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  • Nina07's Avatar
    7 posts since May '17
  • Nina07's Avatar
    7 posts since May '17
  • Moderator
    eagle's Avatar
    23,318 posts since Aug '01
  • Moderator
    eagle's Avatar
    23,318 posts since Aug '01
    • Been a moderator here for a number of years (since mid 2007 when I was in Germany),  and have helped countless students with their questions in maths, physics as well as education related questions.

      The name "ExamWorld" also started off here, with examworld.blogspot.sg as the initial blog which help students, and now, ExamWorld as an independent publisher of books for students.

      SgForums Homework Forum holds dear to me. Because of that, I'm offering a discount to buyers of my books on this forum. 15% discount for the first 15 buyers of each title. More details below...

      Introducing the books:

      Books For GCE 'O' LEVEL

      Explain That! GCE ‘O’ Level Physics, 2nd Ed. (ISBN 978-981-47-6192-5)
      Explain That! GCE ‘O’ Level Chemistry (ISBN 978-981-47-6193-2)
      Explain That! GCE ‘O’ Level Science (Physics/Chemistry) (ISBN 978-981-47-6194-9)

       

      What the books are about

      Explain That! is a series of comprehensive guides designed to help students master the skill of answering qualitative questions. Each title comprises a well-curated selection of questions which covers a variety of key ideas and concepts. These books train students to construct their explanations using examiner-style phrasing, giving them greater confidence before and during the examinations. 


      What inspired the books

      When I took on a relief tutoring class in a major tuition centre branch back in year 2008, I realised a common problem among many Physics students... that is they might be able to understand the concepts and the ideas behind a question, but they are unable to translate that understanding into proper phrasings and answers that examiners can easily give marks for.

      The problem was also seen when I am now running my own tuition centre. Over the years, I have students coming to me who were already excellent in Physics (they qualified for the second round of the Singapore Junior Physics Olympiad), yet don't really do well for the paper 2 segment of O level Physics.

      And I have nailed down the problem being unable to properly phrase answers to explanation questions. 

      One problem stems from training in Pri schools, where students were taught to answer by using "key words". That doesn't work for O Level... Key phrases are what are important, not key words. Yet many students are still stuck at "key words".

      And this is where my book comes in. It started off as a mini NOT-for-sale compilation that I gave exclusively to my own students. The questions were chosen and modified from over 50 prelim papers initially. It was really useful to them, and helped turned some of these students from failing to an eventual A1 or A2. None of them ever scored below a B3.

      So I decided last year to publish the first edition, to see how the demand was like. To see how the feedback was like. Pleasantly surprised that the books were snapped up very fast in Popular bookstores islandwide and always out-of-stock.

      So this year, I have published the second edition with even more relevant questions from another 50+ papers. It has more questions, colour, better printed, and clearer... and selling for the same price as the first edition.
       
      In addition, I have also approach my chem tutor for help with the O level edition of Pure Chemistry, and Combined Science (Phy/Chem)


      Now... For SgForums members, I have negotiated with the stakeholders for a 15% pre-launch discount off our selling price at Popular, for the first 15 copies of each title only. This is my mini contribution to SgForums. 

      The selling price for Popular is
      Pure Phy: $8.90
      Pure Chem: $8.90
      Sci Phy/Chem: $12.90

      Only for the first 15 copies of each title:
      Pure Phy: $7.50
      Pure Chem: $7.50
      Sci Phy/Chem: $11.00

      All you need to do, is to send me a PM for more details. 
      Both self-collection at my centre in Hougang (beside Hougang MRT) and snail mail are available.

      Discount ends after 15 copies or by the date of 2nd June 2017, whichever comes first. 
      Edited by eagle 26 May `17, 4:01PM
  • Gemmie_kirito's Avatar
    28 posts since Apr '17
    • The share price of DISA may start to climb as the proposed 50:1 share consolidation was dropped as per yesterday’s announcement.

      http://infopub.sgx.com/FileOpen/DISA_UPDAT...

      DISA Limited is another Reborn Counter, having under gone 4 name changed - first known as Heshe Holdings, renamed Equation Corp, Equation Summit and now DISA Limited. 
      http://www.businesstimes.com.sg/companies-...

      Announcements 
      Proposed Capital Reduction Exercise, Proposed Share Consolidation of 50 shares to 1 share at a Book Closure Date to be determined and the Proposed Subscription of Redeemable Convertible Bonds convertible into ordinary shares in the capital of the Company Shares by the Investors, pursuant to which the Company proposed to issue to the Investors 4 redeemable convertible bonds 
      http://infopub.sgx.com/FileOpen/20161227%2...

