关于第25届IYPT的物理题目,求灵感
2.Cuttingtheair
Whenapieceofthread(e.g.,nylon)iswhirledaroundwithasmallmassattachedtoitsfreeend,adistinctnoiseisemitted.Studytheoriginofthisnoiseandtherelevantparameters.
5.Brightwaves
Illuminateawatertank.Whentherearewavesonthewatersurface,youcanseebrightanddarkpatternsonthebottomofthetank.Studytherelationbetweenthewavesandthepattern.
6.Woodpeckertoy
Awoodpecker(啄木鸟)toy(seepicture)exhibitsanoscillatory(振动的)motion(移动,动作).Investigateandexplainthemotionofthetoy.
8.Bubbles
Isitpossibletofloatonwaterwhentherearealargenumberofbubblespresent?Studyhowthebuoyancy(浮力)ofanobjectdependsonthepresenceofbubbles.
9.Magnetandcoin
Placeacoinverticallyonamagnet.Inclinethecoinrelativetothemagnetandthenreleaseit.Thecoinmayfalldownontothemagnetorreverttoitsverticalposition.Studyandexplainthecoin'smotion.
10.Rockingbottle
Fillabottlewithsomeliquid.Layitdownonahorizontalsurfaceandgiveitapush.Thebottlemayfirstmoveforwardandthenoscillatebeforeitcomestorest.Investigatethebottle'smotion.
(大家给点灵感我,这些实验肿么做?请给出需要的器材.打的好的都给分~)