[S3] Lesson 34 : Thermal EOY Revision + (AM) Secret Enclosed – Quadratic Function + Energy Changes II Updates/Debrief

[S3 Physics PMCians]

What we did in 2 hours:

On 20th, 22nd and 23rd Aug, the S3 PH has come together to complete the following:

1) Secret Enclosed – Thermal Physics

2) The Final Lap – Thermal Physics

Do remember:

1. Thermometric Property is a physical property of a substance that varies continuously with temperature. It was because of calculation purpose, we then assume it takes a linear relationship.
2. There are three formulas of thermal energy to take care of (specific heat capacity, specific latent heat and power rating of a heater with time). Always do up the table to list down the change in state and temperature before equating these quantities to ‘Heat Gain by A = Heat Loss by B’.
3. Conduction takes place best in metal (due to free electron diffusion mechanism) and poorest in gas (particles are further apart for molecular vibration and collision to take place). Convection is a heat process that occurs in fluid (liquid or gas) due to density differences. There are four factors affecting rate of radiation.

Solution:

Attached are the worked solutions to MCQs and Structured Questions that we flagged out as homework during our lesson last week.

Kindly bear in mind that these links will expire on 30th September 2020. It should give you enough time to try those questions and check your workings against our suggested work solution.

https://tinyurl.com/y535yrat

In this coming week (Aug 27, 29 and 30), we will start our revision with Kinetic Model of Matter (inclusive of Pressure) Lesson 1.

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

Do bring along your calculator for the lesson.

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 S3PH Team

(Mr Shane, Dr Li and Mr Gary)

[S3 Maths PMCians]

What we did in 2 hours:

We started our revision to prepare for year-end exam. This week, we covered on Quadratic Functions, mainly the behaviour of quadratic functions.

Generally, we recapped how to:

1)      Solve quadratic inequality (and the mistakes we need to avoid)

2)      Find the discriminant (and to translate common phrases into inequalities)

3)      Show/prove questions (the correct and incorrect steps to prove)

Do you know? Depending on the form of quadratic functions, we can read an important information (y-intturning pointhappy/sad faceroots of the function).

Expanded form: y = ax2 + bx + c

Factorised form: y = a(x – b)(x – c)

Completed-square form: y = a(x – h)2 + k

It’s easy to find out so we leave it to you to explore!

Special Mention:

In the next lesson, we will be revising Polynomials & Partial Fractions.

See you in class!

Your friendly PMC S3 Math tutors

[S3 Chemistry PMCians]

What we did in 2 hours:

We have completed our chapter on Energy Changes, studying how stoichiometry influences the energy changes during the reaction (i.e. take the perspective of the limiting reagent!). We were also introduced to how to assess the advantages and disadvantages of different fuels (i.e. by-products, energy efficiency and storage).

You should complete your take home package on Energy Changes. We will begin with atomic structure and chemical bonding revision in the next lesson. You should begin recapping these topics and bring any questions to clarify in class, in any.

Special Mention:

Did you know that dissolving of ammonium salts are endothermic reactions (might be Do collect your two new books for revision (Last Sprint & Secrets Enclosed) by the next lesson as we will begin revision for SA2. Please text our admins to ensure that there are books available before going down to the centres for collection!

Here’s a quick infographic on various atomic structures proposed by scientists:

Regards,

Mr Jacob