Problems for the 2009 US Invitational YPT

USAYPT Members have access to "Guides" that the International Coaches
produce for each of these problems. The Guides are introductions to the
problems in both theory and experiment for beginning teachers.

The Guides cannot be shared with students (see the
Requirements and Guidelines for Professional Conduct).
Members must complete the security acknowledgement
statement in order to obtain a password to the guide web
pages. Contact the Secretary, USAYPT to start this process.

 

1. Probability: A coin is held parallel to and above a horizontal surface. What initial conditions will ensure an equal probability of a heads and tails when the coin is dropped and comes to rest?

2. Magnetohydrodynamics:  A shallow vessel contains a liquid. When an electric and a magnetic field are applied, the liquid can start moving. Investigate this phenomenon and suggest a practical application.

3. Fluid Lens: Develop a fluid lens system with an adjustable focus. Investigate the quality and possible applications of your system.

4. Ice Bulge: Fill a plastic tray or tub with water. When frozen, under certain conditions, a bulge can appear on the surface. Investigate this phenomenon.