Fyziklani Problems and Solutions
FYKOS's in-person team competition in Prague, held since 2006. Teams of up to five get three hours, starting with seven problems and unlocking harder ones as they solve them.
All Mechanics Electromagnetism Thermodynamics Waves & Optics Modern & Quantum Relativity Astrophysics
Cards List
Kinematics Dynamics Rigid body Fluids Gravitation Statics Electrostatics Circuits Magnetostatics Induction Em waves Heat transfer Gas laws Entropy Kinetic theory Phase transitions Oscillations Wave propagation Sound Interference Diffraction Geometrical optics Polarization Atomic Nuclear Particle Solid state Quantum mechanics Stellar Orbital mechanics Cosmology Observational
2026
Czech Republic
1 Aa. Summer drink not published 2 Ab. Marek’s ride not published 3 AC. Don’t judge a fish by its ability to run not published 4 Ad. Angle averaging not published 5 Ae. Vive la révolution not published 6 Af. Nacho dip not published 7 Ag. Active power plant not published 8 Ah. Water in the air not published 9 Ba. Valentine’s fluorite not published 10 Bb. Overturned glass not published 11 Bc. Coin on water not published 12 Bd. Prone to procrastination not published 13 Be. Schrödinger’s cat rescue mission not published 14 Bf. Sphere in a cylinder not published 15 Bg. A ball in hand not published 16 Bh. Nuts and bolts not published 17 Ca. As quick as snapping your fingers not published 18 Cb. How a wheel went wandering not published 19 Cc. Wien filter not published 20 CD. Spinning sink not published 21 Ce. Titanic not published 22 Cf. Christmas tree not published 23 Cg. Table oscillation not published 24 Ch. Plato’s current not published 25 Da. Warming rezistor not published 26 Db. Triple collision not published 27 DC. Watt’s magnetic governor not published 28 Dd. Overturned train not published 29 De. Where to with it? not published 30 Df. Hellish not published 31 Dg. Bead on parabole not published 32 Dh. Crossing the road in front of a car not published 33 Ea. Kaon decay not published 34 Eb. Three spheres not published 35 Ec. The shrunken Moon not published 36 Ed. Anti-reflective coating not published 37 Ee. Physical pendulums with stiff coupling not published 38 Ef. Inside of a glowing sphere not published 39 Eg. Got to be the best pirate I have ever seen not published 40 Eh. Grilled Roman, Sicilian-style not published 41 Fa. Starcraper not published 42 Fb. Oscillating massive pulley not published 43 Fc. Motocross derby not published 44 Fd. Conical cup not published 45 Fe. Fast-spinning kettle not published 46 Ff. Definitional not published 47 Fg. A new lamp not published 48 Fh. Ice bubble not published 49 Ga. Antigravitational not published 50 Gb. Opaque glass not published 51 Gc. Then measure it not published 52 Gd. Overturning a rectangular cuboid not published 53 Ge. Networking not published 54 Gf. Indistinguishable gases not published 55 Gg. Repulsive light not published 56 Gh. Charged ring not published 57 Ha. Friction on an inclined plane not published 58 Hb. Dramatic amplification not published
2025
Czech Republic
1 Aa. Quick pasta not published 2 Ab. More panic on the escalators not published 3 AC. Gasoline magic not published 4 Ad. Slow down, slow down! not published 5 Ae. Deeply they wave not published 6 Af. Calculating friction not published 7 Ag. Carbon emissions zero not published 8 Ah. Pressure in an enclosed tube not published 9 Ba. Fuel cell not published 10 Bb. Microscopic expansion not published 11 Bc. Exploring extraterrestrial puddles not published 12 Bd. Stretching a pulley not published 13 Be. Conductance quantum not published 14 Bf. An attempt at (not)shooting oneself not published 15 Bg. Peristaltic pump not published 16 Bh. Pineapple on pizza not published 17 Ca. Hard impact not published 18 Cb. A barking dog never bites not published 19 Cc. Hill climb racing not published 20 CD. Clear ice not published 21 Ce. Wheelchair user not published 22 Cf. Fast train in a turn not published 23 Cg. Ladybugs on a walk not published 24 Ch. Flying octopus not published 25 Da. Pineapple on pizza reloaded not published 26 Db. Hill climb racing reloaded not published 27 DC. An inclined cylinder on an inclined plane not published 28 Dd. A well-fed spaceman not published 29 De. A wild carousel not published 30 Df. P-roblematic oven not published 31 Dg. Compressing air-filled syringe not published 32 Dh. A stretching suspense not published 33 Ea. Fingal’s Fingers not published 34 Eb. Lego borrowed Verča’s coin not published 35 Ec. Showered not published 36 Ed. Journey to the off-center of the Earth not published 37 Ee. Conductive air not published 38 Ef. My brother Coriolis not published 39 Eg. Interstellar chocolate not published 40 Eh. 4 pulleys and 4 weights not published 41 Fa. Three Gorges Dam not published 42 Fb. Tem not published 43 Fc. Another race of point particles not published 44 Fd. Oscillating floating plate not published 45 Fe. Mobile mirror not published 46 Ff. Point mass in a round corner not published 47 Fg. Billiards not published 48 Fh. Pencil on the edge not published 49 Ga. Let’s not neglect Saturn not published 50 Gb. Electrostatic pyramid not published 51 Gc. Heavenly aquarium not published 52 Gd. Strange equilibrium not published 53 Ge. A snow globe not published 54 Gf. Surface conductivity not published 55 Gg. Cylinder à la rocket not published 56 Gh. A little restive dipole not published
