关于举行中国大学生物理学学术竞赛(CUPT)校内选拔赛的通知 [2013-11-14]

比赛办法：

　　要求4-5人组成一队，以团队形式完成2014年CUPT竞赛17道题目中的2道。要求必须亲手做实验，然后以ppt的形式，按照学术报告的要求。清晰而准确的表达自己的实验原理，实验内容，研究成果，强调原创性。

　　在2014年3月1日左右，物理学院组成评审小组，对各参赛团队进行评审。各参赛队伍以学术报告的形式，完整的向评委团展示自己的实验成果和理论分析，并且回答评委提问。评委会根据参赛队伍的表现评出一、二、三等奖。

实验经费及奖励：

　　小额（500以下）的实验材料采用发票报销的方式，即每月一次统一报销。大额的实验材料或器材需先向物理学院提交申请，经物理学院同意后方可借用或购买。

　　奖励：获得一等奖参赛团队将获得2000元的奖励，二等奖团队获得1000元的奖励,三等奖团队获得500元。其他参赛团队也将获得纪念奖励。物理学院将从优胜团队中挑选成员参加明年暑期在武汉华中理工大学举行的全国联赛。

实验场地：

　　由于学校用房紧张，实验场地请参赛队伍自行联系解决，必要时实验物理教学中心将提供协助。

组织和报名方式:

　　本项比赛物理学院委托“格物致知”社团具体组织，实验物理教学中心将给予实验方面的协助，物理学院指定几位老师进行指导。拟参赛同学请自主组成4至5人的团队，由队长发送全体队员学号+院系+姓名到13965049289； 13696547454进行报名，11,12,13级本科生均可报名，12月1日报名截止。

　　如有疑问可咨询13965049289（杨同学）； 13696547454（马同学）

比赛题目：

CUPT 2014

1. Invent yourself

It is known that some electrical circuits exhibit chaotic behaviour. Build a simple circuit with such a property, and investigate its behaviour.

2. Hologram

It is argued that a hologram can be hand made by scratching a piece of plastic. Produce such a ‘hologram’ with the letters ‘IYPT’ and investigate how it works.

3. Twisted rope

Hold a rope and twist one end of it. At some point the rope will form a helix or a loop.  Investigate and explain the phenomenon.

4. Ball sound

When two hard steel balls, or similar, are brought gently into contact with each other, an unusual ‘chirping’ sound may be produced. Investigate and explain the nature of the sound.

5. Loaded hoop

Fasten a small weight to the inside of a hoop and set the hoop in motion by giving it an initial push.  Investigate the hoop’s motion.

6. Bubble crystal

A large number of very small, similar air bubbles float on the surface of a soapy liquid. The bubbles will arrange themselves into a regular pattern similar to a crystalline lattice. Propose a method to obtain bubbles of a consistent size, and investigate the formation of such a bubble crystal.

7. Pot-in-pot refrigerator

The ‘pot-in-pot refrigerator’ is a device that keeps food cool using the principle of evaporative cooling. It consists of a pot placed inside a bigger pot with the space between them filled with a wet porous material, e.g. sand. How might one achieve the best cooling effect?

8. Freezing droplets

Place a water droplet on a plate cooled down to around -20 °C. As it freezes, the shape of the droplet may become cone-like with a sharp top. Investigate this effect.

9. Water bombs

Some students are ineffective in water balloon fights as the balloons they throw rebound without bursting. Investigate the motion, deformation, and rebound of a balloon filled with fluid. Under what circumstances does the balloon burst?

10. Coefficient of diffusion

Using a microscope, observe the Brownian motion of a particle of the order of micrometre in size. Investigate how the coefficient of diffusion depends on the size and shape of the particle.

11. Candle Power Plant

Design a device that converts the heat of a candle flame into electrical energy. Investigate how different aspects of the device affect its efficiency.

12. Cold balloon

As air escapes from an inflated rubber balloon, its surface becomes cooler to the touch. Investigate the parameters that affect this cooling. What is the temperature of various parts of the balloon as a function of relevant parameters?

13. Rotating saddle

A ball is placed in the middle of a rotating saddle. Investigate its dynamics and explain the conditions under which the ball does not fall off the saddle.

14. Rubber motor

A twisted rubber band stores energy and can be used to power a model aircraft for example. Investigate the properties of such an energy source and how its power output changes with time.

15. Oil stars

If a thick layer of a viscous fluid (e.g. silicone oil) is vibrated vertically in a circular reservoir, symmetrical standing waves can be observed. How many lines of symmetry are there in such wave patterns? Investigate and explain the shape and behaviour of the patterns.

16. Magnetic brakes

When a strong magnet falls down a non-ferromagnetic metal tube, it will experience a retarding force. Investigate the phenomenon.

17. Chocolate hysteresis

Chocolate appears to be a solid material at room temperature but melts when heated to around body temperature. When cooled down again, it often stays melted even at room temperature.  Investigate the temperature range over which chocolate can exist in both melted and ‘solid’ states and its dependence on relevant parameters.

Authors:

John Balcombe, Samuel Byland, ŁukaszGładczuk, Wee Wei Hsiung, Valery Koleboshin, AliaksandrMamoika, IlyaMartchenko, Othmar Marti, Martin Plesch, Rainer Reichle, Andrei Schetnikov, Erwin HandokoTanin, Kathryn Zealand

Problem selection committee: John Balcombe, Samuel Byland, IlyaMartchenko

Epigraph selected by EvgenyYunosov

比赛题目链接：

http://iypt.org/images/a/a8/problems2014.pdf