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A-Level Physics Tuition Singapore/H2 Physics Tuition/JC Physics Tutor

Hi Shu Yuan

Solutions send to you via email
Concise notes on waves, superposition, AC and E-field will be given to you on the net lesson

Best Regards
A-Level Physics Tuition Singapore Tutor

[admin]

O-Level Singapore/O-Level/Physics and Chemistry Tuition/Physics Tutor

Kinematics – Key Concepts

1. Speed is the distance moved per unit time
2. Velocity is the change of displacement per unit time
3. Acceleation is the change of velocity per unit time
4. The gradient of the tangent at a point on the distance-time graph gives the instantaneous speed
5. The gradient of the tangent at a point on the speed-time graph gives the instantaneous accleration.
6. The area under the speed-time graph is the total distance travelled.
7. When air resistance is negilible, all objects fall under gravity with a constant accleration 10 ms-2
8. When there is air resistance, falling object will experiences deceleration until it reaches a terminal velocity. This happens when the weight of the object is equal to the air resistance

Chapter 3 – Purification and Separation

How to determine that a substance is pure?

If the substance has a fix melting and boiling point, the substance is pure. We can also use chromatography to check for pure substance.

[admin]

O-Level Singapore/O-Level/Pure Physics Tuition/Physics Tutor

Kinematics – Key Concepts

1. Speed is the distance moved per unit time
2. Velocity is the change of displacement per unit time
3. Acceleation is the change of velocity per unit time
4. The gradient of the tangent at a point on the distance-time graph gives the instantaneous speed
5. The gradient of the tangent at a point on the speed-time graph gives the instantaneous accleration.
6. The area under the speed-time graph is the total distance travelled.
7. When air resistance is negilible, all objects fall under gravity with a constant accleration 10 ms-2
8. When there is air resistance, falling object will experiences deceleration until it reaches a terminal velocity. This happens when the weight of the object is equal to the air resistance

[admin]

O Level Chemistry Tuition Singapore/Chemistry O Level Tuition/Tutor

Chapter 3 – Purification and Separation

How to determine that a substance is pure?

If the substance has a fix melting and boiling point, the substance is pure. We can also use chromatography to check for pure substance.

From : O Level Chemistry Tutor

[admin]

A-Level Biology Tuition Singapore/H2 Biology Tuition/JC Biology Tutor

Please be inform that Biology Intensive Revision during the June holiday start on 11 June.

Schedule as follow

11 June Monday to 14 June Thursday – 10 am to 1 pm
Diversity and Evolution

11 June Monday to 14 June Thursday – 2 pm to 5 pm
Organisation and Control of the Prokaryotic and Eukaryotic Genomes

Form A-Level Biology Tuition Singapore

[admin]

A-Level Physics Tuition Singapore/H2 Physics Tuition/JC Physics Tutor

Hi Jetaime

Soln sent via email

Best Regards
Mr Ong

[admin]

A-Level Economics Tuition Singapore/H2/H1 Economics Tuition

S.R.J.C Method for eassy writting

Please be informed that sample of eassy writting using S.R.J.C method is posted in the Economics Resources

From A-Level Economics Tuition Singapore Admin

[admin]

A-Level Maths Tuition Singapore/H2 Maths Tuition/JC Maths Tutor

Hi Zhuo Rong

Solutions for Probabilty, Bionial Poisson and Normal Distribution, Sampling will send to you by Monday

Cheers!
Mr Ong

[admin]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi All A-Level/JC/H2/H1 Chemistry Students

Starting 28 May, we are conducting Chemistry Revision Programme.
Please refer to the Schedule for more detials.

We can also customise the schedule to suit you

From
A-Level/JC/H2/H1 Chemistry Tutors

[admin]

A-Level Maths Tuition Singapore/H2 Maths Tuition/JC Maths Tutor

Hi All A-Level/JC/H2/H1 Mathematics Students

Starting 29 May, we are conducting Mathematics Revision Programme.
Please refer to the Schedule for more detials.

We can also customise the schedule to suit you

From
A-Level/JC/H2/H1 Mathematics Tutors

[admin]

A-Level Physics Tuition Singapore/H2 Physics Tuition/JC Physics Tutor

Hi All A-Level/JC/H2/H1 Physics Students

Starting 4 June, we are conducting Physics Revision Programme.
Please refer to the Schedule for more detials.

We can also customise the schedule to suit you

From
A-Level/JC/H2/H1 Physics Tutors

[admin]

A-Level Economics Tuition Singapore/H2/H1 Economics Tuition

June Revision by Ryan

Course Objective:

To impart essay and case study answering techniques over the course of 6 lessons, 3 hours each. Students will acquire the important skills of answering questions with the correct Scope, Rigor, Judgment and Context.

