# [S3] Lesson 22 (1-7 June) Updates/Debrief

[S3 Physics PMCians]

What we did in 2 hours (PMC LIVE):

Over the live tutorial sessions (May 28, 30 and 31, 2020), we came together to complete ‘Thin Lens’

Always remember:

1. the two rays diagram (1 through optical centre and 1 parallel to principal axis before cutting through the 1st focal point),

2. the properties of the image when object is placed at 2nd focal point (we did explain why we chose to remember this during class), and

In this coming week (June 4, 6 and 7, 2020), we will come together to start another topic “Pressure”.

No documents will be uploaded to the Teachable Website. Want to know why? Read on….

Shout-out:

Book would have been delivered to all of you already and we will be using this book from THIS week on!!

We will NOT be issuing any soft copies during the lessons and HENCE, if you HAVE NOT receive the book, contact us @ 9100 1235.

Special Mention:

Should you have any questions while revising your Physics work, feel free to drop your them (together with your attempted workings) to 9100 1235 (PMC HQ).

The S3PH Tutors

(Mr Wong, Dr Li and Mr Gary)

[S3 Maths PMCians]

What we did in 2 hours (PMC LIVE):

We continued to learn more about Binomial Theorem this week. Since we learnt that there is a pattern in the binomial expansion, we can use general term formula to focus on one term without expanding everything!

Sometimes, either n, a, or b are unknowns (other than x) and it starts to get more complicated. We found that nCr has some formula to it and it’s not some kind of magic. We learnt how to rewrite the “choose” function into algebraic expression and use it to solve these unknowns.

Please click the link here for the solutions to the sections below:

• Questions/Solutions to Daily Dose (Binomial Theorem)
• Solutions to Binomial Theorem Summary (Booklet Page 129 to 131)
• Solutions to Binomial Theorem (Booklet Page 155 to 156)

Special Mention:

In our next LIVE, we will move on to learn a new chapter on Linear Law, the importance of estimating the linearity of a curve. We will learn to convert an equation of curve into a straight line.

Your friendly PMC S3 Math tutors

[S3 Chemistry PMCians]

What we did in 2 hours (PMC LIVE):

We have completed MYE Set A where we acquired important exam skills to solve questions efficiently which will save you significant amount of time (i.e. knowing proportions in mole calculations). We believe these practices will well prepare you for any quizzes that may be coming up.

In preparation for MYE Set B, do continue to consolidate your learning from our previous chapters and apply your knowledge to another week of challenging questions!

Special Mention:

Here’s a video on the precipitation of lead(II) iodide followed by the dissolving of lead(II) iodide and its recrystallisation:

Stay healthy, stay safe, see you this weekend!

Regards,

Mr Jacob

Home-Based-Learning (HBL)

1) PMC Lecture webcast (www.pmcdigital.sg)