LIONS Home Tutors

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O level Islamiat and pak studies notes

Co-ordinate geometry Everyday maths Numbers Standard forms number - patterns Simultaneous equations Variations Trigonometry Properties of circle Matrices

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Ppl are asking about star formation so here is it: 1. After the big bang there was "dust" everywhere with hydrogen. 2. These dust clouds are called nebula. 3. V know that more mass creates more "deep" curvature in space time known as gravity. 4. So the concentrated dust and hydrogen particles had more gravity than others. 5. Thus they attract the dust and hydogen particles. 6. A lot of hydrogen particles came together creating immense gravity. 7. The gravity forced the hydogen atoms to fuse together and form a heavier element known as helium. 8. This fusion caused a lot of energy being produced in the form of light and heat. 9. This tremedous energy also produced presure which makes the star to go "outwards". 10. On the other hand, the gravity makes the star to go "inwards". 11. Thus a stable shape and structure of a star is created which is kind of round. 12. The star continue its life. PHASES OF ITS LIFE: 13. Eventually the fuel i...

5054/22 Resource material Physics Formula sheet by Sir Hakeem https://drive.google.com/open?id=1vhyGjUo-e9OW_t45n6YQpGwW0712ilFR Flash cards https://drive.google.com/open?id=1p-pIprwzX-cL6e6gcTSDBf6wnWiwuvwp Folder for physics (Notes, past papers and ECR and some topical questions) https://drive.google.com/open?id=1Jf0mpg9uvRlnrHp3vGduZFLJ3jJUmTih Leaner guide https://drive.google.com/open?id=10ofgsz6S6s_Agjb6DEvRfkSpWm3h09Kl For this exam, your concepts should be clear, especially for light, electricity, magnetism, electromagnetism and electromagnetic induction. Again practice recent years past papers, especially 17-18.. You can also attempt from topical to strengthen your weak subs Paper 2 Tips - Structured Questions Read all the three questions in section B before you make your choice of which two questions to answer. Some students find it better - to read through the whole paper before they start writing any answers at all - to start answering section B with the que...

5070/42 Answers Q1)Table: 23.6, 0.3 Tick on 23.6 and 23.8 Mean 23.7 Moles of HCl: 0.01398 Moles of Magnesium Hydroxide: 0.00699 Mass of Mg(OH)2: 0.405(42) Mass of Milk Of Magnesia : 11.7 % = 3.46~ Q2) Chromatography se karna tha Electro Chemistry: Cathode: pink deposits Anode : Colorless gas. Observation with inert: blue color fades away COLOR CHANGE WITH Cu electrodes: No change. Mass of Anode Decrease Mass of Cathode increase Graph Question: Color Change of Sol; Colorless to Brown Q) Why did addition of CaCO3 stopped rxn. A) Acid was nuetralized... Anomalous Point : 100,11.0 Volume: 13.0~15.0 (Depends on Graph) Time : 85~95 (Again Depends on Graph) The gradient at 50s was steeper than At 400s Reason : More molecules, more effective collision, high Rate of Reaction. PREPARATION OF SALTS: a) 1. Excess CuCO3 in Sulfuric acid. 2.Heat/Stir 3.Filter 4. CRYSTALLISATION 5. WASH AND DRY. b) 1. Silver Nitrate + Ammonium Chloride 2. Mix, Stir. 3. Filter 4. Wa...