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GCE ‘A’ Level 2010 Oct/Nov H2 Maths 9740 Paper 2 Suggested Answers & Solutions

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Posted at 4:30 am by Mr Loi in Mr Loi the A Level Tutor

Sorry to have kept everyone waiting, especially those who have been camping at the H2 Maths Paper 1 blog post.

Before that blog post’s comments section turns into a mini chit-chat lounge, here are the H2 Maths Paper 2 solutions that I’ve managed to get them done up despite my busy day (yesterday), with a little help from my siblings once again.

2010 A-Level October/November H2 Mathematics 9740 Paper 2 Suggested Solutions
2010 ‘A’ Level October/November H2 Mathematics 9740 Paper 2 Suggested Solutions
– click to download (Latest Version: 1.3)

Like students under exam pressure, I’ve done this under a bit of ‘pressure’ as well from the baying horde of “When will paper 2 be out?!”, “answers please!!!” etc. So, as with Paper 1, please leave a comment whenever you spot any mistake, typo and/or better/quicker/smarter methods (I really appreciate these! :) ) and I’ll update the solutions as and when required.

Meanwhile, good luck for your remaining papers, and good morning to you if you’re seeing this the first thing on a bright Saturday morning!

As for me, it’s time for bed …

がんばって!!!
Mr Loi
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GCE O-Level 2010 Oct/Nov Combined Science (Physics/Chemistry/Biology) MCQ Paper 1 Suggested Answers & Solutions

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Posted at 2:26 am by Little Miss Loi in Little Miss Loi the Science Tutor (archived)

While all of you (at least those of you who are not taking Bio on Monday) are out celebrating the end of your O Levels, I’m forced by my sister stuck at The Temple to finish up the solutions (along with the relevant explanations, where applicable) to the two combined science papers today :(

O-Level 2010 October/November Combined Science 5116 Paper 1 Suggested Solutions O-Level 2010 October/November Combined Science 5118 Paper 1 Suggested Solutions
2010 ‘O’ Level Oct/Nov Combined Science MCQ Paper 1 Suggested Solutions
Physics/Chemistry 5116 (left – Latest version: 1.1) & Chemistry/Biology 5118 (right – Latest version: 1.2) – click to download

It’s pretty late now so please leave a comment should you spot any mistake, and I’ll try my best to reply the growing list of comments over this weekend. What a cramped timetable we have this year *rubs panda eyes*

がんばって!!!
Little Miss Loi
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GCE ‘O’ Level 2010 Oct/Nov Physics 5058 (MCQ) Paper 1 Suggested Answers & Solutions

(35)
Posted at 11:16 pm by Little Miss Loi in Little Miss Loi the Science Tutor (archived)

Hello again everyone.

Once again, my 师姐 and I have drafted list of suggested answers for this year’s Physics 5058 MCQ Paper 1, which appears to contain a fair bit of bizarre controversies pertaining to skydiving, weird diodes, push-ups etc.

2010 O-Level October/November Physics 5058 Paper 1 Suggested Solutions
2010 O-Level October/November Physics 5058 Paper 1 Suggested Solutions
– click to download

With all the “Confirm I’m right and you’re wrong!!!!!” flying around, please leave a comment if you spot any mistake, typo and/or wish to violently disagree with clarify any of the explanations given.

Good luck for those of you with your remaining papers! WE’RE ALMOST THERE!!!

がんばって!!!
Little Miss Loi
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GCE ‘A’ Level 2010 Oct/Nov H2 Maths 9740 Paper 1 Suggested Answers & Solutions

(81)
Posted at 5:26 pm by Mr Loi in Mr Loi the A Level Tutor

Hello again guys,

I’ve heard your little chorus of comments even as I was having my classes this afternoon.

