There will be no more hints for Problem 3.
By 1st April 2023, 13:00 GMT, there are 1264 participants from 91 countries. 62 solutions to P3 were submitted, out of which 18 were correct. Additionally, there are two correct solutions from guest participants, see below.
Submissions to Problem 3 are no longer accepted.
Correct solutions from guest participants.
Dobrica Jovanovic, a former Physics Cup winner, currently second year undergraduate student at MIT; solution submitted on 14th February 2023.
Thomas Foster, a former Physics Cup winner, currently a graduate student at Princeton University; solution submitted on 23rd February 2023.
Correct solutions by university students:
| Luka | Passek-Kumerički | Croatia | University of Zagreb | 17/2/23 20:32 |
| Anindya | Guria | India | Indian Institute of Science | 26/2/23 13:38 |
| Kerim | Cherkezov | Turkmenistan | Turkmen State University | 28/2/23 04:47 |
| Lukas | Schicht | Germany | University of Rostock | 4/3/23 18:29 |
| Alessio | Biccari | Italy | La Sapienza | 11/3/23 21:23 |
| Gil | Ronen | Israel | Hebrew University of Jerusalem | 12/3/23 09:04 |
| Konstantin | Tripunovski | North Macedonia | University of Ljubljana – Medical Faculty | 21/3/23 15:33 |
| Soumyadeep | Sarma | India | Indian Institute of Science | 26/3/23 06:19 |
| Tejas | Acharya | India | University of Oxford | 28/3/23 20:33 |
| Marinus | Lehmann | Germany | University of Potsdam | 30/3/23 10:56 |
Correct solutions by pre-university students:
| Chung Wang | Lam | Hong Kong | St. Paul’s Co-educational College | 25/2/23 15:52 |
| Alexandar | Roussev | Bulgaria | – | 27/2/23 10:02 |
| Ilan, Ivan (Team) | Mihelja, Hegedić | Croatia | XV. gymnasium Zagreb, V. gymnasium Zagreb | 27/2/23 11:05 |
| Filip | Vučić | Croatia | I. gymnasium Zagreb | 1/3/23 17:30 |
| Eppu | Leinonen | Finland | Munkkiniemen yhteiskoulu | 6/3/23 18:27 |
| Ruicheng | Ma | China | Harbin Normal University High School | 19/3/23 22:38 |
| Tomas | Babelis | Lithuania | Vilniaus jėzuitų gimnazija | 20/3/23 12:52 |
| Dženan | Midžić | Bosnia and Herzegovina | JU Gimnazija “Bihać” | 1/4/23 11:46 |
The list of countries:
Algeria, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahrain, Bangladesh, Belarus, Belgium, Bosnia and Herzegovina, Brazil, Bulgaria, Cambodia, Cameroon, Canada, China, Croatia, Cuba, Czech Republic, Ecuador, Egypt, El Salvador, Estonia, Finland, France, Georgia, Germany, Greece, Guatemala, Honduras, Hong Kong, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Kazakhstan, Kenya, Kosovo, Kyrgyzstan, Latvia, Lithuania, Macau, Malaysia, Mexico, Moldova, Montenegro, Nepal, Netherlands, Nigeria, North Korea, North Macedonia, Pakistan, Peru, Philippines, Poland, Romania, Russia, Rwanda, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Suriname, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Arab Emirates, United Kingdom, United States, Uzbekistan, Vietnam