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Recent content by PlanetMaster

  1. PlanetMaster

    Problem

    Can you please show your working? P.S. That's not even in the options :p
  2. PlanetMaster

    Physics: Post your doubts here!

    No worries pal. For both waves, we can take the points they intersect 0 displacement in the same direction. Like this:
  3. PlanetMaster

    Problem

    Given x = \sqrt{6 + \sqrt{6 + \sqrt{6 + ...}}} We can rewrite this as x = \sqrt{6 + x} as its iterating infinitely. Squaring both sides and equating to zero x^{2}-x-6=0 x^{2}-3x+2x-6=0 x(x-3)+2(x-3)=0 (x-3)(x+2)=0 x=3,-2 Therefore the answer is (b) 3 as we can't root a negative value.
  4. PlanetMaster

    Physics: Post your doubts here!

    During one oscillation, point A moves a distance of 80mm as given in the question. And during this one oscillation, point A would return to its original position. Any point would move a distance = 4 time the amplitude during one oscillation, . Remember, as defined above, the displacement is up...
  5. PlanetMaster

    Physics: Post your doubts here!

    You need to take intersections of both waves where they are going in the same direction. From the graph, these can be either 0 to 0.5 or it can be 0.5 to 0.8. We can then use ratios to calculate the phase difference \frac{\Delta t}{T} = \frac{\Delta \phi}{360^{\circ}} Since T is 0.8 i.e one...
  6. PlanetMaster

    Physics question.

    Effeciency is output power over input power. The input power is 12w. And since the motor "wastes" 590j of energy in 1 min, the power "wasted" can be calculated with E=P \times t P = \frac{E}{t} = \frac {590}{60} = 9.83 So output power is 12-9.83 = 2.17 And thus, Effeciency = \frac{output...
  7. PlanetMaster

    Introduction

    Hello Ebenezer, Welcome to XtremePapers! We hope you will enjoy the discussions and look forward to your participation. Feel free to ask questions and exchange answers on revision, exams, student life, or whatever is on your mind.
  8. PlanetMaster

    Introduction

    Hello Desire, Welcome to XtremePapers! We hope you will enjoy the discussions and look forward to your participation. Feel free to ask questions and exchange answers on revision, exams, student life, or whatever is on your mind.
  9. PlanetMaster

    Physics: Post your doubts here!

    It says decreases to 94%! If it were decreases by 94%, then we would subtract 0.94 from 1.
  10. PlanetMaster

    Physics: Post your doubts here!

    Resistance of wire R = \frac{ρL}{A} And cross sectional area A = \frac{πd^{2}}{4} When the wire is stretched, the diameter is reduced to 94%. This causes the area of stretched wire to be A_{s} = \frac{π(0.94d)^{2}}{4} = 0.8836(\frac{πd^{2}}{4}) = 0.8836A Volume of the wire is cross-sectional...
  11. PlanetMaster

    ILETS is necessary?

    Its hard to answer that as it varies greatly from country to country. I'd recommend speaking to a career counselor for that.
  12. PlanetMaster

    ILETS is necessary?

    There might be a few places where you might get an exemption but most likely IELTS would be required for Visa purposes.
  13. PlanetMaster

    ILETS is necessary?

    Yes, IELTS is compulsory if you are planning to study or work or immigrate in English speaking countries. Apart from English speaking countries, many other countries also accepts IELTS as International Standardized test of English Language proficiency for non-native English language speakers.
  14. PlanetMaster

    Mathematics: Post your doubts here!

    Its now available in our Papers section. Here are direct links to it: QP11: https://papers.xtremepape.rs/CAIE/O%20Level/Mathematics%20D%20(4024)/4024_w22_qp_11.pdf QP12: https://papers.xtremepape.rs/CAIE/O%20Level/Mathematics%20D%20(4024)/4024_w22_qp_12.pdf QP21...
  15. PlanetMaster

    Mathematics: Post your doubts here!

    We should have it in our Papers section in 2-3 days.
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