2018年IYPT竞赛题目

《2018年IYPT竞赛题目》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、Problemsforthe31st IYPT20181.InventYourselfConstructasimpleseismographthatamplifiesalocaldisturbancebymechanical,opticalorelectricalmethods.Determinethetypicalresponsecurveofyourdeviceandinvestigatetheparametersofthedampingconstant.Whatisthemaximumamplificationthatyoucanachi

2、eve?1、自己发明构造简单的地震仪，通过机械，光学或电气方法放大局部扰动。确定设备的典型响应曲线，并探究阻尼常数的参数。你可以实现的最大放大倍数是多少？2.ColourofPowders                          Ifacolouredmaterialisgroundtoapowder,insomecasestheresultingpowdermayhaveadifferentcolourtothatoftheoriginalmaterial.Investigatehowthedegreeofgrindingaffec

3、tstheapparentcolourofthepowder.2、粉末的颜色如果将有色材料研磨成粉末，则在某些情况下，所得到的粉末可能具有与原始材料不同的颜色。探究研磨程度如何影响粉末的表观颜色。3.DancingCoinTakeastronglycooledbottleandputacoinonitsneck.Overtimeyouwillhearanoiseandseemovementsofthecoin.Explainthisphenomenonandinvestigatehowtherelevantparametersaffectthe

4、dance.3、跳舞的硬币拿一个强烈冷却的瓶子，把一个硬币放在瓶颈处。过一会儿你会听到一个噪音，并看到硬币运动。解释这个现象，并探究相关参数如何影响舞蹈。4.Heron'sFountainConstructaHeron’sfountainandexplainhowitworks.Investigatehowtherelevantparametersaffecttheheightofthewaterjet.4、海伦的喷泉构造海伦喷泉并解释它的形成原理。探究相关参数如何影响水柱的高度。5.DrinkingStrawWhenadrinkingstra

5、wisplacedinaglassofcarbonateddrink,itcanriseup,sometimestopplingovertheedgeoftheglass.Investigateandexplainthemotionofthestrawanddeterminetheconditionsunderwhichthestrawwilltopple.5、吸管当将一根吸管放在一杯碳酸饮料中时，它可能会升高，有时会也翻倒在杯沿上。研究和解释吸管的动作，确定吸管倒伏的条件。6.RingOilerAnoiledhorizontalcylindr

6、icalshaftrotatesarounditsaxisatconstantspeed.Makearingfromacardboarddiscwiththeinnerdiameterroughlytwicethediameteroftheshaftandputtheringontheshaft.Dependingonthetiltofthering,itcantravelalongtheshaftineitherdirection.Investigatethephenomenon.6、环形润滑器涂有油的水平圆柱轴以恒定速度绕其轴线旋转。用纸板

7、制成一个圆环，内径大约是轴直径的两倍，并将环放在轴上。依赖于环的倾斜，它可以沿轴向某一方向行进。研究此现象。7.ConicalPilesNon-adhesivegranularmaterialscanbepouredsuchthattheyformacone-likepile.Investigatetheparametersthataffecttheformationoftheconeandtheangleitmakeswiththeground.7、锥形桩用非粘性颗粒材料可以浇筑形成圆锥形桩。研究影响锥体形成的参数及其与地面的角度。8.Cus

8、psinaCylinderAhorizontalcylinderispartiallyfilledwithaviscousfluid.Whenthec