IGCSE COLOUR THEORY GOOD VIDEOS

https://youtu.be/tiqiN3y1ze4?si=l4EcsHAfhhkzwple

REFRACTION - CRITICAL ANGLE

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https://youtu.be/NAaHPRsveJk?si=y_c9gVy2px_GXBUz

TOTAL INTERNAL REFLECTION

https://youtu.be/ybvjcjndn_4?si=Hmcgn7ndFHNcHTWa

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COLOUR THEORY

https://youtu.be/S9T0V5Mh01g?si=M68YV-1A4ccOxeI9

https://youtu.be/xvfwuImlkrA?si=lcPbiSx_-8aOLdrV

Opaque Object Colors Under Different Light

https://youtu.be/_goD-vZdgg8?si=LporqN_BVojZgmJv

What is the Colour of the object in different coloured lights? (PART-1)

https://youtu.be/Hzmx2cQZhU0?si=gNDgLKgMquqhhlfA

What is the Colour of the object in different coloured lights? (PART-2)

https://youtu.be/BB-A1tn8MCk?si=hxuIq9bYOodR80Sy

SCALAR AND VECTOR QUANTITIES | CONCEPT AND EXAMPLES

Scalar Quantities

Scalar quantities have only magnitude (size or amount) and no direction.

Here are 10 examples:

1. *Temperature* - Example: 25 degrees Celsius.

2. *Speed* - Example: 60 kilometers per hour (km/h).

3. *Mass* - Example: 50 kilograms (kg).

4. *Time* - Example: 30 seconds.

5. *Volume* - Example: 2 liters (L).

6. *Distance* - Example: 10 meters (m).

7. *Energy* - Example: 100 Joules (J).

8. *Density* - Example: 1.2 grams per cubic centimeter (g/cm³).

9. *Electric charge* - Example: 2 Coulombs (C).

10. *Area* - Example: 20 square meters (m²).

Vector Quantities

Vector quantities have both magnitude and direction. Here are 10 examples:

1. *Velocity* - Example: 50 km/h east.

2. *Force* - Example: 10 Newtons (N) upward.

3. *Displacement* - Example: 5 meters north.

4. *Acceleration* - Example: 2 meters per second squared (m/s²) to the right.

5. *Momentum* - Example: 20 kg·m/s south.

6. *Electric field* - Example: 3 Newtons per Coulomb (N/C) downward.

7. *Magnetic field* - Example: 0.5 Tesla (T) towards the west.

8. *Weight* - Example: 500 Newtons downward (due to gravity).

9. *Torque* - Example: 15 Newton meters (N·m) clockwise.

10. *Lift* - Example: 800 Newtons upward (as in an airplane's lift).

*Scalars*:

- Scalars are like counting objects or measuring something without worrying about which way it's going. For example, if you measure the temperature of the room, you only care about how hot or cold it is, not which direction the heat is coming from.

*Vectors*:

- Vectors are like giving directions with measurements. For example, if you tell someone to walk 10 meters north, you are giving them both a distance and a direction to follow. Both parts (the distance and the direction) are important to understand what you mean.

These examples should help you understand the difference between scalar and vector quantities. Scalars are simpler because they only have a size, while vectors are more detailed because they tell you both size and direction.

Questions based on Homologous series | HydroCarbons | Organic Chemistry

a) ‘Homologous series’ are prevalent for organic compounds and not for inorganic compounds.

Homologous series are characteristic of organic compounds because these compounds are based on carbon chains. In a homologous series, each member differs from the next by a CH₂ unit. This regularity in structure leads to a gradual variation in physical properties and similar chemical properties among the members. Inorganic compounds, on the other hand, do not form such series because their structures are more varied and less amenable to the regular incremental changes seen in organic compounds.

b) Methane, ethane and propane have similar chemical properties but differ in physical properties.

Methane (CH₄), ethane (C₂H₆), and propane (C₃H₈) are all alkanes, which are saturated hydrocarbons. They have similar chemical properties because they all undergo similar types of reactions, such as combustion and substitution, due to the presence of only single bonds between carbon atoms. However, they differ in physical properties such as boiling and melting points. These differences arise because as the molecular size increases, the strength of van der Waals forces between the molecules increases, leading to higher boiling and melting points for larger molecules.

c) Hydrocarbons of the same homologous series have the same general formula.

Hydrocarbons in the same homologous series share a common general formula, which describes the ratio of carbon to hydrogen atoms in the molecules. For example:
- Alkanes have the general formula (CnH{2n+2} -- Alkanes (paraffins)
- Alkenes have the general formula (CnH{2n} --- Alkenes (olefins)
- Alkynes have the general formula (CnH{2n-2}
This general formula is a result of the consistent structural pattern within the series, where each successive compound differs by a CH₂ group.

