# [S3] Term 2 Week 3 (6-12 Apr) Updates/Debrief

[S3 Physics PMCians]

What we did in 1.5 hours (PMC LIVE):

We have completed discussing the concepts of Moment of a Force and Principle of Moment, with a clear understanding of the meaning of equilibrium

Although this LIVE tutorial is different from the physically classes, the tutors witnessed the same enthusiasm given by all of you and the group chat were very lively with you giving feedback and asking questions.

Kudos to all!!

During the LIVE tutorial, we reviews on the procedure of solving questions related to moments through the LIVE chat challenge.

1) Locate the pivot

2) Identify the forces and their perpendicular distance

3) Group these forces (ie.: clockwise or anticlockwise)

4) Apply POM

5) And if the question has two pivots, we can also apply the translational equilibrium (i.e.: sum of all forces = 0)

We ended off our LIVE tutorial by (I) breaking into different rooms to compete and complete the usual 4Q team challenge, and (II) the T/F quiz.

What you take home:

Before the respective LIVE tutorial sessions begin this coming weekend (18 and 19th April), we would like to invite all of you to complete the online webcast lecture on Moment Lesson 2

Do remember to download (and print, if you can) the tests before you start the webcast, which are available on the webcast website.

Special Mention:

Though we may not have our usual face-to-face sessions where you could stay back to ask your tutor questions, we are always here giving full support to your learning in Physics. So, if you have any question(s) to ask, feel free to send them to 9100 1235 (PMC HQ).

Meanwhile, stay safe, stay home and, of course, stay awesome!!!

Always with you for your Physics Learning,

Your friendly Physics Tutors & The S3PH team (Mr Wong, Dr Li and Mr Gary)

[S3 Maths PMCians]

What we did in 2 hours:

During the two LIVE tutorial sessions, we have covered Exponential Functions and dived into Logarithmic Functions.

To sum up what we have learnt:

Exponential Functions

• Solving exponential equations with the same base
• Simplifying exponential equations with different bases

Logarithmic Functions

• Converting index form to logarithmic form and vice versa
• Laws of logarithms

o   Product/Quotient property

o   Power property

We have explored more question types on Logarithms, and discussed how to manipulate logarithmic equations.

We also had team challenges to work on a quiz, then ended off with Kahoot.

What You Take Home:

Please continue to try the remaining of Take Away Questions:

• Logarithmic functions, Page 39 & 40, Question 5, 9 to 13 (includes changing of base)

Special Mention:

Please watch the next lecture on Logarithmic Functions. We will explore on changing of base and solving tougher questions in Logarithms. We will have more engaging quizzes prepared for you. See you next week in LIVE !

[S3 Chemistry PMCians]

What we did in 1.5 hours (PMC LIVE):

We appreciated the purpose of ionic equations and mastered tips to write them efficiently and accurately. We also learnt two different ways of forming soluble salts.

Group I and ammonium salts: Titration

Other soluble salts: Adding excess insoluble reagents

What you take home:

It is a good time to revisit some of the chemical equations written in the notes of Acids & Bases and try writing ionic equations for them!

Special Mention:

Here’s a video on how copper(II) sulfate is made in the lab. Before watching the video, have a think how you would want to prepare a pure and dry sample of this soluble salt.