Recent content by kiwikiwi79

  1. K

    Pendulum question~

    You are in an elevator at the top of the CN tower. You have a pendulum and allow it to oscillate. The elevator falls to the ground after someone cuts its support cables. What does the pendulum do? Ignore the air resistance acting on the pendulum and the elevator. Help please!!! o:)
  2. K

    Why is it difficult to measure the perihelion advance of the planet Venus? Help!

    Why is it difficult to measure the perihelion advance of the planet Venus? Please help me answer this question in details....Thank you~ :rofl:
  3. K

    Mathematica Mathematical Statistics~help please

    Mathematical Statistics~help please!! :cry: Please help me with these question... Let S and Y be i.i.d positive random variables with E(X)<infinity. Show that E(Y/S) is greater or equal to 1. Give an example where E(Y/X)=positive infinitiy... I have no Idea...
  4. K

    Canadian light source electromagnetic radiation

    newtoPF-how do you delete this thread? i wasn't sure about where to post.....sorry for double posting....but how do you delete this anyways....?
  5. K

    Electromagnetic radiation

    Please help me answer these questions~~~thank you~~ In October, 2004, the Canadian Light Source (CLS) was officially opened. This device is a synchrotron. It produces electromagnetic radiation that can be used to probe the structure of materials. 1. Explain how electric and magnetic fields...
  6. K

    Electromagnetic radiation and Canadian Light Source

    Please help me answer these questions~~~thank you~~ In October, 2004, the Canadian Light Source (CLS) was officially opened. This device is a synchrotron. It produces electromagnetic radiation that can be used to probe the structure of materials. 1. Explain how electric and magnetic fields...
  7. K

    Help pleeeese (validity of f=ma, mass of diff.temp objects)

    help pleeeese~~ (validity of f=ma, mass of diff.temp objects) :cry: please help me~ desperate... 1. is f=ma valid in all situations? explain your reasons~ 2. is the mass of a hot frying pan different from a cold frying pan? why? thank you~~~
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