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  1. A

    Physics, Chemistry and Biology: Post your doubts here!

    Anyone sitting for computer paper 2 tomorrow?
  2. A

    Physics, Chemistry and Biology: Post your doubts here!

    My paper was 16 pages long, relatively easy paper , the half life was slightly annoying though. Theory questions were there. Numerics were not as much , like 40% calculations and the rest theory.
  3. A

    Physics, Chemistry and Biology: Post your doubts here!

    If you were able to extrapolate the graph until 0.10MPa , you would see that the volume will be 2 m^3.
  4. A

    Physics, Chemistry and Biology: Post your doubts here!

    Take a point from the graph. A wholesome point. I took the point (0.10,2). Now, I have a value for pressure and a value for volume. The question asks us to determine the volume at 0.10 MPa . We know P1*V1=P2*V2 . Substituting gives us 2*0.10=0.10*V2 V2=2 m^3
  5. A

    Physics, Chemistry and Biology: Post your doubts here!

    This question, for some reason, I found it incredibly mind-boggling. The helium in the cylinder has a volume of 6.0 × 10^–3 m3^-1 (0.0060 m^3) and is at a pressure of 2.75 × 10^6 Pa. (i) The pressure of helium in each balloon is 1.1 × 10^5 Pa. The volume of helium in an inflated balloon is 3.0...
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    Physics, Chemistry and Biology: Post your doubts here!

    I once saw a classified collection of physics questions. I didn't save the link, and I lost it. I need it for the momentum questions. If you know of any website or link please post it. I really need it. Thank you.
  7. A

    Physics, Chemistry and Biology: Post your doubts here!

    Yes. Why am I not in bed? Goodbye and good luck .
  8. A

    Physics, Chemistry and Biology: Post your doubts here!

    4 marks.
  9. A

    Physics, Chemistry and Biology: Post your doubts here!

    Your part (ii) is so wrong , it makes me want kill myself. Just kidding , no offense. Wait, I will send in the solution. Extremely complicated question just for 4 marks. BTW where are you going to sit for the exam? Ibn Khaldun?
  10. A

    Physics, Chemistry and Biology: Post your doubts here!

    Apparently , the HARDEST question to ever come in IGCSE physics according to my teacher. 100% of students have failed to solve this question.
  11. A

    Physics, Chemistry and Biology: Post your doubts here!

    It was my pleasure, you are welcome. There was also another question. It was about some gas trapped in a syringe. The syringe's piston was not sealed i.e. it could move. The question was when the temperature is increased , state the effect on the pressure of the gas. Took me some time to get my...
  12. A

    Physics, Chemistry and Biology: Post your doubts here!

    I found a reasonable, or more so, a correct explanation. You see, 16.3 g of ice melted due to the heat from the heater and the surrouding as well. For the further 2 minutes, it was just to show how much ice would melt due to energy from the surroundings only. Therefore, the actual mass of ice...
  13. A

    Physics, Chemistry and Biology: Post your doubts here!

    No, it will give you the wrong answer. The correct answer is (40*120)/(16.3-2.1) = 338.
  14. A

    Physics, Chemistry and Biology: Post your doubts here!

    I must be really dumb to not get this. 16.3 g of ice melted due to the energy supplied from the heater. It was switched off , 2 minutes later 2.1 g of ice melted (correct me if I am wrong, the 2.1 g of ice melted due to energy from the surroundings, right?). I do understand that the latent heat...
  15. A

    Physics, Chemistry and Biology: Post your doubts here!

    Yes but the thing is why do they subtract 2.1 g from 16.3 g ? I need an explanation for this. How is 2.1 g related to 16 .3 g?
  16. A

    Physics, Chemistry and Biology: Post your doubts here!

    Guys, question from physics CIE 0625/31/O/N/2008 , 5(c)(i) Using a 40W heater, 16.3 g of ice is melted in 2.0 minutes. The heater is then switched off. In a further 2.0 minutes, 2.1 g of ice is melted. Calculate the value of the specific latent heat of fusion of ice from these results.
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