Paper 1: Heat Revision

Paper 1: Pressure

Sources & Other subjects link

Salam Ramadhan Al Mubarakh

Tatkala sibuk aku mengulangkaji,

Baru sedar..Ramadan datang lagi..
Penghulu segala bulan yang diberkati..
Sang Syaitan bakal digari..
Hanya tinggal nafsuku sendiri..
Patutkah ada rasa malas lagi..
Untuk aku mengaji..
Untuk aku bangun 4 pagi..
Bertaqarrub kepada Ilahi..

Dosa-dosa lalu harus ditangisi..
Agar diterangi hati..
Mencari satu malam yang dicari-cari
Malam yang penuh misteri..
Malam pujaan para wali ..

Aku lemah Ya Ilahi..
Tekanan SPM sedangku hadapi..
Akibat kelalaian diri sendiri..
Kepada mu ku tangisi..
Memohon apa tersirat di hati...

Aku lemah Ya Ilahi...
Kejayaan SPM ingin ku hajati..
Berilah aku ketenangan hati..
Permudahkanlah urusan ulangkaji..
Agar ilmuku diberkati..
Menjadi mukmin yang sejati.

(nukilan pelajar faqir)

Saya mengambil kesempatan ini untuk mengucapkan salam ramadan al mubarakh kepada semua pengunjung muslim. Ambil peluang pada bulan yang mulia ini untuk kuatkan amalan, beristigfar serta banyakkan solat hajat. Mudahan hajat kita dimakbulkan Ilahi.

"Pray Hard, Study Smart "

Quick Revision Series

Form 4 Revision:Chapter 3:Pressure

By using kinetic theory of gases,explain how gas pressure exist in a container?
- A gas consists of molecules that moves freely & at random
- This causes the molecules to hit the container's wall frequently
-There is rate of change of momentum exerted on per unit area of the wall during each collision.
- This causes pressure to be exerted on the wall.


What instrument being used to measure gas pressure?
Bourdon Gauge

Explain atmospheric Pressure?
-The earth is developed by a layer of air or gas molecules referred as atmosphere.
-Weight of these air molecules are pushing down on the earth surface
-Thus atmospheric pressure is exerted.

How does atmospheric pressure affected by altitude? Explain your answer.
-The higher the altitude, the fewer the gas molecules are present.
-There are less weight of air molecules pushing down towards the surface area
-Therefore, less atmospheric pressure being exerted.
-As a conclusion, the higher the altitude, the lower the atmospheric pressure.

SPM:Radioactive Revision

Try this radioactive revision exercise..
Click here to Download this file
It's answer scheme is available the bottom of this post..make sure u buat dulu, lepas tu baru tengok jawapan.


Download answer scheme

Electromagnet's "Birthday"

Hi guys..how's your revision?..hope u are doing well with your trial & SPM preparation..

If u notice today, google has displayed above image on top of its search engine. It looks like a wire coiled on a nail, which then connected to a battery. Hmm.. it seems like an electromagnet, isn it?
Then i checked & found out the image is meant to remind us on the birthday of a man named
Hans Christian Ørsted.
Who is he??? ..to know more about this mysterious guy,read this article if u wanna know abt some SPM tips:

While preparing for an evening lecture on 21 April 1820, Ørsted developed an experiment which provided evidence that surprised him. As he was setting up his materials, he noticed a compass needle deflected from magnetic north when the electric current from the battery he was using was switched on and off. This deflection convinced him that magnetic fields radiate from all sides of a wire carrying an electric current, just as light and heat do, and that it confirmed a direct relationship between electricity and magnetism. The first person to observe this phenomenon was actually Gian Domenico Romagnosi in 1802^[2]. Romagnosi's account of an electrostatic charge from a voltaic pile deflecting a magnetic needle, published in an Italian newspaper, was largely overlooked by the contemporary scientific community.

At the time of discovery, Ørsted did not suggest any satisfactory explanation of the phenomenon, nor did he try to represent the phenomenon in a mathematical framework. Three months later he began more intensive investigations. Soon thereafter he published his findings, proving that an electric current produces a magnetic field as it flows through a wire.

His findings resulted in intensive research throughout the scientific community in electromagnetism. The findings influenced French physicist André-Marie Ampère's developments of a single mathematical form to represent the magnetic forces between current-carrying conductors.

