# [S3] Lesson 29 : Thermal Physics Part 3 + (EM) Circular Measure + Periodic Table II Updates/Debrief

[S3 Physics PMCians]

What we did in 2 hours:

On the 16th, 18th and 19th, the S3PH has come together to cover the following during our weekly lesson:

1) Thermal Physics Lesson 3 – Recap on Concept 1 and 2

2) Test B (do together)

Always remember:

1) There are THREE different formulas to calculate the thermal energy (Q): Q = m c (change in T),  Q = m l, and Q = P x t

2) Always make a point to list down the different Q needed by the question (e.g.: ice from – 5 deg C to 5 deg C will require you to tabulate three different Q)

3) When two bodies are interacting through heat transfer, the understanding of’ ‘heat loss by substance A = heat gain by substance B’ is very useful.

We will continue with the Thermal Physics Lesson 3 – Transfer of Thermal Energy.

Special Mention:

This week begins a new normal in the Physics Cafe as you guys are given another option to attend our weekly lessons – the Onsite lessons. It is indeed heartening to see many of you sitting in our Physical Classroom and having very lively discussions with us. Should you have any questions, please feel free to send in your questions (and attempted workings) to 9100 1235. We will do our utmost to assist you in the questions. Should you have any upcoming test or exam, and you would want to re-watch our video to recap on the techniques to solve questions and keywords to write in explanations, please feel free to approach of PMC HQ for more information.

Take care and Always with you,

The S3PH Tutors

(Mr Shane, Dr Li and Mr Gary)

[S3 Maths PMCians]

What we did in 2 hours:

This week, we covered Circular Measure. We learnt that angles can be expressed in two modes – degree or radian, and the different formula for each mode.
We also want to be careful when we try to find trigonometry of an angle in calculator since different modes give us different answers.

Please try the Takeaway Questions (Circular Measure) as homework before referring to the solutions.

Special Mention:

When applying TOA-CAH-SOH, we can only find the acute angles in a right triangle.
In the next chapter on Trigonometry Ratios, we will learn to find these ratios of obtuse and reflex angles. See you in class!

Your friendly PMC S3 Math tutors

[S3 Chemistry PMCians]

What we did in 2 hours:

We made use of our understanding on non-metallic character (i.e. ability to gain electrons) and the atomic radius to rationalise different observations in the reaction of halogens with halide salts as well as physical property trends down Group VII.

We have completed the chapter on Periodic Table. You can now complete the Take Home package on metals. Do clarify any doubts in the following lessons!

Special Mention:

We will be embarking on a new chapter on Metals and like Group VII, metals also participate in displacement reactions! Here’s a video: