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IYPT |
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Resolution
of the IYPT 2003 problems:
All files are
in english and PDF Acobe Acrobat Reader format, that will
can get it here:
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1.
Misty
Invent and construct a device that would allow the size
of a droplet of a mist to be determined using a sound
generator.
German
resolution
Polish
resolution |
2.
Stubborn Ice
Put a piece of ice (e.g. an ice cube) into a container
filled with vegetable oil. Observe its motion and make
a quantitative description of its dynamics.
Brazillian
resolution
German
resolution
Polish
resolution |
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?
Brazillian
resolution
German
resolution
Polish
resolution |
4.
Dusty Blot
Describe and explain the dynamics of the patterns you
observe when some dry dust (e.g. coffee powder or flour)
is poured onto a water surface. Study the dependence of
the observed phenomena on the relevant parameters
Brazillian
resolution
German
resolution
Polish
resolution |
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.
Brazillian
resolution
German
resolution
Polish
resolution |
6.
Seebeck Effect
Two long metal strips are bent into the form of an arc
and are joined at both ends. One end is then heated. What
are the conditions under which a magnetic needle placed
between the strips shows maximum deviation?
Brazillian
resolution
German
resolution
Polish
resolution |
7.
Coin
Stand a coin on its edge upon a horizontal surface. Gently
spin the coin and investigate the resulting motion as
it settles.
Brazillian
resolution
German
resolution
Polish
resolution |
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?
Brazillian
resolution
German
resolution
Polish
resolution |
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.
Brazillian
resolution
Polish
resolution |
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.
Brazillian
resolution
German
resolution
Polish
resolution |
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.
Brazillian
resolution
German
resolution
Polish
resolution |
12.
Kundt’s Tube
In a ‘Kundt’s Tube’ type of experiment
the standing waves produced can be made visible using
a fine powder. A closer look at the experiment reveals
that the regions of powder have a sub-structure. Investigate
its nature.
Polish
resolution |
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.
Brazillian
resolution
German
resolution
Polish
resolution
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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.
Brazillian
resolution
German
resolution |
15.
Brazil Nut Effect
When a granular mixture is shaken the larger particles
may end up above the smaller ones. Investigate and explain
this phenomenon. Under what conditions can the opposite
distribution be obtained?
Brazillian
resolution
German
resolution |
16.
Small Fields
Construct a device based upon a compass needle and use
your device to measure the Earth’s magnetic field.
Brazillian
resolution
German
resolution |
17.
Didgeridoo
The ‘didgeridoo’ is a simple wind instrument
traditionally made by the Australian aborigines from a
hollowed-out log. It is, however, a remarkable instrument
because of the wide variety of timbres that it produces.
Investigate the nature of the sounds that can be produced
and how they are formed
Brazillian
resolution
German
resolution |