ORGANIC CHEMISTRY TEST/NOMENCLATURE TEST

5.4÷1.2 + 0.0072÷0.72 =

Substitution method system of linear equations examples worksheet

Substitution method system of linear equations examples worksheet

PRACTICE QUESTION
SOLUTIONS

DIVISIBILITY RULES OF 2 , 3 AND 5 - WITH PRACTICE QUESTIONS AND SOLUTIONS - worksheet

DIVISIBILITY RULES OF 2 , 3 AND 5 - WITH PRACTICE QUESTIONS AND SOLUTIONS

1. Is 246 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 6)

- 3: Yes (2 + 4 + 6 = 12, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

2. Is 315 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: Yes (3 + 1 + 5 = 9, which is divisible by 3)

- 5: Yes (last digit is 5)

3. Is 450 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: Yes (4 + 5 + 0 = 9, which is divisible by 3)

- 5: Yes (last digit is 0)

4. Is 234 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 4)

- 3: Yes (2 + 3 + 4 = 9, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

5. Is 1230 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: Yes (1 + 2 + 3 + 0 = 6, which is divisible by 3)

- 5: Yes (last digit is 0)

6. Is 700 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: No (7 + 0 + 0 = 7, which is not divisible by 3)

- 5: Yes (last digit is 0)

7. Is 899 divisible by 2, 3, and/or 5?

- 2: No (last digit is 9)

- 3: No (8 + 9 + 9 = 26, which is not divisible by 3)

- 5: No (last digit is not 0 or 5)

8. Is 482 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 2)

- 3: No (4 + 8 + 2 = 14, which is not divisible by 3)

- 5: No (last digit is not 0 or 5)

9. Is 255 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: Yes (2 + 5 + 5 = 12, which is divisible by 3)

- 5: Yes (last digit is 5)

10. Is 612 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 2)

- 3: Yes (6 + 1 + 2 = 9, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

11. Is 1475 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: No (1 + 4 + 7 + 5 = 17, which is not divisible by 3)

- 5: Yes (last digit is 5)

12. Is 204 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 4)

- 3: Yes (2 + 0 + 4 = 6, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

13. Is 810 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: Yes (8 + 1 + 0 = 9, which is divisible by 3)

- 5: Yes (last digit is 0)

14. Is 76 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 6)

- 3: No (7 + 6 = 13, which is not divisible by 3)

- 5: No (last digit is not 0 or 5)

15. Is 505 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: No (5 + 0 + 5 = 10, which is not divisible by 3)

- 5: Yes (last digit is 5)

16. Is 360 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: Yes (3 + 6 + 0 = 9, which is divisible by 3)

- 5: Yes (last digit is 0)

17. Is 143 divisible by 2, 3, and/or 5?

- 2: No (last digit is 3)

- 3: No (1 + 4 + 3 = 8, which is not divisible by 3)

- 5: No (last digit is not 0 or 5)

18. Is 528 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 8)

- 3: Yes (5 + 2 + 8 = 15, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

19. Is 935 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: No (9 + 3 + 5 = 17, which is not divisible by 3)

- 5: Yes (last digit is 5)

20. Is 286 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 6)

- 3: No (2 + 8 + 6 = 16, which is not divisible by 3)

- 5: No (last digit is not 0 or 5)

21. Is 144 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 4)

- 3: Yes (1 + 4 + 4 = 9, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

22. Is 175 divisible by 2, 3, and/or 5?

- 2: No (last digit is 5)

- 3: No (1 + 7 + 5 = 13, which is not divisible by 3)

- 5: Yes (last digit is 5)

23. Is 243 divisible by 2, 3, and/or 5?

- 2: No (last digit is 3)

- 3: Yes (2 + 4 + 3 = 9, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

24. Is 520 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 0)

- 3: No (5 + 2 + 0 = 7, which is not divisible by 3)

- 5: Yes (last digit is 0)

25. Is 396 divisible by 2, 3, and/or 5?

- 2: Yes (last digit is 6)

- 3: Yes (3 + 9 + 6 = 18, which is divisible by 3)

- 5: No (last digit is not 0 or 5)

Cambridge Physics Chemistry Coursebook IGCSE textbook text book

LINK FOR PHYSICS AND CHEMISTRY BOOKS

Strictly For personal Use

Unit Conversion A Middle School Guide with Step-by-Step Examples and Solved Questions

UNIT CONVERSION Notes

https://drive.google.com/file/d/1XvMHMNze3yEMSs5WLJsseXz-e6JG-Po5/view?usp=drive_link

Standard Form Drill

https://drive.google.com/file/d/1wIyCyfcEUGKiLb4iDPLdz8a58dZeOCOl/view?usp=drive_link

Welcome to our YouTube lecture on unit conversion tailored specifically for middle school students! In this comprehensive tutorial, we'll dive into the fundamental concept of converting units with easy-to-follow explanations, plenty of examples, and step-by-step solutions to solidify your understanding. We'll start by breaking down the basics of unit conversion, discussing why it's important, and exploring common units of measurement encountered in everyday life and in the classroom. From there, we'll guide you through a systematic approach to converting units, ensuring you grasp the process from start to finish. Throughout the lecture, we'll provide numerous real-life examples to illustrate each step of the conversion process. Whether we're converting lengths, volumes, , you'll learn practical strategies to tackle any conversion problem with confidence. But that's not all! To reinforce your learning, we'll work through a variety of solved questions together, applying the methods and techniques discussed earlier. Each solution will be presented in a clear, step-by-step manner, allowing you to follow along easily and understand the reasoning behind each calculation. By the end of this lecture, you'll have a solid grasp of unit conversion, equipped with the knowledge and skills to tackle any conversion problem thrown your way. Get ready to become a unit conversion master! Tags: unit conversion, middle school, measurement, math tutorial, step-by-step, examples, solved questions, practical math, educational video, math for kids, unit conversion explained, middle school math, mathematics, metric system, imperial system