Well..i think he has contributed a lot in the world of physics. As a result, like it or not, u & i have to crack our brain while studying his discovery on electromagnet. I think electromagnet gonna be one of the favorate questions in SPM this year as well as in trial exam for KL student.So make sure u 've covered abt principle of electromagnet,induction,lenz law,faradays law & its experiment and its application like electric bell, motor,generator & etc.

By the way..to Mr Hans..just wanna wish uHappy Birthday wherever u are :) hehe

SPM "A1" vs H1N1

Hi guys,

Many student asked me why I dont post quite often as i always did. Some of them said i did inspire them to study through my series of SPM tips. Well if it did inspired some of u, i thank Allah for His word of wisdom. There were many unplanned things happened to me. My health condition was not encouraging as well. I had flu, bad cough & soar throat for a week & not fully recovered. Thank to Allah... I 'm not infected by this 'selsema b@b!'. We had enough of JE
last time, and now its H1N1. I believed there are thousands of hikmah why muslims are prohibited from eating this creature.

Somehow i've to quarantine myself from seeing my student. I dont want them feel uncomfortable while doing their revision,especially in this critical moment. Lots of my students dint go to school for preventive measure. However there's one of them who is positively infected by H1N1..& i wish she'll get well as soon as possible.

Realizing the chaos caused by this H1N1, i want to share with u how important for 2009 SPM candidates to look after their heath. It shall be a sad thing if u have to sit for exam while having a flu, selsema, batuk, pening, sakit perut..patah kaki due to football match & etc. Patah kaki?? Can it happen to u? Well i wanna share a true story about my friend who had to take SPM with a broken hand. He involved in a stupid fight with a group of student which ended up broken
his right hand just 2 weeks before SPM. He took the SPM with extra hours but in the end received a bad result. Of course we can't deny 'takdir Ilahi', but..we can put serious effort to prevent it. As the wise man said "Prevention is better than Cure". In my friend's case,he should had avoided those stuff rather than getting involved directly with the fight.

Another thing that makes me worry is about some students'habit & lifestyle.These students are staying up until late night to do revision which they seldom did in the past months. Then, they 've to wake up early for school. If u are one of them, i think your biological clock being forced a sudden change.I'm not good in biology, but i do believe this causes your body to be restless.Trust me..the next couple of months gonna be a stressful period. Your brain need to handle lots of pressure.Your
body has to adjust with increase in anxiety, worryying, panicking, fatigue & high level of adrenaline. Macam-macam feelings ada! In the end your body system is defenceless to diseases like flu, cold, migraine & the worst case should be H1N1. Just imagine if any of those diseases affected u on the day of exam..
No point if u've made an excellent preparation but due to your ignorance of your own health, u've to sit for SPM in discomfort. Definitely its gonna affect your A1 result.

My sincere advice is.. please dont take your health for granted. Start to practise healthy diet & healthy lifestyle. Take a lot of fruits & vegetables in your daily meal. If possible, ask your parents for multivitamin and other supplement. U must be fully fit either physically or mentally before your big day.
Let us pray that may Allah give all of us a good health on the day of SPM.
Ameen

F4 Quick Revision: Pressure

"Revision of the Day Series"

1. Presure is defined as the force acting pependicularly on per unit area
P= F/ A

2. Pressure in liquids:
P = h ρ g

What is the relationship between depth of liquid and pressure?
The more the depth of liquid the more the pressure at the lowest point of liquid

What is the relationship between density of liquid and pressure?
The higher the density of liquid the higher the pressure

3. Atmospheric Pressure:
-The atmospheric pressure is influenced by the altitude
-The higher the altitude from sea level the lower the atmospheric pressure

4. Archimedes principle:
Buoyant Force = Weight of fluid displaced
(B.F= ρVg)

Factors that affect buoyant force in liquid:
-Volume of object/material
larger volume = bigger buoyant force

-Density of the liquid,
denser liquid exerts larger buoyant force

-Gravitational field strength, g

Relation between buoyant force (B.F) & weight of object:
Object floats when, B.F = Weight of object
Object sinks when, B.F < Weight of object

Relation between volume of object & volume of liquid displace:
Volume of immersed object = volume of liquid displace
......................................................................................................................................................................

Bernoulli Principle:
High speed flow of fluid causes low in pressure.

Bernoulli application:
Aerofoil, carburetors,bunsen burner, insectiside sprayers