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  1. book worm

    Physics P1 and P2: Discussi0n

    I donot want to make this post because its just silly that we are fighting over some stupid mcqs however, zishi, the question asked that which part of the graph showed the limit of proportionality which was P. if it had asked that in which region/part of the graph Hooke's Law was obeyed then it...
  2. book worm

    Physics P1 and P2: Discussi0n

    thank you farrukh.. this was what i was searching for that you found. The change is from P.E to Heat/Internal Energy/Thermal Energy/K.E of AIR acording to the marking scheme
  3. book worm

    Physics P1 and P2: Discussi0n

    yes... the potential energy is consumed against work against friction(air resistance) this increases the temperature of air
  4. book worm

    Physics P1 and P2: Discussi0n

    could you please repeat the question then?
  5. book worm

    Physics P1 and P2: Discussi0n

    no jafar it was that which point marks the limit of proportionality
  6. book worm

    Physics P1 and P2: Discussi0n

    it was 18 cm above limit of proportionality was P
  7. book worm

    Physics P1 and P2: Discussi0n

    what momen said is not true tell me that if the P.E is being converted to K.E at a constant rate, even then the K.E is not increasing but remaining the same.That means that the K.E is also being converted to Heat. They asked for PRINCIPLE CHANGE which would then be P.E to Heat
  8. book worm

    Physics P1 and P2: Discussi0n

    experiment could also be designed using variable resistor, you lower its resistance, current increases and temperature arises, resistance of resistor increases
  9. book worm

    Physics P1 and P2: Discussi0n

    just wanted to add that LOSS IN P.E= GAIN IN K.E + HEAT ( work done against friction) That is for a surface offering friction
  10. book worm

    Physics P1 and P2: Discussi0n

    i agree with jafar aur jahan tak jal kar rakh honay ki bat hai to thori heat generate hoti hai to environment may lose ho jati hai.. laikin agar bauhat door say koi cheez giray to sirf tab hi jalti hai.. moreover remember that LOSS IN P.E=GAIN IN K.E (only when the surface is smooth or there...
  11. book worm

    tension man

    normally for Maths,Physics,Chemistry and Biology 90th percentile is usually about 85 percent marks 75 for the languages i.e. English and Urdu (First Language I mean) 80 for Pak studies and Islamiyat Its just a rough estimate but usually remains around these figures
  12. book worm

    Physics P1 and P2: Discussi0n

    it is earthed because during refueling opposite charges may develop in fuel and aeroplane due to friction. this may lead to fire or explosion and therefore to prevent it earthing is done..
  13. book worm

    Chem P1 and P2: DiscussiOn

    catalysts do take part in reactions because 1) they increase the speed of reaction 2) they form intermediate products i am confused between organic and inorganic catalyst's option and the one about increasing the speed of forward reaction i do not know of any organic catalyst for reversible...
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