2024
Czech Republic
1 Aa. Jellyfish not published 2 Ab. Bathing in a bathtub not published 3 AC. Panic at the escalators not published 4 Ad. Storing heat in liquids not published 5 Ae. Sheet shears not published 6 Af. Looking for a cyclist not published 7 Ag. Clean energy of tomorrow not published 8 Ah. Speed up at crossroads not published 9 Ba. Lonely little prince not published 10 Bb. Repulsive David not published 11 Bc. Student’s not published 12 Bd. Spring warm-up not published 13 Be. Aircraft tow tractors not published 14 Bf. Boredom on the subway not published 15 Bg. Titanic not published 16 Bh. Pulleys with mass rope not published 17 Ca. Turbomolecular pump not published 18 Cb. Sliding dryer not published 19 Cc. A magical bath not published 20 CD. Clash of the titans not published 21 Ce. Charged square not published 22 Cf. A folder with a clip not published 23 Cg. A falling suitcase not published 24 Ch. Dioptric not published 25 Da. Combustion not published 26 Db. A pond on a mirror not published 27 DC. Wombat’s not published 28 Dd. Street light not published 29 De. Honking trains not published 30 Df. Insomniac civlization not published 31 Dg. Fast muons not published 32 Dh. Cart with a plumb and friction not published 33 Ea. Mass points races not published 34 Eb. A pasta problem not published 35 Ec. Another bead on a string not published 36 Ed. Let’s increase intensity not published 37 Ee. Fykosaurus not published 38 Ef. Imperfect diode not published 39 Eg. Pressed hatch not published 40 Eh. Asynchronous single-phase motor not published 41 Fa. Irresistibly attractive reloaded not published 42 Fb. Rydberg state not published 43 Fc. Resistance of a reaction not published 44 Fd. Flag waving in the wind not published 45 Fe. Washing a chopping board not published 46 Ff. Arda not published 47 Fg. Boring vacation not published 48 Fh. Separable couple not published 49 Ga. Once again, there’s one left! not published 50 Gb. 21 zentimeter not published 51 Gc. Pew Pew not published 52 Gd. Inseparable couple not published 53 Ge. Self-propulsion not published 54 Gf. Decaying problem not published
2023
Czech Republic
1 Aa. At the concert not published 2 Ab. Slow cyclist not published 3 AC. Not enough time not published 4 Ad. Springs and weights not published 5 Ae. Gramophone not published 6 Af. Ball on the boat not published 7 Ag. Weighing a dog not published 8 Ah. Filling a bucket not published 9 Ba. CR7 not published 10 Bb. Chopping a parsley not published 11 Bc. A rod on springs not published 12 Bd. A swing not published 13 Be. Dense energy not published 14 Bf. A pulley that shifts not published 15 Bg. Does is float? not published 16 Bh. Restless coin not published 17 Ca. Oscillating pulley not published 18 Cb. A crystal of beryl not published 19 Cc. Lasagna not published 20 CD. Lenses for nothing not published 21 Ce. Heating with hydrogen not published 22 Cf. A cart with a plumb bob not published 23 Cg. Hot air balloon not published 24 Ch. Heating not published 25 Da. Cutting an apple not published 26 Db. Emergency and problematic not published 27 DC. Floating not published 28 Dd. Snowfall not published 29 De. Usa annexes not published 30 Df. Wind velocity not published 31 Dg. Race of shadows not published 32 Dh. Termoanemometer not published 33 Ea. Clumsy Danka not published 34 Eb. Simplified trebuchet not published 35 Ec. Repulsive 2D snowman not published 36 Ed. Searching for a type ii civilization not published 37 Ee. Doppler on a stroll not published 38 Ef. Pigeon doesn’t fall far from the stone not published 39 Eg. Dishwasher not published 40 Eh. Watering the flower bed not published 41 Fa. Too fast electron not published 42 Fb. Annihilation peak not published 43 Fc. Evil chandelier not published 44 Fd. Sphere in the road curve not published 45 Fe. We will prevent armageddon not published 46 Ff. Two rings not published 47 Fg. Stone doesn’t fall far from pigeon not published 48 Fh. Love and truth will overcome lies and hatred not published 49 Ga. Running princess not published 50 Gb. Stone is falling among pigeons not published 51 Gc. Crashed charges not published