      http://infopub.sgx.com/FileOpen/DISA%20Lim... 
      EQUATION Summit Limited subsidiary Disa Digital Safety announced that it has rolled out its Point-of-Sale Activation (PoSA) system at all Walmart stores in the US. 
      http://www.businesstimes.com.sg/companies-... 
      Name Changed to DiSa 
      http://infopub.sgx.com/FileOpen/DISA%20Lim... 
      DISA Limited provides digital protection for products in the retail channel. The Company focuses on protecting both the supplier and the retailer against shrink, fraud, and counterfeiting. DISA serves customers worldwide. 
      https://www.bloomberg.com/quote/DISAConfused
      Point-of-Sale (POS) Activation 
      PoSA is designed to offer complete supply chain and in-store protection against shrink. Focus is on intelligent devices that are digitally locked (at point of production) until the activation code is provided at the POS – consumer unlocks device a single time during product setup. 
      http://www.digital-safety.sg/
  • bowah's Avatar
    17,360 posts since Jun '10
  • bowah's Avatar
    17,360 posts since Jun '10
  • Bsadamsmith's Avatar
    11 posts since Feb '16
    • Chart pattern trading is very much popular among the professional traders in the financial market. The experts use the most reliable chart pattern in the forex market to catch the large movements of the market. If you look at the professional traders in the Singapore trading community then you will notice that most of them are riding the long term trend by using the reliable chart pattern. Forex trading Singapore is very much popular and many traders are considering trading as their full-time business in the world. But trading the most reliable chart pattern requires extensive knowledge in the forex market. In this article, we will discuss top three ways to trade the most reliable chart patterns in the forex market.

      Trade the higher time frame: The novice traders in the financial market always trade the lower time frame in the market. If you look at the professional traders then you will notice that every single one of them is executing their orders in the market in the higher time frame. Forex trading Singapore is so much popular that many traders are now considering it as their prime source of income. If you are determined to master the art of trading then make sure you are trading the reliable chart pattern in the higher time frame. It’s true that you can also trade the chart pattern in the smaller time frame but the quality of the trading signals will be low.

      Use price action confirmation signal: Price action trading strategy is the study of the raw price data of the financial assets. The experts in the financial market use the reliable candlestick pattern to execute high-quality trades. When you are trading the breakout of the chart pattern make sure that you are using the price action confirmation signals in the market. Most of the novice traders in the forex market trades the chart pattern without any price action confirmation signal and thus they lose money in trading. But if you truly want to become a profitable trader then you must use the price action trading strategy in the market. Forex trading Singapore is now very popular since most of the traders are capable of generating profit by trading the reliable chart pattern with the help of price action signal.

      Fundamental factors

      Fundamental factors are the most powerful price driving catalyst in the forex market. If you closely look at your trading chart then you will notice that most of the time the breakout occurs in favor of the long-term prevailing trend in the market during the event of the high impact news release. So when you trade the chart pattern in the market make sure that you do the fundamental analysis in the market. If you ignore the fundamental analysis in the market then it will be extremely difficult for you to trade the breakout of the price of certain assets. It’s true that mastering the art of fundamental analysis will require some time but once you grasp the basic idea you will feel comfortable to trade.

      Useful information

      There are many things that you need to take care while trading the reliable chart pattern in the market. You need to have a solid knowledge about the support and resistance level in the market or else you will not be able to execute the trades in the perfect way. Try to learn the basic candlestick pattern since it will help you to trade with price action confirmation signal.

      Edited by Bsadamsmith 29 May `17, 10:59PM
  • TehJarVu's Avatar
    116,282 posts since Dec '03
  • Tanwt21's Avatar
    7 posts since May '17
    • Hello! I am new here and hope everyone can help mii smile.png I am working on a research study for my FYP and i need 500 people T.T

      Please help by doing the survey via the link: https://docs.google.com/forms/...

      Pls share it to ur friends and family especially >40 years old! (Actually the older the better :D)

      If you have any surveys or need help that is within my means, i will do my part too!

      Thank you very much! Really appreciate it :)

       

      Edited by Tanwt21 26 May `17, 5:00PM
  • Tanwt21's Avatar
    7 posts since May '17
  • Moderator
    H2 Chemistry @ BedokFunland JC (near VJC & TJC)
    UltimaOnline's Avatar
    11,863 posts since May '05
    • Originally posted by glitter58:

      http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s14_qp_41.pdf

      http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s14_ms_41.pdf

       

      qn 3biii) what is the significance of the word excess in the qn? will the product be different if kmno4 is not used in excess? 

      4a) when asked to indetify functional group, is benzene a functional group?

      4bii) for drawing the structure, in the mark scheme, isnt Br in the 3rd position with regards to one of the OH groups? (altho the br in the 2nd position with regards to the other oh group) but i thought OH group is 2 and 4 directing so why is the bromine substitued there?


      Q3) Excess is just to play safe that the required answer will be the completely oxidized product (because there are several partially oxidized intermediates possible, since there are 3 functional groups to be oxidized per molecule here), to ensure complete oxidation of benzene side chain *and* the 2 alkene groups, hence *excess* KMnO4 (ie. mole ratio >> 1:1, in fact, the actual stoichiometry required is > 3:1, because to fully oxidize *each* of the 3 functional groups will require more than 1 mole of KMnO4, but almost all Singapore A level students will die if Cambridge asks *exactly* how many moles required in total) is required to generate the fully oxidized product. Otherwise, if 'excess' wasn't specified by Cambridge, some students may be confused and imagine that KMnO4 might be limiting, and these students will have no idea which of the 3 functional groups gets priority to be oxidized, and oxidized to which extents.