So with whatever time I have at my disposal today, I’ve managed to squeeze this out (with a little help from my sister):

2010 A-Level October/November H2 Mathematics 9740 Paper 1 Suggested Solutions
2010 ‘A’ Level October/November H2 Mathematics 9740 Paper 1 Suggested Solutions
– click to download (Latest Version: 1.1)

As usual please let me know via the comments should you spot any mistake in the H2 Maths Paper 1 solutions.

Meanwhile, here’s a list of topics which you might find it worthwhile to go through again before your Paper 2 tomorrow.

  • Integration (by parts, by substitution, volume of revolution etc.)
  • Summation
  • Mathematical Induction
  • Arithmetic & Geometric Progressions (AP/GP)
  • Complex Numbers: Solving complex roots via simultaneous equations or de Moivre’s Theorem
  • Composite Functions
  • Statistics (this one no need to say)

All the best for your Paper 2!

がんばって!!!
Mr Loi
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Fourteen Last-Minute Buddha Foot Hugging Questions For Physics MCQs

(1)
Posted at 7:15 pm by Little Miss Loi in Little Miss Loi the Science Tutor (archived)

Hello everyone,

After a ‘lull period’ of relative inactivity (unless you major in Humanities of course), the Physics tikam-tikam MCQs are finally here to wake all from the premature post-O Levels slumber, and snare those who still refuse to wake up.

To help you amass those 40 marks (that’s 30% of your total score) that’s on offer, my 师姐 and I have compiled a short list of 14 questions (from 10 topics) for your quick practice as a final go-through before your early sleep tonight (remember it’s a short & sharp 8am MORNING paper not 3am!).

Last but not least, whether you’re taking your Physics or Chemistry or Biology or Combined Science or all of the above MCQs in the next few days, a final reminder to:

  • Bring your 2B pencil, eraser & protractor.
  • Bring your calculator (DUH!!! – you didn’t throw it away after your maths papers right????)
  • Pace yourself, read your questions carefully …
  • … and make sure you stay cool and transfer your final answer from your ultra-messy workings to the CORRECT shaded oval on your OMR/answer sheet. Remember the OMR is cold-blooded, and the TOTO counter has never shown any mercy to those who miss the winning number by a single digit because he/she shaded on the wrong oval!
All the Best & May The F=ma Be With You!

Now to locate the source of that eerie sobbing sound I’m hearing right now …

Kinematics (Graphical Analysis)

The velocity-time graphs of Car A and Car B are shown. Which of the following statements correctly describe the motion of both cars?

Physics sample MCQ 3 diagram

  1. Throughout the 9 s interval, Car B is leading.
  2. Initially, Car B is leading. After 6.5 s, Car A is leading.
  3. Car A and Car B meet each other at 0 s and 6.5 s respectively.
  4. Initially, Car B is faster than Car A. After 7 s, Car B stops moving while Car A continues to move on.

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

A

Vectors (Parallelogram Law & Tip to Tail Method)

Physics sample MCQ 5 diagram

A string of negligible mass with a weight of 50 N at one end is attached at the other end to a fixed point P. The sphere is acted upon by a horizontal force of 80 N such that the string makes an angle θ to the vertical. What is the value of θ?

  1. sin−1(8/5)
  2. cos−1(8/5)
  3. tan−1(8/5)
  4. tan−1(5/8)

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Two forces, P and Q, act on a body. A frictional force F holds in equilibrium. Which of the following could represent the relationship between these forces?

Physics sample MCQ 6 diagram

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Pressure (Barometer & Manometer)

Physics sample MCQ 12 diagram

A U-tube contains copper sulphate solution in one limb and paraffin in the other. The meniscus of the copper sulphate solution column is 40 cm above the common level while that of the paraffin column is 50 cm. Given that the density of copper sulphate solution is 1.2 g/cm3, what is the density of paraffin?

  1. 0.80 g/cm3
  2. 0.96 g/cm3
  3. 1.2 g/cm3
  4. 1.5 g/cm3

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

B

Physics sample MCQ 13 diagram

The diagram shows a narrow glass tube with a thread of mercury 12 cm long. Some air is trapped between the mercury thread and the sealed end of the tube. Given that the atmospheric pressure is 760 mmHg, what is the length of trapped air when the tube is positioned vertically with the open end facing down?