2022
Czech Republic
1 Aa. It flows not published 2 Ab. Muddy not published 3 AC. Headphone jack not published 4 Ad. Fyziklani Prize not published 5 Ae. Dang reduction not published 6 Af. Oh, those Newton’s laws not published 7 Ag. Toilet vandalism not published 8 Ah. Time to shine not published 9 Ba. Nanoparticle coating not published 10 Bb. Racing not published 11 Bc. Aerogel on the water not published 12 Bd. Measuring the Earth radius on budget not published 13 Be. From extreme to extreme not published 14 Bf. Little wrecking ball not published 15 Bg. Traffic density on a highway not published 16 Bh. Dense lattice not published 17 Ca. Arachnophobia not published 18 Cb. Eighth-life not published 19 Cc. Attention, cyclist not published 20 CD. Neglecting Saturn not published 21 Ce. Heating of the synthetic air not published 22 Cf. Marble is jumping off the window not published 23 Cg. Thermos suction cup not published 24 Ch. Robo shoot! not published 25 Da. Waterboarding of iron ball not published 26 Db. Repulsive steering wheel not published 27 DC. Current of the metro not published 28 Dd. Fun at lecture not published 29 De. Hot plates not published 30 Df. Fast particles not published 31 Dg. Marble is falling off the window not published 32 Dh. Attack on the train not published 33 Ea. Broken rheostat not published 34 Eb. Blured spectrum of rotations not published 35 Ec. Watch your head not published 36 Ed. Duck not published 37 Ee. We’re setting ants on fire not published 38 Ef. Charged helicopter not published 39 Eg. Long wait not published 40 Eh. Terrain advantage not published 41 Fa. Cube in slip not published 42 Fb. Double infinity of lenses not published 43 Fc. Oscillatory voltage not published 44 Fd. Exhausted Sun not published 45 Fe. Marble didn’t guess not published 46 Ff. Zigzag not published 47 Fg. Magnetic (almost)levitation not published 48 Fh. Thirteen shots not published 49 Ga. Center of gravity of better snail not published 50 Gb. Falling tree not published
2021
Czech Republic
1 M.1. A pram not published 2 M.2. Pulleys on a railway car not published 3 M.3. A restless washing machine not published 4 M.4. Negative Moon not published 5 M.5. Relaxing at a train station not published 6 M.6. The importance of having passengers not published 7 M.7. A football problem not published 8 M.8. A wall not published 9 M.9. Pulleys on an inclined block not published 10 M.10. A not published 11 M.11. Falling coins not published 12 M.12. Leaping coin not published 13 M.13. Climbing not published 14 M.14. An impact into a wall not published 15 M.15. Non-quantum entanglement not published 16 M.16. Water planet not published 17 M.17. Slot car racing not published 18 E.1. The anti-diet of the Earth not published 19 E.2. Diomede Islands not published 20 E.3. Water on Mars not published 21 E.4. Rolling in the Neanderthal way not published 22 E.5. Dry not published 23 E.6. Hanging clothes not published 24 E.7. Gravitation not published 25 E.8. Rope on an inclined plane not published 26 X.1. Massive crash not published 27 X.2. Pythagorean theorem not working not published 28 X.3. Poisoned not published 29 X.4. Malicious X not published 30 X.5. Slip not published 31 X.6. Cruel game of fate not published 32 X.7. Even more malicious X not published 33 A.1. Flight from the Sun not published 34 A.2. Seti frequency not published 35 A.3. Gravitation in The Orwille not published 36 A.4. A little crescent moon not published 37 A.5. A New Year’s comet not published 38 A.6. Deadly Sun not published 39 C.1. Non-ideal ammeter not published 40 C.2. Cuboids not published 41 C.3. Inductors not published 42 C.4. Infinite and nasty circuit not published 43 C.5. Long wiring not published 44 O.1. Clapping at a concert not published 45 O.2. A bubble in ice not published 46 O.3. At a concert not published 47 O.4. Bells not published 48 O.5. Soliloquy not published 49 O.6. A bubble in a paperweight not published 50 T.1. Drinking water not published 51 T.2. A little sun not published 52 T.3. A simplified model of a balloon not published 53 T.4. Hot ball not published 54 T.5. A breakfast in Dukovany not published 55 T.6. Oscillating piston not published 56 T.7. A mining poison not published
2020
Czech Republic
1 Aa. Cold lemonade not published 2 Ab. Ropey not published 3 AC. At the bottom not published 4 Ad. Snow on the roof not published 5 Ae. Danka’s glasses not published 6 Af. Interdimensional potential not published 7 Ag. Caffeine not published 8 Ah. Non-ideal voltmeter not published 9 Ba. Pulleys again not published 10 Bb. Full tank, please not published 11 Bc. Dropped not published 12 Bd. Phy-lley not published 13 Be. How to move the world not published 14 Bf. A bubble in a sea not published 15 Bg. Doubly dioptric not published 16 Bh. A molecular rotator not published 17 Ca. Danger in class not published 18 Cb. Make a wish not published 19 Cc. A paintbrush is falling not published 20 CD. Sprinting on a wheelchair not published 21 Ce. Dancing not published 22 Cf. Heat and collisions not published 23 Cg. Cooking not published 24 Ch. Water in an angular tube not published 25 Da. The floor is lava not published 26 Db. Lift mechanics not published 27 DC. Rotation of the velocity vector not published 28 Dd. Heavy can not published 29 De. Jindra the tractor driver not published 30 Df. Lens-like mirror not published 31 Dg. At the absolute bottom not published 32 Dh. Retroreflection not published 33 Ea. Jerked around not published 34 Eb. Green shift not published 35 Ec. Are we climbing? not published 36 Ed. Hole in a planet not published 37 Ee. Slippery rope not published 38 Ef. RLC for sure this time not published 39 Eg. Rotation of polarisation not published 40 Eh. Tnt planet not published 41 Fa. Jindra ii. The tractor driver not published 42 Fb. Dome not published 43 Fc. Light please not published 44 Fd. Electron-y not published 45 Fe. Thirteen wells not published 46 Ff. Boiling not published 47 Fg. Inverse well not published 48 Fh. Of course it’s drinking water not published 49 Ga. Hole in a bucket not published 50 Gb. Excess heat not published 51 Gc. Parabolic rays not published
2019
Czech Republic
1 Aa. Escalator strangeness not published 2 Ab. Far from the planet not published 3 AC. It sparks not published 4 Ad. Beware tram not published 5 Ae. Unstable Danka not published 6 Af. Flat-Earth not published 7 Ag. The Prague Metro not published 8 Ah. Prefixious not published 9 Ba. Landing accident not published 10 Bb. Drawing not published 11 Bc. Acceleration from planets not published 12 Bd. Drinking tea not published 13 Be. At the bottom of the lake not published 14 Bf. Take a guess not published 15 Bg. Exosystem with a planet not published 16 Bh. Price of a flight not published 17 Ca. When physicist cooks not published 18 Cb. The price of charging a car battery not published 19 Cc. Mirrors not published 20 CD. Model of an atom not published 21 Ce. Degradation of the efficiency of a kettle not published 22 Cf. Zkkzgt zjazq not published 23 Cg. Playing with marbles not published 24 Ch. Flat-Earth reloaded not published 25 Da. Not even an oil stain not published 26 Db. Rabbit no racist not published 27 DC. Lumberjack physicist not published 28 Dd. Black box not published 29 De. Two cuboids not published 30 Df. Fast crash not published 31 Dg. Air goes through not published 32 Dh. Lifting by lever not published 33 Ea. Asymmetrical pendulum amplitude not published 34 Eb. Jachym’s bow not published 35 Ec. Laser not published 36 Ed. 1D billiards not published 37 Ee. Wailing vibes not published 38 Ef. Crane driver not published 39 Eg. Christmas snowman reloaded not published 40 Eh. Lunar mining not published 41 Fa. Christmas snowman not published 42 Fb. Slide farther not published 43 Fc. Bouncing pendulum not published 44 Fd. Capacitors not published 45 Fe. Christmas snowman reloaded reloaded not published 46 Ff. Analytical bouncing ball not published 47 Fg. Ice hockey sticks not published 48 Fh. Flat-Earth reloaded reloaded not published 49 Ga. Centrifuge not published 50 Gb. Drinking tea 2.0 not published
2018
Czech Republic
1 Aa. Wouldn’t steal a car not published 2 Ab. Simple conveyor belt not published 3 AC. Dropped banknote not published 4 Ad. Zero to hundred not published 5 Ae. Bathing not published 6 Af. Comparison of the calorific value not published 7 Ag. Conveyor belt travelling problem not published 8 Ah. Crossed mirrors not published 9 Ba. Antimatterianism not published 10 Bb. Interplanetary pendulum not published 11 Bc. Charged balls not published 12 Bd. The new dimension not published 13 Be. Repulsive cube not published 14 Bf. Bubble bath for Janap not published 15 Bg. Mercury column not published 16 Bh. Sunken not published 17 Ca. Walk on a boat à la Dan not published 18 Cb. Perpetuum mobile of the second kind not published 19 Cc. Asteroids not published 20 CD. A complex network not published 21 Ce. Small data not published 22 Cf. Hard-working heart not published 23 Cg. I’m just all right not published 24 Ch. Lighthouse not published 25 Da. Bernoulli in real life not published 26 Db. Thunderstorm not published 27 DC. Football problem not published 28 Dd. Lens and mirror not published 29 De. Cleaning glasses not published 30 Df. Four body problem not published 31 Dg. Why is it smoking? not published 32 Dh. Solar sniper not published 33 Ea. Those resistors again not published 34 Eb. Typical problem of a commuter not published 35 Ec. Merry-go-flat not published 36 Ed. Finally a pleasant temperature not published 37 Ee. Repulsive not published 38 Ef. Hang up that pendulum! not published 39 Eg. Triangular network not published 40 Eh. Zero to hundred for the third time not published 41 Fa. Stretched not published 42 Fb. Procrastination not published 43 Fc. A lot of computations not published 44 Fd. Roof and cylinder not published 45 Fe. Zero to hundred for the second time not published 46 Ff. A ring not published 47 Fg. Matěj’s four spheres not published 48 Fh. Spinning container not published 49 Ga. Rope not published 50 Gb. Solar rod not published 51 Gc. Fireworks not published
2017
Czech Republic
1 Aa. Na rozehřátí not published 2 Ab. Nelineární kondenzátor 1 not published 3 AC. Vzdálená komunikace not published 4 Ad. Dietní chyba not published 5 Ae. Dva roky jezdím bez nehod not published 6 Af. Hapalo not published 7 Ag. Jedu! not published 8 Ah. Kulička na pružince not published 9 Ba. Mlsná not published 10 Bb. Neprůstřelná not published 11 Bc. Aby si z vás nevystřelila Hepnarová... not published 12 Bd. Lada na ledě not published 13 Be. Letadlo not published 14 Bf. (ne)ustálená nádrž not published 15 Bg. Procházka s autobusy not published 16 Bh. Sedm a dost not published 17 Ca. Sněhové radovánky Dana not published 18 Cb. Termodynamická rozcvička not published 19 Cc. Umělecký stůl not published 20 CD. Blížení elektronu not published 21 Ce. Dračí chřtán not published 22 Cf. Jak se nechat ozářit not published 23 Cg. Králova koruna not published 24 Ch. Napařovací not published 25 Da. Písek, písek, písek not published 26 Db. Planckova frekvence not published 27 DC. Spočetná not published 28 Dd. Tuhý a tužší not published 29 De. Aby jim výtah dobře Shell not published 30 Df. Bolometr říká, že... not published 31 Dg. Je tu volno? not published 32 Dh. Nehoda v LEPu not published 33 Ea. Nekonečná trivka not published 34 Eb. Poslední příhoda pana Kuličky not published 35 Ec. Proton bumbác not published 36 Ed. Přetopeno not published 37 Ee. Dlážděná not published 38 Ef. Konflikt datových formátů not published 39 Eg. Milikanův experiment not published 40 Eh. Nehoda v LEPu podruhé not published 41 Fa. Nelineární kondenzátor 2 not published 42 Fb. Pružná voda z vesmírné stanice not published 43 Fc. Asteroidové pole not published 44 Fd. Dutoplaneta not published 45 Fe. Chyba drátu not published 46 Ff. Korigované kyvadlo not published 47 Fg. Magnetické škrtidlo not published 48 Fh. Nepříjemná propast not published 49 Ga. Rovný děj not published 50 Gb. Uhlíkové stáří not published
2016
Czech Republic
1 Aa. šla Nanynka do zelí not published 2 Ab. čtvrtmaraton not published 3 AC. Stará raketa not published 4 Ad. Nakloněná páka not published 5 Ae. Animální přitažlivost not published 6 Af. Zapomenutá voda not published 7 Ag. Plovoucí poklad not published 8 Ah. Dobře promazané not published 9 Ba. Hustá not published 10 Bb. Hra se stíny not published 11 Bc. Zdlouhavá not published 12 Bd. Mercurial not published 13 Be. Náledí not published 14 Bf. Střelba na pohyblivý cíl not published 15 Bg. Neviditelná termoska not published 16 Bh. Zaplatíš krví! not published 17 Ca. Bum bác not published 18 Cb. Vejde se? not published 19 Cc. Světlo se ohýbá not published 20 CD. Autobusová not published 21 Ce. Rozbitý výtah not published 22 Cf. Vstávat a cvičit not published 23 Cg. Vodu si osladím not published 24 Ch. Zapomenutý obvod not published 25 Da. Náhle otočil o 360 stupňů not published 26 Db. Nabíječ not published 27 DC. Chvilka napětí not published 28 Dd. Útok z hlubiny not published 29 De. Literární not published 30 Df. Duhovka not published 31 Dg. Jak se zbavit momentu hybnosti? not published 32 Dh. řádné horko not published 33 Ea. Usměrňovač not published 34 Eb. Kostky not published 35 Ec. Poměřovací not published 36 Ed. Kořalka not published 37 Ee. Kalamita not published 38 Ef. Cesta do školy not published 39 Eg. Přímochlad not published 40 Eh. Mřížka not published 41 Fa. Hračka chudých dětí not published 42 Fb. Není všechno ideální not published 43 Fc. Planetka not published 44 Fd. Planetární hydrostatika not published 45 Fe. Obtížný hmyz not published 46 Ff. Uranový důl not published 47 Fg. Tajeme not published 48 Fh. Elektromagnetický výtah not published 49 Ga. Digamma not published
2015
Czech Republic
1 Aa. Nestejné poloviny not published 2 Ab. Ibyšta not published 3 AC. Bum, prásk a praskne zrcadlo not published 4 Ad. Symetrická not published 5 Ae. Zahřívací not published 6 Af. Silný proud not published 7 Ag. finanční stránka výletu not published 8 Ah. Interesantní případ překulení not published 9 Ba. Stabilizace voru ledního medvídka not published 10 Bb. Ztraceni not published 11 Bc. Plastelínová srážka not published 12 Bd. Jůů, Pendolíno! not published 13 Be. Evakuace balonku not published 14 Bf. Tlak v nitru Země not published 15 Bg. Trefovaná not published 16 Bh. Biopalivo not published 17 Ca. Geosynchrotron not published 18 Cb. Přetržení houpačky not published 19 Cc. Kuličková dráha not published 20 CD. Simulace LHC not published 21 Ce. Proč se ta voda už nevaří? not published 22 Cf. Rolling deep not published 23 Cg. Aproximace řeky Styx not published 24 Ch. Jednoduché fyzické kyvadlo not published 25 Da. Dohola not published 26 Db. Važme si váhy not published 27 DC. V jednotě je síla not published 28 Dd. Pružná not published 29 De. Chytré housenky not published 30 Df. Elektropřezmen not published 31 Dg. Podivná impedance not published 32 Dh. Nepružná not published 33 Ea. A přece se točí konečným momentem hybnosti not published 34 Eb. Ve stínu Coulomba not published 35 Ec. Ekvidistantní drátěnka not published 36 Ed. Kolo štěstí či experiment ve vyučovací hodině not published 37 Ee. Kdo nedriftuje s námi. . . not published 38 Ef. Tři holubi not published 39 Eg. Toliko fotonů. . . not published 40 Eh. Zlá lampa not published 41 Fa. Nepředbíhat! not published 42 Fb. Svažitá řeka not published 43 Fc. Coda not published 44 Fd. Absolutně černé kuře not published 45 Fe. Laboratorní osvětlení not published 46 Ff. Jako ve středověku not published 47 Fg. Praktická ukázka Fyziky V not published 48 Fh. Kdo jinému jámu kopá. . . not published 49 Ga. Armageddon not published 50 Gb. Elastická smyčka not published 51 Gc. Twinkle, twinkle double star not published 52 Gd. Proč ne komplexní? not published 53 Ge. Magnetická vodka not published
2014
Czech Republic
1 Aa. Z toho se nevykroutíš not published 2 Ab. Na Měsíci not published 3 AC. Zamilovaný král not published 4 Ad. Alchymie not published 5 Ae. Titanic not published 6 Af. Cestou nejmenšího odporu not published 7 Ag. Padající řetízek not published 8 Ah. Hustá krychle not published 9 Ba. Roztržitá voda not published 10 Bb. Vrhni not published 11 Bc. Termodynamická rozcvička not published 12 Bd. Utahování opasků not published 13 Be. Ekologické zasněžování not published 14 Bf. Nemocné peníze not published 15 Bg. Porcování planety not published 16 Bh. Těžká váha not published 17 Ca. Napětí v obvodu not published 18 Cb. Smrt shůry not published 19 Cc. Srážka not published 20 CD. Beduínův bublifuk not published 21 Ce. Bohatý elektrikář not published 22 Cf. Pružinková not published 23 Cg. Nech mě spát! not published 24 Ch. Dvojlinka not published 25 Da. Pyramida not published 26 Db. Diskoráz not published 27 DC. Aby jim výtah dobře Shell not published 28 Dd. Biologická mřížka not published 29 De. Aerodynamický tunel not published 30 Df. Kdo neuteče, vyhraje! not published 31 Dg. Došla ropa not published 32 Dh. Odporné teplo not published 33 Ea. Elektroskopové kuličky not published 34 Eb. Ale proč dva? not published 35 Ec. Vlnovod not published 36 Ed. Blížení elektronu not published 37 Ee. Dobře vybavená laborka not published 38 Ef. Střelecké perpetuum mobile not published 39 Eg. Tání ledu not published 40 Eh. Nedotýkej se mě! not published 41 Fa. Pružná voda z vesmírné stanice not published 42 Fb. Skoromethan not published 43 Fc. Obecná planetka not published 44 Fd. Pružinkotyčový závěs not published 45 Fe. Dvojlinka reloaded not published 46 Ff. Mapy.cz not published 47 Fg. Vodivé kolečko not published 48 Fh. Vodivé kolečko reloaded not published 49 Ga. Radar not published 50 Gb. Nepříjemná propast not published 51 Gc. Rakety not published
2013
Czech Republic
1 Aa. Zpátečník not published 2 Ab. Písky času not published 3 AC. Těžký život se vzduchem not published 4 Ad. Jezdkyně vysává not published 5 Ae. Ozubená kolečka not published 6 Af. Zasypaný Měsíc not published 7 Ag. Brzdící not published 8 Ah. WiFi not published 9 Ba. Peking not published 10 Bb. Tom a Jerry not published 11 Bc. Dobrodružství ledové kostky not published 12 Bd. Tužtička not published 13 Be. Pátrání po předcích not published 14 Bf. Kotva not published 15 Bg. Home sweet home not published 16 Bh. Vodečka not published 17 Ca. Křivý úsměv not published 18 Cb. Chyba not published 19 Cc. Skokan mostní obecný not published 20 CD. Elektrizující naviják not published 21 Ce. Anihilační žárovka not published 22 Cf. Vaření vody not published 23 Cg. Zaseknutá koule not published 24 Ch. Váhavé napětí not published 25 Da. Mercurial not published 26 Db. Pták narcisák not published 27 DC. Kostečky not published 28 Dd. Rande s fykosákem not published 29 De. Audiofilská not published 30 Df. Netopýří šampionát not published 31 Dg. Vlnitý elektron na baterku not published 32 Dh. Lomivka not published 33 Ea. Sledování rychlého rozpadu not published 34 Eb. Odraz od satelitu not published 35 Ec. Akvárium not published 36 Ed. Ruské kuželky not published 37 Ee. Houpačka not published 38 Ef. Neposedná či posedná destička not published 39 Eg. Optická lavice not published 40 Eh. Ohřev mléka not published 41 Fa. Mariánský příkop vs. Mount Everest not published 42 Fb. Svíčková not published 43 Fc. Spravedlivý pan Gauss not published 44 Fd. Kmit kmňak not published 45 Fe. Kondíky not published 46 Ff. Odporový koberec not published 47 Fg. Potenciálně pokřivené vlny not published
