# [S4] Lesson 34 (Thin Lens Year End Revision + Integration Lesson 1 + Chemical Kinetics EOY)

[S4 Physics PMCians]

What we did in 2 hours:

On 22 and 23 Aug, the S4 PH has come together to complete the following:

1) Secret Enclosed – Light Part II (Thin Lens)

2) The Final Lap – Light Waves 2

Do remember:

1. When an object is placed at 2F, the image will be same size. As we move the object nearer to the lens, the image will go further from the lens and become magnified, while moving the object further away from the lens will lead to the image coming nearer to the lens and becoming more diminished.
2. If the light rays from object are parallel before reaching the lens, this means the object is at infinity. The image will be formed on the focal plane of the lens.
3. When the object comes before the 1st F, the image will be on the same size as object. It will also be virtual, upright and magnified. It will be good to remember how to draw the ray diagram for this setup as you already saw from our Final Lap that this is a very commonly asked question.

Solution:

The link given below is the worked solution to those questions that we have flagged as ‘homework’.

Please be informed that this link will expire on 30th September 2020

The Final Dose of Light Part 2 Take Away Worked Solutions.pdf

What you take home:

In this coming week (Aug 29 and 30), we will continue our Revision Series – Static Electricity.

Do remember to always bring your Secret Enclosed AND the revision books for all lessons.

Special Mention:

Should you need assistance in your daily practices in Physics, do send your attempted workings and questions to 9100 1235. We will strive to clarify your doubts.

From the S4PH Team

(Mr Shane, Dr Li and Mr Gary)

[S4 Maths PMCians]

What we did in 2 hours:

This week, we started on integration revision.

We recapped on the technique of integration and went on to practice various questions knowing that there are mainly into 3 different cases.

Case A: Required differentiation and hence applying reverse of differentiation into question

Case B: Changing function into partial fraction and hence applying technique of integration

Case C: Proving trigonometry function and hence substituting it into given question to integrate.

We also moved on to discuss properties of integration and its basic application when the function is unknown. Please do remember to give yourself 30min to practice on the take home test and get back to us if you have any problem.

What you take home:

Solutions to The Last Lap – Take Away Questions and The Final Lap Mock Test are as linked:
https://tinyurl.com/y5tzavg3

Special Mention:

Next lesson we will continue Integration Revision. See you either in zoom or onsite!

Your Friendly Maths Tutors

[S4 Chemistry PMCians]

What we did in 2 hours:

We have kickstarted our revision on Energy Changes by focusing on what happens during a chemical reaction and how the energy profile graph is derived, as well as the important information the graphs provide on bond strength and speed of reaction (i.e. always remember: Eabsorbed for bond breaking vs Ereleased for bond formation!)

What you take home:

You should begin attempting the take home questions on Energy Changes and bring questions to clarify in class, if any!

Special Mention:

We will be recapping the calculation of energy released/absorbed by fuels using stoichiometry and assess the advantages and disadvantages of different forms of fuels in the following lesson. Here’s a quick video on cars running on hydrogen fuel cells: https://www.youtube.com/watch?v=iPheEg-K2qc

REDEEM A FREE TICKET FOR YOUR FRIEND 🙂

We are pleased to inform you that you will be able to redeem a free ticket for your friend to attend lesson with you. You may redeem this ticket via your Student Portal, under Referral and Rewards.

Take note:

• This ticket can only be redeemed once.
• The guest must attend lesson either onsite or online with you at the same timeslot.
• Free ticket only applies to non-PMC students who have never attended any PMC lessons before.
• Redemption period strictly before 31 August 2020. See you!