Current Tournament
7.7.2025
Final problems selected for IYPT 2026
1. Invent yourself
A self-starting siphon can be made using a piece of rigid tubing bent into a specific shape. When the siphon is partially immersed in water, it begins siphoning water without the need for initial suction. Investigate how the relevant parameters, such as the geometry, affect the siphoning process.
2. Electrical damping
A magnet suspended by a spring will display simple harmonic motion when displaced. If the magnet oscillates within a coil connected to a resistor, its motion will be damped. Investigate the factors that affect the damping.
3. Ring fountain
When a flat metal ring falls from a certain height into a water tank, it generates a fountain that can shoot water high into the air. How does the maximum height of the fountain depend on the ring’s parameters?
4. Oil flow
A thin layer of cooking oil on a flat metal surface flows outwards when heated. Investigate the phenomenon and its dependence on relevant parameters.
5. Elastic wave dynamics
Suspend a metal ball from a fixed support using a rubber band and twist it many times around its vertical axis. When the ball is released, standing waves are formed on the rubber band. Investigate this phenomenon and study how the wave depends on relevant parameters.
6. Flipo Flip
A Flipo Flip toy can roll for multiple turns even though its shape is not circular. Investigate how its motion depends on parameters such as geometry and the initial release conditions.
7. Tennis racket theorem
When an object with different principal moments of inertia about each axis is thrown while it rotates, it can suddenly start rotating around an axis different from the one it was initially rotating about. Investigate how the rotational motion of such an object is affected by relevant parameters during its free fall.
8. Magnetic accelerator
Fix magnets in pairs onto a metal sheet as shown. If you attach two magnetic discs onto an axle this “vehicle” will accelerate over the rows of magnets under certain conditions. Investigate the phenomenon.
9. Levitation control
When arranged in a specific configuration, small graphite sheets can levitate on neodymium magnets. By shining light onto the surface of the graphite sheet, it is possible to control its movement. Explain and investigate the phenomenon.
10. Submerged crater
If you release sand or similar granular material in a container filled with water, the material will sink to the bottom and may form a crater-like structure. Explain and investigate the phenomenon.
11. Sweet monochromator
Pass linearly polarised white light through a column of sugar solution. When transmitted light is observed through a polariser it may appear coloured. Rotate the polariser, and the transmitted light colour may change. Construct such a sweet monochromator and optimise for the narrowest light wavelength bandwidth.
12. Autumn coin
The motion of a coin falling to the bottom of a tank filled with liquid can be remarkably similar to the fluttering and tumbling of a falling autumn leaf. Investigate how the motion of the coin depends on relevant parameters.
13. The singing ruler
When a ruler is clamped at one end and struck, it oscillates and emits a characteristic sound. Investigate how the sound depends on relevant parameters.
14. Crystal Critters
Observe the evaporation of a drop of table salt solution on a warm hydrophobic surface. After the water evaporates, a variety of characteristic crystal shapes remain. Research and explain this phenomenon.
15. Magnetic Newton’s cradle
Repulsing, non-touching magnets are used instead of colliding balls to make a new type of Newton’s cradle. The new cradle can act in a similar way to a regular cradle, but can also exhibit other interesting behaviour. Explain and study the movement of this magnetic cradle.
16. Twisted spaghetti
When a bundle of spaghetti is twisted, it might withstand higher transverse (side) forces than a straight, untwisted bundle. Investigate the response of a twisted bundle to transverse stress and identify the optimal twist that maximises tolerance to transverse stress.
17. Travelling flame
A flame can propagate continuously around a ring-shaped trough containing a thin layer of flammable liquid. Investigate how the characteristics of this travelling flame depend on relevant parameters.
Submitted by:
Mirkin Alex, Yuchong Chen, Jim Chen, Nikita Chernikov, Falk Ebert, Sam Edgecombe, Ivan Guilhon, Kent Hogan, Karel Kolář, Heiko Krabbe, Amanda Leung, Fabricio Marques, Ilya Martchenko, Irakli Mirotadze, Zixuan Peng, FelixWechsler.
6.7.2025
IYPT 2025 Results
We are pleased to share the official results of the IYPT 2025. Congratulations to all teams for their hard work, dedication, and outstanding achievements!
Thank you to all participants, team leaders, and organizers for making this year’s tournament truly memorable!
4.7.2025
Final Round Livestream
The Final Round of IYPT 2025 will be streamed live tomorrow!
Watch here.
Don’t miss the chance to see the top teams compete and join us online!
1.7.2025
Wincent Chill Out Zone
We are excited to announce that our sponsor Wincent will be hosting a Chill Out zone at the BMC, open from the morning of July 4th!
The Chill Out Zone will feature:
🍹lemonade & candy bar
🛋 comfy seating
🎮 PS5 zone
🎯 darts
🏎 F1 and flight VR simulators
🏆 Rubik’s cube tournament with prizes!
25.5.2025
Report from Inspection Visit to Lund – Useful Information Inside
In the middle of May, IYPT representatives met with the LOC in Lund to make sure everything is ready for the Tournament. We encourage all participants to read the report linked below, as it contains useful information about IYPT 2025!
1.5.2025
📢 Important: Check the FAQ Before Contacting the LOC
We kindly ask all Team Leaders to review the FAQ section on the IYPT 2025 website before emailing the Local Organizing Committee (LOC).
We’ve compiled answers to common questions — including topics like transit from Copenhagen Airport and arrangements for early arrivals or late departures. Please check there first to see if your question has already been addressed.
👉 Visit the FAQ here: https://2025.iypt.se
📲 Follow IYPT Sweden on Instagram!