Course Focus:

The course will cover the entire macroeconomics syllabus under the H1 syllabus for 2012 GCE A Level Examination set by Cambridge in collaboration with MOE. The exclusive focus on solely macroeconomics is due to the inter-connectedness of all the chapters under macroeconomics, and students are required to have a broad understanding of all topics before they can be adequately prepared to answer a macroeconomics question fully.

Lesson Sequence and Materials:

Students in this course will not necessary revise the concepts in the order in which the topics were taught in schools. Instead, challenging essays and case studies would be given every lesson to help students perfect their answering techniques during actual examinations.
If the students request, additional notes will be provided to help students understand the topics better.
Throughout the crash course, we will complete a total of 6 to 10 case studies and 6 to 10 essays that spans all key topics and ideas in macroeconomics.

A-Level Economics Tuition Singapore – Admin

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A-Level Maths Tuition Singapore/H2 Maths Tuition/JC Maths Tutor

Hi J1 Students

To find the inverse of y = x – 1/x
Multiply the equation by x
xy = x^2 -1
x^2 – yx – 1 = 0
using x = -b +- Sq rt( b^2 – 4ac) divide by 2a

x = y +- sq rt ( y^2 – 4.1.-1) divide by 2
= y +- sq rt ( y^2 + 4)divide by 2

Cheers A-Level Math tuition Tutor

[admin]

A-Level Chemistry Tuition Singapore/H2 Chemistry Tuition/JC Chemistry Tutor

Hi Yan Yan

Solution for Atomic Structure
Qns 22 NYJC 09/4

Q26 PJC 09/H1/4
For Cl the 4s orbital is filled before the 3d orbitals
For Cr and any transition metals the 3d orbitals lie at the lower energy tha 4s orbitals
Ans B

Q28 SAJC 09/4
Element X is in Group III while element Y is in Group VI. Hence the formula formed between X and Y is X2Y3.
Ans B

Q42 Nov 09/4
1st & 2nd IE of Al = 577 + 1820 = 2397 kJ mol-1
1st & 2nd IE of:
(A) Co = 957 + 1640 = 2397 kJ mol-1
(B) Cr = 653 + 1590 = 2243 kJ mol-1
(C) Cu = 745 + 1960 = 2705 kJ mol-1
(D) Ni = 736 + 1750 = 2486 kJ mol-1
Ans A

Q44 DHS 09/3
The greatest jump is between the 6th and 7th I.E. Hence element X must be in group VI. Therefore, either O or Te is the answer. But with reference to the Data Booklet, the I.E. values do not correspond to that of oxygen. Hence, element X is Te.
Ans D

Q48 MI 09/3

Q50 ACJC 09/5
A: It is a Group II element as the big increase from its 2nd to 3rd IE suggests that the 3rd electron is removed from an inner shell.
Since it is in Period 2 Group II, the element is Be.
B: BeO is an amphoteric oxide (diagonal relationship with Al2O3)
C: Incorrect statement as BeCl2 is a simple covalent molecule.
D: Be, being a metal, can conduct electricity both in solid and molten states due to the presence of mobile delocalised electrons.
Ans C

Q54 SRJC 09/H1/4
E: Nitrogen; F: Oxygen
1st IE of N: N(1s22s22p3) → N+ (1s22s22p2)
1st IE of O: O(1s22s22p4) → O+ (1s22s22p3)
Conclusion: The 1st IE of O is lower than the 1st IE of N as less energy is required to remove the 2p electron from the paired electrons in 2p orbital (inter-electronic repulsion). E > F.
2nd IE of N: N+ (1s22s22p2) → N2+ (1s22s22p1)
2nd IE of O: O+(1s22s22p3) → O2+ (1s22s22p2)
Conclusion: The 2nd IE of O is higher than the 2nd IE of N as both involves the removal of 2p electron from singly filled p-orbital. However, the removal of the 2p electron from O+ will experience a greater electrostatic forces of attraction from the nucleus than that of N+ as O+ has greater nuclear charge (+8) than N+ (+7). E < F
Ans D

Q64 NJC09/32

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A-Level Maths Tuition Singapore/H2 Maths Tuition/JC Maths Tutor

Hi JC/A-Level Mathematics Tuition Students Singapore

4 common errors in Normal Distribution

1) Remember to sq root your variance when using GC
2) For two independent events, variance is always ADD
3) 2X + 3Y, remember to square the number 2 and 3 when finding the variance
4) X1 + X2 + X3, when finding the variane, just add them together

Cheers!
From A-level/JC/H2 Mathematics Tutor

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