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  1. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    I certainly hope so! >__<
  2. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    Please refer to the answers above, it's basically just rearranging the equation. This is one of the few questions I'm actually confident about.
  3. BumbleBEA

    So how was paper 3 biology........answers posted here

    An A* is higher than an A. If you only get A's and below, you cannot average higher than an A. Perhaps the grading system in your school is different?
  4. BumbleBEA

    So how was paper 3 biology........answers posted here

    No, you can't. A B, and two A's cannot make an A*... not even one of the components was an A*. The best for those scores is an overall A.
  5. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    Smart? You flatter me~<3 :)
  6. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    OH MY GOD! A COMMUTATOR. Darnit! :( I completely forgot....
  7. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    Nope. 40 degrees. Measure the angle of incidence relative to the normal. 90=50=40 :P
  8. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    That's a shame, but I'm sure you'll get some effort marks! :) I made quite careless mistakes as well. :( For the lightbulb question, I made it all the way until 40-31.7, and my idiot self calculates wrong and wrote: 40=31.7=9.3 <---FOR THE LOVE OF GOD, WHY?! Haha... so I put 9. What a...
  9. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    No... I don't think so. :( Refer to my answer to some other person above/in a previous page. Note: n=1/sin 40=1.56 (3 significant figures)
  10. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    Oh :) I'm not wholly sure but since there was to visible change, I said that they made the depth of water in both areas equal so that no refraction would take place :P That was a tough paper... hope I get an A* :D (call me Asian, but yeah ;) )
  11. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    What was the question? Haha! :D
  12. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    The answer was CD, if memory serves me right, because waves in shallow water are faster than in deep water. From a slow to a fast medium, it refracts AWAY from the normal. From a fast to a slow medium, it refracts TOWARDS the normal. Note: I don't remember the numbers, but... Power=VI...
  13. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    I'm afraid not. The answer is indeed 1.56, approximately. *refractive index of air=1* refractive index 1 x sin theta 1= refractive index 2 x sin theta 2 The angle of incidence from the air to the glass was 90 degrees, and the angle of refraction once it entered the glass was 40 degrees...
  14. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    That was the approximate answer to the question prior. :P
  15. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    The counter weight was 0.6kg according to my calculations. :)
  16. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    We can hypothesize that background radiation is approximately 14 since that's the minimum y-axis measurement when the sample was no longer emitting radiation (where the graph leveled out).
  17. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    I think you forgot to take into account the background radiation present. That was my first answer :P
  18. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    It rotates anticlockwise, because if you measured the distances of the forces from the pivot, the anticlockwise moment of force worked out to be about 0.44Nm, whilst the clockwise force was 0.30-something Nm. :)
  19. BumbleBEA

    Physics Pp:3-Variant 2- Discussing Answers!!

    The half life actually IS 1.6 days. The count rate started at 52, so yes you deduct background radiation which is 14. 52-14=38 The half life of the sample means that the rate count for the radiation emitted by the sample should halve 38/2=19 Thus, you must deduct 19 from the initial count rate...
  20. BumbleBEA

    So how was paper 3 biology........answers posted here

    It's called nitrogen fixation (done by nitrogen-fixing bacteria found in the roots of legumes such as beans, peas, etc...). :)
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