      Q4a) Yes it is.

      Q4b) *Each* phenolic OH group is activating *and* ortho-para directing. Since there are 2 phenolic OH groups adjacent to each other, hence with excess Br2(aq) (instead of Br2 in CCl4), all 3 available positions may be brominated (note the Cambridge Mark Scheme is reasonable, unlike Singapore JC mark schemes which are anal, and Cambridge accepts either 2 or 3 Br atoms substituted), even after considering the deactivating effects of the aldehyde group (which is why after considering both activating and deactivating effects, Cambridge accepts either 2 or 3 Br atoms substituted in, although the better answer is still 3 Br atoms substituted in, all factors considered).

      Edited by UltimaOnline 26 May `17, 2:22PM
  • Moderator
    H2 Chemistry @ BedokFunland JC (near VJC & TJC)
    UltimaOnline's Avatar
    11,863 posts since May '05
    • Originally posted by glitter58:

      http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s14_qp_41.pdf

      http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s14_ms_41.pdf

       

      qn 3biii) what is the significance of the word excess in the qn? will the product be different if kmno4 is not used in excess? 

      4a) when asked to indetify functional group, is benzene a functional group?

      4bii) for drawing the structure, in the mark scheme, isnt Br in the 3rd position with regards to one of the OH groups? (altho the br in the 2nd position with regards to the other oh group) but i thought OH group is 2 and 4 directing so why is the bromine substitued there?


      Q3) Excess is just to play safe that the required answer will be the completely oxidized product (because there are several partially oxidized intermediates possible, since there are 3 functional groups to be oxidized per molecule here), to ensure complete oxidation of benzene side chain *and* the 2 alkene groups, hence *excess* KMnO4 (ie. mole ratio >> 1:1, in fact, the actual stoichiometry required is > 3:1, because to fully oxidize *each* of the 3 functional groups will require more than 1 mole of KMnO4, but almost all Singapore A level students will die if Cambridge asks *exactly* how many moles required in total) is required to generate the fully oxidized product. Otherwise, if 'excess' wasn't specified by Cambridge, some students may be confused and imagine that KMnO4 might be limiting, and these students will have no idea which of the 3 functional groups gets priority to be oxidized, and oxidized to which extents.

      Q4a) Yes it is.

      Q4b) *Each* phenolic OH group is activating *and* ortho-para directing. Since there are 2 phenolic OH groups adjacent to each other, hence with excess Br2(aq) (instead of Br2 in CCl4), all 3 available positions may be brominated (note the Cambridge Mark Scheme is reasonable, unlike Singapore JC mark schemes which are anal, and Cambridge accepts either 2 or 3 Br atoms substituted), even after considering the deactivating effects of the aldehyde group (which is why after considering both activating and deactivating effects, Cambridge accepts either 2 or 3 Br atoms substituted in, although the better answer is still 3 Br atoms substituted in, all factors considered).

      Edited by UltimaOnline 26 May `17, 2:22PM
  • Queen of sgForums
    驚世駭俗醜不啦嘰 moderatress
    FireIce's Avatar
    262,420 posts since Dec '99
  • carbikebus's Avatar
    18,769 posts since Nov '03
    • Originally posted by SBS3004X:

      I will rather not have 43M at all.

      Later pax at Sgoon MRT wait long2 if 43 stuck in jams..So how?You answer ok?

  • carbikebus's Avatar
    18,769 posts since Nov '03
    • A lot of 30xx/31xx A22 back in service..Guess had to do with SBST rejecting the A22 for Seletar?

  • carbikebus's Avatar
    18,769 posts since Nov '03
  • carbikebus's Avatar
    18,769 posts since Nov '03
    • Originally posted by SMB1368T:

      Trident on 117 (not very rare anymore, but more of a seasonal cameo)

      Yesterday that Trident is really in bad shape,Dirty exterior,Wheel bearings gone case(Squeaking when moving)...Black smoke..Wah lao

  • carbikebus's Avatar
    18,769 posts since Nov '03
  • PeterParker1's Avatar
    15 posts since May '17
    • haha.. good luck.  someone else took her virginity, and then someone else take her out on her first date, and then someone else bought her first bday gift.  keep it up..  good luck with this relationship.

  • Adriw7878's Avatar
    37 posts since Apr '17
    • Just wanted to know Singaporean and also its govt view about the "person of interest" (MO1) by US govt.

       

      Still welcome him and his hairy wife to Singapore ?

  • Cp-027's Avatar
    5 posts since May '17
  • SinkTel's Avatar
    2,657 posts since Oct '08
  • Rubyx's Avatar
    1 post since May '17
  • Cp-027's Avatar
    5 posts since May '17