Potential Divider Circuits Youtube Link

Potential Divider Circuits and Applications

WATCH HERE

Chemistry Hangout LINK

IGCSE Core Paper 22 (Oct/Nov 2013)

Haze Daze Revision Work

My Dear students,

Schools is out, but learning continues... please do these revisions:

Chemistry
2005 May/June Core paper - Do all questions except Q4


Physics
2005 May/June Core paper - Do all questions except Q12



We will discuss next week during tutorial!

Phy Rev #2: About Forces Part 1

To start understanding forces, we must start by realizing what forces can do (Effects of Force)

A force applied on an object can:
1) Accelerate or decelerate an object (Stop to Move or Move to Stop)
2) Change the direction of a moving object (Includes circular motion)
3) Change the shape of an object (Stretch, press or pull)

What do you use force for?

Types of Forces:

Contact Forces	Non-Contact Forces
Frictional Force	Gravitational Force
Tension Force	Electrical Force
Normal Force	Magnetic Force
Air Resistance Force
Applied Force
Spring Force

Lets look at Tension/Spring Force for Now:

Introducing: Hooke's Law

Refer to this: 
http://www.schooltutoring.com/help/understanding-hookes-law/

Watch the Video:
http://www.youtube.com/watch?v=ZzwuHS9ldbY

Work it out:
 Hooke's Law Exercise:

1.If a spring has a spring constant of 2 N/m and it is stretched 5 cm, what is the force of the spring?            

2.  If a spring has a spring constant of 0.5 N/m and it is stretched 0.5 m, what is the force of the spring?

           

3.  A spring is stretched 6 cm when a mass of 200 g is hung on it.  Calculate the spring constant of this spring. 

4.If you use the spring from problem #3 and hang a 500 g mass on it, how far will it stretch?   Convert your answer to cm. 

5. A spring with a spring constant of 400 N/m has a mass hung on it so that it stretches 8 cm.  Calculate how much mass the spring is supporting. 

  

Answers:

1. (Answer = 0.1 N)          
2. (Answer = 0.25 N)
3. (Answer = 32.67 N/m)
4. (Answer = 15 cm)
5. (Answer = 3.3 kg)

MORE WORKOUT:
http://www.subneutrino.com/Physics%2011/5%20Dynamics/Physics%2011%20-%20Hookes%20Law.pdf

Phy Rev #1 General Physics

There are tons of physics revision guides out there, you just need to know where to look.

For my dear students who want to do quick revisions, and for those who want to check their understanding, here is a very short revision guide that covers a lot of materials very briefly sufficient for the whole form 4 revision.

Download it here:
https://docs.google.com/file/d/0B9a-ayLwSkaCeUlXT2NSZ0FlOGc/edit?usp=sharing

Chem Rev #1 - Fundamentals of Matter

Chemistry is a very confusing subject to students with difficulties imagining what is happening when a reaction takes place. The real problem with it is that students do not see many chemical reactions taking place around them.... or so it seems. 

To the keen observer, chemical reactions are in fact very much alive and real in every part of our daily lives! We just need to observe them.



Before we go too far into reactions in chemistry.. let us first understand matter.
By the end of this revision you should be able to answer these few questions:

Questions on the ATOM
1) What are all matter made of?
2) What are the characteristics of all the sub-atomic particles?
3) How do sub-atomic particles make up the ATOM?
4) What makes different elements?
5) What are isotopes and what are the similarities and differences?
6) How do you get an ION?

With a little bit of HELP, lets turn to a good tutorial website to see what we can learn from it!

Fundamentals of Chemistry:http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/fundamentals/atomsrev1.shtml

Check out their video:
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/fundamentals/atomsact.shtml

Try the exercise and test understanding:
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/fundamentals/atoms/quiz/q53561857/

Good Luck!

Physics Revision Questions F5

Recommendations for IGCSE Physics 2011

Recommendations are based on past performances, class activities and test paper 2 2011 that has just been taken.

If there should be any questions, please do not hesitate to SMS or Email

Tr. Ivan @

ivansehoo@gmail.com

Check your Physics Rockets! result

Hey Form 4 A.. congratulations upon completing the last and FINAL coursework of the year... Please check the marks by clicking on this link to retrieve the PDF file.

You may have to wait 1 minute for the link to allow you to download...

Download Rockets! PDF here

All the Best next year :)

Tr. Ivan

Chemistry Homework - Naming Ionic Compounds

Form 4~!

Get ready for your exams~!

Please complete the chemistry exercise I have just uploaded on your own with the help of your Ion list and Periodic table.

I want to see it on MONDAY!

Thank you~!

See ya'll in school!