2012
Czech Republic
1 1. Běžec not published 2 2. Zákeřné hmotnosti not published 3 3. Oxid uhličitý not published 4 4. černá díra not published 5 5. Vodiče not published 6 6. Nestrkej ty prsty do vrtule! not published 7 7. Kytička Dominička not published 8 8. Koule kuličky not published 9 9. Vyžraný Měsíc not published 10 10. Míček not published 11 11. Výstup na Rysy not published 12 12. Alkohol za řídítka nepatří not published 13 13. Totální nasazení not published 14 14. Brrroky not published 15 15. Hdd not published 16 16. Pružinky not published 17 17. Pralovec not published 18 18. Brzdíme not published 19 19. Výparné not published 20 20. Rotujeme not published 21 21. Zlatá koule not published 22 22. Zmatek na stole not published 23 23. Bum do něj not published 24 24. Dynamické kvádříky not published 25 25. Trabant not published 26 26. Od nuly k nule not published 27 27. Výboj not published 28 28. Popelka not published 29 29. Rozhodčí v kotli not published 30 30. Hups not published 31 31. Ladička šla na Petřín not published 32 32. Letadlo not published 33 33. Válec not published 34 34. Odporující hvězda not published 35 35. Hra s míčem not published 36 36. Modelářská not published 37 37. Z pohádek bratří Grimmů not published 38 38. Kohoutek not published 39 39. Koberec naruby not published 40 40. Výplach mozku not published 41 41. Závaží na tyči not published 42 42. Držíme kladky not published
2011
Czech Republic
1 1. Záludné kvádry not published 2 2. Kosmická loď not published 3 3. Ledový měsíc not published 4 4. Vypařující se hrnek not published 5 5. Gravi-ele kyvadlo not published 6 6. Náboje not published 7 7. Slunce přibralo not published 8 8. Vypuštěná koule not published 9 9. Black box not published 10 10. Vzduchovka reloaded not published 11 11. Odstředivka not published 12 12. žebřík navždy not published 13 13. Neduhová not published 14 14. Dělo not published 15 15. Brzdíme not published 16 16. Matfyzácký tělocvik not published 17 17. Brýle na hovno not published 18 18. Nabitá kapička not published 19 19. Nikdo není dokonalý not published 20 20. Podivuhodná trampolína not published 21 21. Měříme Planckovu konstantu not published 22 22. Osmistěnka not published 23 23. čekání na mičudu not published 24 24. Dutohlav not published 25 25. Kosmická loď reloaded not published 26 26. Koule pod zemí not published 27 27. Klouzačka not published 28 28. Rázovitý kraj not published 29 29. Panďulák not published 30 30. Urychlený pozitron not published 31 31. Fontánka not published 32 32. Zběsilá kulička not published 33 33. Bláznivá zoo not published 34 34. Rozbitý kondenzátor not published 35 35. Vada na kráse not published 36 36. Odporná trivialita not published 37 37. Nekonečně nekonečná síť not published 38 38. Fotíme krychli not published
2010
Czech Republic
1 1. Rychle do školy not published 2 2. Nereálný motor p not published 3 3. Nemyslíš, zaplatíš not published 4 4. Osa útočí not published 5 5. Drtivý spad not published 6 6. Hopskulka not published 7 7. Odporné kombinace not published 8 8. Reprák not published 9 9. Ostřelovačská not published 10 10. Dusíková zmrzlina not published 11 11. Ekvilibrium not published 12 12. Bungee not published 13 13. . . . Drát! not published 14 14. Pole not published 15 15. Záludný trojúhelník not published 16 16. Ještě záludnější trojúhelník not published 17 17. Hmoťák not published 18 18. Otočená tyč not published 19 19. Faustova částice not published 20 20. Garáž not published 21 21. Drahá legrace not published 22 22. žirafa not published 23 23. Voscilace not published 24 24. Jaká je de Broglie not published 25 25. Dvanáctistěn not published 26 26. Návrat slezských havířů not published 27 27. Fe Guevara not published 28 28. Skákající pterodaktyl not published 29 29. Blik not published 30 30. Nabité korále not published 31 31. Koktejl not published 32 32. Nejhorší ze všeho jsou trpaslíci not published 33 33. Tenisový míček not published 34 34. Frekvenční výhybka not published 35 35. Vozík not published 36 36. Měření rychlosti not published 37 37. Pétanque not published 38 38. Tuhé péro not published 39 39. Všechno lítá not published 40 40. Havárie not published
2009
Czech Republic
