# [J1] Lesson 30 (SHM + Techniques of Integration +Alkenes)

[J1 Physics PMCians] We did it!! Completed Oscillations – Simple Harmonic Motion!

What we did in 2 hours:

In this lesson, we focussed on the Energy in SHM, without having to tediously  memorise complex equations – but knowing how to link the ideas together to create those equations fast and accurately!!

We ended the lesson by examining how Damping affects any oscillation, and showed the difference between LightCritical and Heavy damping.

What you take home:

Oscillations Daily Dose

Please download and print the Daily Dose for your personal revision. The answers and working are at the back:

https://tinyurl.com/y3b3rzhy

SHM Test A answers (for reference only)

https://tinyurl.com/y45x7j85

Special Mention:

Next lesson, we will begin a new topic – Wave Properties!

You may wish to invite your friend for this lesson, and learn how waves are intricately linked to oscillations!

Till we meet again, stay safe and healthy!

From you friendly tutors,

Mr Sim & Mr Kwok 🙂

[J1 Maths PMCians]

What we did in 2 hours:

Moving on with Integration, we consolidated the techniques picked up from the last lesson, new formulae and standard forms, and looked at how questions combined them.

Additionally, we picked up two new techniques: Integration by Substitution and Integration by Parts. Unlike the formulae based approach from the previous section, this part focused more on process. Which means, if you become familiar with these processes, you will never go wrong! Remember, we will always aim to apply them efficiently and neatly, keep practising our fast way of doing things.

What you take home:

The Daily Dose & worked solutions are linked here:

https://tinyurl.com/y2vsye4w

Special Mention:

Further consolidation this week for all of our Integration Techniques awaits, so do come prepared.

See You and Stay Healthy!

Your Friendly Math Tutors

[J1 Chemistry PMCians]

What we did in 2 hours:

This lesson, we have revised the key concepts in Alkanes, looking at its main reaction – halogenation of alkanes. This reaction is described by free radical substitution mechanism, and understood the limitations of this particular reaction. We have also discussed how to estimate the ratio of the products formed, which heavily relies on the number of hydrogen to be substituted, as well as the stability of the radicals.
We then introduced the preparation methods of alkenes, and discussed its first electrophilic addition reaction, paying a lot of attention to its mechanism and how to add substituents properly across the C=C bond through the use of the Markovnikov’s Rule.

What you take home:

The solutions to Everything you need to know series and selected structured questions are found here:

https://tinyurl.com/y44m7jrt

Special Mention:

Next lesson, let us look at the other 3 electrophilic addition reactions and oxidation of alkenes.

Cheers!

Mr Leong

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!