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  1. S

    A2 Physics | Post your doubts here

    pixel intensity
  2. S

    A2 Physics | Post your doubts here

    quick joke which you most understand, how many polar orbits of an overhead satellite is required before the start of your exam? Show ur working :D TIPS :- Revise definitions! Quick read of the syllabus! Quicky notes! Revise only hard questions from the latest past papes! Have a kit-kat and...
  3. S

    A2 Physics | Post your doubts here

    I just checked again, primary current and voltage on primary coil are out of phase by 90 degrees. This is because current is a followup of the voltage, where voltage leads by 90 degrees. you really dont need to know abt it. secondary emf is out of phase (180 degrrees ) compared to primary emf...
  4. S

    A2 Physics | Post your doubts here

    haha yes I also have an awkward left alone feeling when everybody goes to sleep haha. But you and I have to get some if we want to pass hehe :D
  5. S

    A2 Physics | Post your doubts here

    ok how about ci) 50.00 + 273.15 = 323.15 why not 323.2 , shouldnt it be 4 s.f??? because the values given are 4 s,f. WHy is the answer 5 s,f?
  6. S

    A2 Physics | Post your doubts here

    yeah, true. dunno whats wrong with me lol . thanks ;) Question 2 a ) please?
  7. S

    A2 Physics | Post your doubts here

    becuase it will pass through twice so 0.389 ^ 2 , and 0.331 percent is reflected back
  8. S

    A2 Physics | Post your doubts here

    November 2011 / 43 / Question 2 a) I thought the question said they were calibrated correctly. Please explain both points in mark scheme! Question 1 b) When do we use g.p.e = k.e and Fg = centripetal force. If we used weight = centripetal force here, why wouldnt it work?
  9. S

    A2 Physics | Post your doubts here

    Whats the answer, how did you solve it. I think you need the thermistor resistace?
  10. S

    A2 Physics | Post your doubts here

    you need more energy to make work against atmosphere when the gas is expanding, plus you need more thermal energy to break intermolecular forces.
  11. S

    A2 Physics | Post your doubts here

    dont worry, for paper 4 , if you get 49/100 you get an A! so technically, if you fail, you will pass. So dont worry ! :D We have an exam tomorrow?????????? :eek: :p
  12. S

    A2 Physics | Post your doubts here

    ehh, im not saying that graph is wrong, im asking question {not been addressed :( } The decreasing gradient of the current, look at the y-values of the emf. If the y values of emf is decreasing, then the gradient of current is decreasing. However, the RATE of the DECREASE of the gradient will...
  13. S

    A2 Physics | Post your doubts here

    Although I had the same answer, I do not think it is acceptable, check my post to smzimran.
  14. S

    A2 Physics | Post your doubts here

    I know the answer drawn is correct but Let me comment on something, 1-How do you know if the rate of decrease is decreasing or constant or increasing? -Please note that emf is the Numerical value of the rate of change of flux, so in both graphs the rate of change of flux is decreasing. But what...
  15. S

    A2 Physics | Post your doubts here

    which year is this?
  16. S

    A2 Physics | Post your doubts here

    check 4c again please
  17. S

    A2 Physics | Post your doubts here

    :cry: :cry: :cry:
  18. S

    A2 Physics | Post your doubts here

    June 2002 6 a) and please check 4 c) too!
  19. S

    A2 Physics | Post your doubts here

    yes to break intermolecular forces.
  20. S

    A2 Physics | Post your doubts here

    melting does very smaall/ negligible work against atmosphere. So i think its only boiling.
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