19o.
International Young Physicists´ Tournament
IYPT2006 - Bratislava - Republic of Slovak
1.Froth
Investigate the nature of the decay in height of the 'froth'
or 'foam' on a liquid. Under what conditions does the froth
remain for the longest time?
2.
Shades
If small non-transparent objects are illuminated with light,
patterns in the shadows are observed. What information can
be obtained about these objects using these patterns?
3.
Duck's cone
If one looks at the wave pattern produced by a duck paddling
across a pond, this reminds one of Mach's cone. On what parameters
does the pattern depend?
4.
Whispering Gallery
The Whispering Gallery at St Paul's Cathedral in London, for
example, is famous for the fact that the construction of the
circular gallery makes a whisper against its walls on one
side of the gallery audible on the opposite side of the gallery.
Investigate this phenomenon.
5.Probability
A coin is held above a horizontal surface. What initial conditions
will ensure equal probability of heads and tails when the
coin is dropped and has come to rest?
6.
Wet cleaning
A wet rag is hard to drag when it is spread out and pulled
across the floor. What does the resistive force depend on?
7.
Airglider
A paper sheet is on a table. If one blows along the table
the sheet begins to glide over it. Determine the flight characteristics
of the paper.
8.
Electrostatics
Propose and make a device for measuring the charge density
on a plastic ruler after it has been rubbed with a cloth.
9.
Sound and foam
Investigate the propagation of sound in foam.
10.
Inverted pendulum
It is possible to stabilise an inverted pendulum. It is even
possible to stabilise an inverted multiple pendulum (one pendulum
on top of the other). Demonstrate the stabilisation and determine
on which parameters this depends.
11.Singing
tube
A tube open at both ends is mounted vertically. Use a flame
to generate sound from the tube. Investigate the phenomenon.
12.Rolling
magnets
Investigate the motion of a magnet as it rolls down an inclined
plane.
13.
Sound
Measure the speed of sound in liquids using light.
14.
Cellular materials
Investigate the behaviour of a stream of fluid when it strikes
the surface of a sponge-like material.
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