  1. 20 cm
  2. 27 cm
  3. 28 cm
  4. 38 cm

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

D

Transfer of Thermal Energy (Conduction & Convection)

The chief mechanism for conduction in a typical metallic conductor involves the

  1. diffusion of atoms in a conductor from the hot end to the cooler end.
  2. atoms near the hot end sending out energy to atoms near the cooler end.
  3. diffusion of free electrons in the conductor from the hot end carrying their energy along with them.
  4. atoms near the hot end vibrating with big amplitude about their fixed positions and transferring their energy to neighbouring atoms located in cooler regions by knocking against them.

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Which of the following statements about the vacuum flask is incorrect?

  1. The walls of the glass container are silvered to reduce radiation.
  2. The vacuum in the double-walled glass effectively prevents conduction and convection.
  3. Loss of thermal energy by radiation is minimized by keeping hot water in a double-walled glass container.
  4. Loss of thermal energy is minimized by using a cork or plastic stopper to close up the neck of the glass container.

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Temperature (Range, Sensitivity & Responsiveness)

John replaced his original thermometer with another one with a bigger bulb which contained more thermometric liquid. What are the changes in terms of response, sensitivity and range?

Response Sensitivity Range
A Decrease Decrease Increase
B Decrease Increase Decrease
C No change Increase Decrease
D No change No change No change

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

B

Lens (Distant Object)

A telescope uses a converging lens to see birds which are far away. If the focal length is 20 cm, what is the distance from the observer’s eye to the lens to see a clear image of the bird?

  1. 10 cm
  2. 20 cm
  3. 40 cm
  4. 500 cm

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

B

Electromagnetic Spectrum (Properties & Applications)

Which of the following statements is true about all electromagnetic waves?

  1. They can be detected by a radio aerial.
  2. Only sound wave requires a medium to travel.
  3. They obey the laws of reflection and refraction.
  4. They carry charges and are not affected by electric fields and magnetic fields.

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Which of the following uses gamma rays?

  1. Sterilising
  2. Killing cancerous cells
  3. Detecting flaws in metals
  1. I & II only
  2. I & III only
  3. II & III only
  4. I, II & III

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

D

Electrostatics (Law of Electrostatics)

Physics sample MCQ 27 diagram

Two neutral conducting spheres are placed touching each other and supported by insulating stands as shown. Which is the correct sequence to induce opposite charges to the two spheres?

  1. Remove the charged rod.
  2. Earth the spheres instantaneously.
  3. Place a charged rod near the conducting spheres.
  4. Separate the two spheres by pulling the insulating stands away from each other.
  1. III, II, I
  2. III, II, IV, I
  3. III, IV, I
  4. IV, III, II, I

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C

Practical Electricity (Live, Neutral, Earth wires)

A switch was connected along the neutral wire of a fan. Which of the following statements is/are correct?

  1. The fan would not operate when the switch is closed.
  2. The fan would still operate when the switch is opened.
  3. The fan would still be connected to the high voltage source when the switch is closed.
  1. I only
  2. III only
  3. I & II only
  4. I & III only

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

B

Electromagnetism & Electromagnetic Induction

A conducting rod and an insulating rod (both axes go into the paper) are being dropped between two magnets as shown. Which of the following are true?

Physics sample MCQ 37 diagram

  1. The conducting rod will be attracted to the magnets.
  2. The induced current in the conducting rod flows out of the paper.
  3. The conducting rod takes a longer time to pass through the magnetic field than the insulating rod.
  1. I & II only
  2. I & III only
  3. II & III only
  4. I, II & III

[+] Warning ANSWER - my sister says you’ll suffer a terrible fate if you click & peek at the answer before you’ve tried the question!

C
がんばって!!!
Little Miss Loi