Get behind-the-scenes content, sponsor highlights, and teasers of what’s coming at IYPT 2025 by following our official Instagram account:
➡️ @iypt_sweden
We’ll be using the account to share updates in the lead-up to the tournament — don’t miss out!
26.4.2025
Call for Jurors — Registration Deadline: April 30, 2025
We are in the process of finalizing the jury panel for our upcoming tournament and are seeking additional qualified jurors to complete our team.
If you are interested in contributing to the quality and fairness of the competition, we kindly invite you to register.
The deadline for juror registration is April 30, 2025.
We encourage all interested candidates to submit their application promptly.
👉 Register here: office@iypt.org
For any inquiries, please contact us at office@iypt.org.
We appreciate your support and look forward to your participation.
11.3.2025
Financial Support for Jurors
As in previous years, experienced jurors can apply for financial support, with the first cutoff date set for the 31st of March 2025.
Additionally, for the first time this year, first-time jurors who have previously participated in IYPT can apply for travel cost support and a waiver of the first-time juror fee.
11.3.2025
Registration for IYPT 2025 Is now Open!
Registration for the upcoming Tournament is now officially open until the 15th of April 2025. We encourage everyone to apply as soon as possible to help with tournament preparations.
Jurors and visitors can apply here: https://cc.iypt.org/registration/iypt2025/role/367/
Please note that first-time jurors must first register as possible jurors. You can do so here: https://cc.iypt.org/registration/iypt2025/jurors/apply
Team Members and Team leaders can apply here: https://cc.iypt.org/registration/iypt2025/member/175/
11.3.2025
Informal Online IOC Meeting Took Place
On the 21st of February 2025, an informal online IOC meeting was held with representatives from 22 countries. The discussion focused on proposed amendments to the regulations and potential adjustments to the tournament structure.
27.1.2025
‼️Official Statement Regarding “IYPTTutor”‼️
We would like to address recent concerns regarding the YouTube channel “IYPTTutor” (https://www.youtube.com/@jixavier4022). This channel falsely claims to sell solutions and provide insider advantages for the IYPT 2025. We strongly emphasize that IYPT has no affiliation with this channel or its operators.
Furthermore, any claims that members of “IYPTTutor” have been accepted as jurors in the 2025 tournament are entirely false. The selection process for jurors has not yet begun, making such statements both misleading and fraudulent.
The International Young Physicists’ Tournament (IYPT) is a competition that celebrates the hard work, creativity, and achievements of students. We expect all participants to present their own results and solutions, developed through their efforts and teamwork. Engaging with channels like “IYPTTutor” undermines the spirit and integrity of the competition.
We strongly urge the IYPT community to avoid interacting with “IYPTTutor,” refrain from making any payments, and report the channel and its user to YouTube for violating ethical and academic standards.
Thank you for helping us maintain the fairness and authenticity of the IYPT.
26.1.2025
IYPT 2025: Registered Countries Announced!
We are excited to introduce the countries registered for IYPT 2025 in Sweden! We look forward to welcoming all participants and sharing this incredible journey together.
24.1.2025
Report from the EC meeting
In November, the Executive Committee (EC) met in Lund, Sweden, to discuss key matters related to the organisation and future of IYPT. As a part of their visit, the EC also met with the Local Organising Committee of this year’s tournament to discuss preparations for the upcoming tournament.
During the visit, the EC looked at the Physics Fight rooms at Lund University, the accommodation in Elite Hotel Ideon and Motel L Lund, where participants will stay, and explored potential excursion sites.
The EC made several important decisions, including recognising John Balcombe’s lifelong dedication to the IYPT, introducing a confidentiality policy for all committees, and establishing new endorsement rules (you can read these in the attached document).
In the report linked below, you can read about discussions held and decisions made, and see the pictures from key venues for the next tournament:
Report from the EC Meeting
New Endorsement Rules
7.1.2025
🎉 Happy New Year 2025 from the IYPT Team! 🎉
As we welcome a brand-new year, we want to extend our heartfelt wishes for a year filled with success, discovery, and inspiration. Thank you for being part of this incredible community that brings science and curiosity to life!
We can’t wait to see you all in Lund, Sweden, for IYPT 2025—an unforgettable celebration of teamwork, innovation, and the love of physics!
Stay tuned for updates, and let’s make this year truly remarkable.
22.11.2024
The exact dates and fees for the 38th IYPT have been finalised by the Executive Committee.
The 38th IYPT is going to be held in Lund, Sweden from the 29th of June to the 6th of July 2025, followed by the IOC meeting from the 6th to the 8th of July 2025.
The registration fees for the upcoming tournament are summarised in the table below:
| Category | Fee (EUR) |
| Team | 2100* |
| Visitor | 1600 |
| First-Time Juror | 550 |
| Single Room Upgrade | 600 |
*Late fee: 2500 EUR. After the payment deadline (to be specified), teams must pay the Late fee. Please note that the late payments must be approved by the IYPT Office before the regular deadline.
4.8.2024
The official version of the Problems for IYPT 2025 has just been published. Take a look at them here.
2.8.2024
The 37th IYPT concluded in July and was a great success. We extend our thanks to everyone who made this event possible, especially the participants and jurors—your contributions are the heart of the tournament. For details about IYPT 2024, please visit the IYPT 2024 page.
2.8.2024
The 38th IYPT is planned to be held in Lund, Sweden, from late June to early July 2025.
28.7.2022
Are you interested in more information from the President of the IYPT, Martin Plesch?
Follow the IYPT and related topics on socials!
