<%@LANGUAGE="JAVASCRIPT" CODEPAGE="1252"%> olimpiada Brasileira de Física
 
edição 2004
 
 
 I n t r o d u ç ã o
The BGGS IYPTAustralia Challenge is a theoretical and practical research based competition for teams of 3 students, usually in their last year of high school.
It is a team competition.
Prospective teams can start training in July in preparation for the release of the tournament prolems in October.
You will need to research 10 problems and then present and defend their findings in "Physics Fights" as part of the BGGS IYPTAustralia Challenge Finals to be held in late April/early May at Brisbane Girls Grammar School.
 
 C o m o   d e v e   s e r   a   r e s o l u ç ã o
The final team of 5 students (the winning team at IYPTAustralia plus two selected outstanding individuals) will compete as the Australian Team at the International Young Physicists Tournament. In 2004 this will be in Australia in June and team members will need to have compiled reports to 17 problems (an additional seven problems) before ciming to Brisbane.

The best reports will include:
Introduction: Your interpretation of the problem including a consideration of all possible parameters
Experimental Research: explanation of the experiments you carried out and their significance to the problem. This should include graphical representations of your findings (not necessary to be detailed graph)
Theoretical Research: Should explain the basic theory behind the problem. It must have equations.
Discussion: Tying together the practical and theoretical findings to validate your solution or parts of your solution

The best presentations will also include:
Emphasis of points made: Powerpoint or OHT
Practical Support: Photographs, Video or demonstrations of experiments
Mathematical model: maths fitting experimental data and/or a computer simulation matching the data

Do not worry too much now. It is important that you start researching and design experiments quickly!!
 
  P r o b l e m a s   d e   2 0 0 3
1. (IYPT 3) Electric Pendulum
Use a thread to suspend a ball between the plates of a capacitor. When the plates are charged the ball will start to oscillate. What does the period of the oscillations depend on?

2. (IYPT 5) Sea-shell
When you put a sea-shell to your ear you can hear ‘the sea’. Study the nature and the characteristics of the sound.

3. (IYPT 7) Coin
Stand a coin on its edge upon a horizontal surface. Gently spin the coin and investigate the resulting motion as it settles.

4. (IYPT 8) Pebble Skipping
It is possible to throw a flat pebble in such a way that it can bounce across a water surface. What conditions must be satisfied for this phenomenon to occur?

5. (IYPT 9) Flow
Using a dc source, investigate how the resistance between two metallic wires dipped into flowing water (or water solution) depends upon the speed and direction of the flow.

6. (IYPT 10) Two Chimneys
Two chimneys stand on a box with one transparent side. Under each chimney there is a candle. A short period after the candles are lit one flame becomes unstable. Examine the case and present your own theory of what is happening.

7. (IYPT 11) String Telephone
How do the intensity of sound transmitted along a string telephone, and the quality of communication between the transmitter and receiver, depend upon the distance, tension in the line and other parameters? Design an optimal system.

8. (IYPT 13) Egg White
White light appears red when it is transmitted through a slice of boiled egg white. Investigate and explain this phenomenon. Find other similar examples.

9. (IYPT 14) Fountain
Construct a fountain with a 1m ‘head of water’. Optimise the other parameters of the fountain to gain the maximum jet height by varying the parameters of the tube and by using different water solutions.

10. (IYPT 16) Small Fields
Construct a device based upon a compass needle and use your device to measure the Earth’s magnetic field.

A. Allinson
Chair LOC Brisbane2004 and IYPTAustralia


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