1 Speed of sound in rail* not published 2 Wheatstone bridge null condition* not published 3 Two-hole tank outflow* not published 4 Solar fusion fuel burn rate* not published 5 Moment of inertia of a cube* not published 6 Supersonic jet shock cone* not published 7 Sound interference in a well* not published 8 Dog and boat displacement* not published 9 Center of mass of cut shape* not published 10 Tea thermos flipping* not published 11 Weight on a thread in accelerating wagon* not published 12 Rowing boat speed vs crew* not published 13 Friction on icy slope* not published 14 Solid angle of Earth from spaceship* not published 15 Closest approach of two cars* not published 16 Light speed in flowing water* not published 17 Minimum kick speed for pass* not published 18 Skydiver's fall segments* not published 19 Central charge for square equilibrium* not published 20 Minimum period physical pendulum* not published 21 Pulley system with hanging masses* not published 22 Image of a disc near a lens* not published 23 Rope on inclined plane* not published 24 Pendulum collides with block* not published 25 Cut spring frequency* not published 26 Joule cycle efficiency* not published 27 Infinite resistor ladder* not published 28 Density from spring extension* not published 29 Copper plate inserted into capacitor* not published 30 Superconducting square loop oscillations* not published 31 Problem 31* not published 32 Orbital drift from dust accretion* not published 33 Reading glasses for far-sighted eye* not published 34 Maximum power in resistor* not published 35 Reflection from moving mirror* not published 36 Pendulum on a track* not published 37 Frozen bucket ice surface* not published 38 Maximum annihilation photon energy* not published 39 RC circuit effective current* not published 40 Moon fall time* not published
2008
Czech Republic
1 1. Dvacet metrů pod mořem not published 2 2. Kombinační not published 3 3. čočkule not published 4 4. Gravitační frekvenční posuv not published 5 5. Apollo not published 6 6. Adiabatický oscilátor not published 7 7. Antireflexní vrstva not published 8 8. Zrcadla aneb, kdo je hezčí not published 9 9. Divné kyvadlo not published 10 10. Kmitohrátky not published 11 11. Tenisová úloha not published 12 12. Expanze plynu not published 13 13. Bóje not published 14 14. Nabitý prstýnek not published 15 15. Elektron a cívka not published 16 16. Gumová tyč not published 17 17. Loďka na Vltavě not published 18 18. Počasíčko not published 19 19. Velká bankovní loupež not published 20 20. Píst not published 21 21. Cesta z města not published 22 22. Nová generace not published 23 23. Oční not published 24 24. Zabedněné kostky not published 25 25. Neděle v balóně not published 26 26. Stvořte bublinu not published 27 27. Měděná koule not published 28 28. Ladění varhan not published 29 29. Hopsadlo not published 30 30. Drtivý dopad not published 31 31. Stlačování vzduchu not published 32 32. Dva válce not published 33 33. černá družice not published 34 34. člověk na voru not published 35 35. Meteoroid not published 36 36. Pavouk a moucha not published 37 37. Podivná dioda not published 38 38. Infantilní not published 39 39. Skleněné destičky not published 40 40. Baterka not published
2006
Czech Republic
1 1. Mouchy not published 2 2. Přemisťování kostky not published 3 3. Tělesa na kladce not published 4 4. žebřík not published 5 5. Závažíčko na kouli not published 6 6. Odpor čtyřstěnu not published 7 7. Rozsah ampérmetru not published 8 8. čočky not published 9 9. Kondenzátor not published 10 10. Smyčka jako proměnný odpor not published 11 11. Hustoměr not published 12 12. Vodní planeta not published 13 13. Dvě kapičky not published 14 14. Loďka not published 15 15. Práce z tepla not published 16 16. Hodinky not published 17 17. Dědeček a řepa not published 18 18. Zrcadlo z rtuti not published 19 19. Skok do dálky not published 20 20. Houkající lokomotiva not published 21 21. Polopropustná zrcadla not published 22 22. Vlak z Helsinek not published 23 23. Bruslař not published 24 24. Netradiční ohřívání čaje not published 25 25. Jak rychlá je lokomotiva? not published 26 26. Proděravěná nádoba not published 27 27. Kulička na vlákně not published 28 28. Srážka dvou kamenů not published 29 29. Akvárium not published 30 30. želvičky not published 31 31. Mravenec na provázku not published 32 32. Kolotoč not published 33 33. Kapička not published 34 34. Vlak v zatáčce not published 35 35. Válec not published 36 36. Dadarinův stroj not published 37 37. Dvě kosmické lodi not published 38 38. Coulomb versus Newton not published 39 39. Vodík a kyslík not published 40 40. Skály not published 41 41. Dvě bubliny not published 42 42. Skleněný půlválec not published
