talking with the mastery over your English? blush.gif

I have a friend of mine who scored A+ in Chinese subject for his SPM last year, and another one who was able to secure a solid A+ with 1A in her 1119. From what I can see, these students including the likes of you seemed to have the innate mastery over a specific language and can utilize it flawlessly in anywhere, anytime, be it in writing or even in communicating. For me, mastering a language is not like learning Maths, they don't have chapters or topics for me to follow, thus making the job harder for me.
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There's nothing 'innate' in mastering a language. Same goes to Maths, Science and the Humanities. Mastery requires hardwork.

The key to achieving an acceptable proficiency in English is to read, read a lot. Reading non-academic books helps. Some people take great pain in memorising huge words, and beat themselves up to create very complex sentences which are unreadable. There is no need for that. Realistically, nobody in daily life, even native speakers of English, uses big words, even in writing. All the good books out there are very easy to read; sentences, simple and straight to the point. Words used; powerful but not uncommon. Writing complex sentences with plenty of connectors confuse the reader and the message won't be conveyed, not to mention that they might sound very contrived. Errors like dangling modifiers crop up, and this might end up in the audience scratching their heads.

Getting your message across as succinctly as possible is the way to go. This takes time. But if you endeavor in this journey, good things will happen.

All the best Shanks! icon_rolleyes.gif

sidenote: Plenty of A+ English scorers with 1A in 1119 can't even construct meaningful sentences.
maximR
post Sep 3 2014, 08:35 PM

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QUOTE(yellowpika @ Sep 3 2014, 07:15 PM)
...

I definitely prefer spoon feeding education(pretty sure most of us M'sians do anyway as our education system encourages it), but in my situation, I would have no choice but to self study. wink.gif

...

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I expected more of you. When I read that statement, I was disappointed.

I would never call spoon-feeding education 'education'.

This post has been edited by maximR: Sep 3 2014, 08:36 PM
maximR
post Nov 9 2014, 04:01 PM

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QUOTE(RED-HAIR-SHANKS @ Nov 7 2014, 09:06 PM)
Wow!! Your reading score is extremely high! No wonder it elevates your overall MUET score even though you admitted that you were weak when it comes to writing essay.

I've did many Reading practices, and none of them even eclipse 90 out of 120, let alone all of those reading practices that I did hitherto are not exactly on par with the ones I'm about to sit for tomorrow. I don't even know if I'll come out alive with a result of low Band 3...
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Hi, I think to work on your MUET, you need to reinforce your Grammar, either by conscientiously checking your sentences while you type, or getting a good book. You can use all the uncommon words in the world, but if you show gaps in basic Grammar, you might get into trouble with the examiners.

By the way, all the best for your upcoming exams!

This post has been edited by maximR: Nov 9 2014, 04:02 PM
maximR
post Nov 17 2014, 08:34 PM

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QUOTE(RED-HAIR-SHANKS @ Nov 17 2014, 04:38 PM)
Thanks maximR for your advice. And yes, even my MUET teacher often complains that most of the ''low-frequency'' words that I insert in my essays were all out of place, AND some are redundant too.

Thanks once again, I'm gonna need all the luck that I can get in the world.
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With time you'll be splendid! Everybody starts from somewhere.

UQueenslandX Writing English

Watch all the videos if you have the time. It's an indispensable resource.
maximR
post Jan 2 2015, 03:46 PM

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The first video assumes things which you won't know unless you've had some background in Divergent Series, so you need to have a little bit of faith. The actual steps taken should be like in the second video. You can even read the description (on the first video) as to how he manipulates the series, which involves some advanced mathematics.

maximR
post Jan 2 2015, 07:45 PM

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Did your read Tony's blog post?

maximR
post Jan 5 2015, 05:13 PM

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Well done! icon_rolleyes.gif Keep on improving by reading more.
maximR
post Jan 28 2015, 11:49 PM

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QUOTE(RED-HAIR-SHANKS @ Jan 28 2015, 11:40 PM)
Alright, so I guess my answer along the ones from the book are accepted, since the only differences is the +/- signs of our numerators and denominators, thanks.
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There's no difference between yours and the answer... They are identical...
maximR
post Feb 14 2015, 04:21 PM

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Your answer is correct.


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