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Défi : ouvrir un pot de confiture sans effort

S1 E20
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Agathe wants to put David and Vincent to the test. The leader of the gang concocts jam jars with very strong lids with the triple world champion and a brigade of mini-cobayes. Vincent imagines a lever arm for very little effort. David digs into atmospheric pressure. Who will have the most efficient method?

Levels:
Secondary Grade 12 Grade 9 Grade 11 Grade 10
Subjects:
Science and technology Structures and Mechanisms Physics
Skills:
Problem Solving Critical Thinking Collaboration
French level:
B1: Threshold Independent User (B1 - B2) B2: Vantage
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E1 : Défi battre une championne de ski cross

20min53s
The ski cross champion Ophélie David has invited the Cobayes to compete against her in a race! In the wind tunnel, David and Agathe put on their skis to determine the most aerodynamic position. Will our cobaye sportsman reach the finish line?
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E2 : Défi verser du thé avec trois mètres de haut

14min52s
It's tea time in the shed! Nazed Hanzed asks the experimenters, 'How high can you pour a liquid, like mint tea, into a container without spilling it everywhere?' Before pouring the three-meter-high hot beverage, Elise and David studied the behavior of the tea to various disturbances and chose the right tools. To avoid…
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E3 : Combien de pulls peut-on faire avec un mouton?

16min47s
To check if our cobayes know how to play 'Who wants to win sheep? 'Elise prepares a little quiz. From unraveling, to spinning wool, to shearing sheep, our cobayes are determined to know how many sweaters can be knitted with a single sheep! Wool will no longer hold any secrets for our trio!
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E4 : Marquer un penalty contre son camp

16min33s
Everyone has their own way of scoring a penalty on the other side of the field. Vincent summons a soccer champion with a powerful shot: Sydney Govou. David relies on science and a little DIY with an explosive 'patator'! Elise, experienced in video game techniques, wins on the virtual. Who will succeed in the challenge and…
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E5 : Peut-on faire du foot comme dans les dessins animés?

14min18s
Acrobatic figures, juggling, mastering the ball and trajectories, Vincent learns about freestyle soccer. On his side, David dissects the football to discover all its secrets. With a few special effects and a little training, our cobayes are transformed into cartoon characters!
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E6 : Mission entrer dans un jeu vidéo

16min9s
The Cobayes are exploring a new universe: video games! While David and Vincent revisit the history of games at the Cité des Sciences et de l'Industrie, Elise goes to Vancouver in Canada to the famous EA Sports studios. Equipped with sensors, our cobaye is going to have her body and face digitally reproduced and enter a famous…
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E7 : Défi faire du skate tout terrain

14min16s
New daredevil mission for our Cobayes! Vincent learns to mountainboard with the triple world champion. While he learns the basics of this perilous discipline, David studies the physics of this all-terrain board. No detail is left to chance, let's hope that everything works like a charm.
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E8 : Peut-on défoncer une porte comme dans les films?

16min30s
Once again, our shock team attempts to demystify cinematic stunts! What is the best way to break down a door? While David tests the different points of impact, Agathe explores the techniques of firefighters who have to open doors in an emergency! Can our Cobayes get out of their own way without breaking down open doors?
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E9 : Mission faire un nid géant

15min37s
Little by little the Cobayes make their giant nest... In their natural environment, David observes the birds and understands what a nest is really for. Elise, for her part, examines different nests to find the most suitable for the strange birds that are Agathe, David and Vincent! Let's put it into practice: will branches, lianas…
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E10 : Mission rouler à moto sur une roue

14min31s
Our daredevil is used to two-wheeled missions, but this time he has to succeed in a wheeling: riding on the back wheel! While David tries to understand the specificities of this car that can only be driven on a circuit, Vincent discovers the 'Stunt' motorcycle with the impressive Jorian Ponomareff. Will our Cobaye manage to…
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E11 : Peut-on flotter comme un canard ?

15min10s
Elise goes to meet the ducks in a park while David puts a palmiped through the famous guinea pig scanner! What is it about their morphology that allows them to float? Our crazy testers are inspired by ducks and make a giant feather float. Which Cobaye will jump into the water?
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E12 : Défi couper des fruits comme dans un jeu vidéo

17min19s
The Cobayes are inspired by a video game to take on a crazy new challenge: cutting up as much fruit as possible in flight! David sets out to find the most efficient blade. Vincent becomes a ninja and learns the martial art of battodo. It is armed with a sword that our daredevil tries to meet the final challenge. Fruit salad at will in…
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E13 : Mission plonger sans bouteille

18min
After many underwater adventures, Vincent's new mission is to dive without a tank. Direction Marseille where our daredevil takes his first steps in a diving suit! As for David, he thinks about the best way to dive without asphyxiating. It is finally with a triple world champion of apnea that Vincent will dive! But for how long? …
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E14 : Défi beurrer des biscottes sans les casser

14min33s
Agathe puts on an apron and concocts her own cobayes crackers on the advice of Raphaël Haumont. For his part, David studies the physics of this double-baked sandwich bread. As for Elise, she immerses herself in the composition of butter. Our two Cobayes face each other in a match of anthology. Who will keep their biscotti intact? An…
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E15 : Peut-on faire un pont en ruban adhésif ?

14min3s
David has an appointment with the inventors of duct tape to discover all its secrets! Elise is literally taped to the wall! Which adhesive will be the strongest to make a bridge capable of supporting our crazy testers? After many hours of work and a few kilometers of tape, will our Cobayes be at the end of their rope?
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E16 : Défi descendre une piste noire en VTT

16min15s
With the downhill mountain bike world champion, Vincent learns the techniques of this perilous discipline. In the lab, Elise puts herself to the test of the maximum inclination of a two-wheeler and David, for his part, tests the suspensions. Positioning and equipment have no more secrets for our crazy testers. Will Vincent arrive in…
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E17 : Fête de la science Magique ou scientifique?

16min1s
The Cobayes celebrate the science festival! For this occasion, Agathe gives David free rein. Our scientist improvises himself as a magician and challenges Elise and Vincent to decipher his mysterious tricks. The Cobayes are looking for scientific explanations for these surprising phenomena! Abracadabra, will the Cobayes succeed? …
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E18 : Mission courir sans renverser son café

15min35s
New mission for the guinea pigs: win the famous coffee boy race without spilling a drop of the beverage! Agathe and David study the reaction of liquids to variations in movement and speed. Our scientist builds an ingenious counterbalanced tray stabilizer. Will Vincent prove flexible and agile enough?
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E19 : Mission descendre une cascade en kayak

15min58s
The Cobayes are going to get their trunks wet again! While Elise and David study the reactions of white water and river currents, Vincent has an appointment with the world champion of extreme kayaking. Thanks to his advice, our daredevil is initiated to the discipline and will try to descend a 10 meters waterfall! Let's hope he…
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E20 : Défi : ouvrir un pot de confiture sans effort

15min20s
Agathe wants to put David and Vincent to the test. The leader of the gang concocts jam jars with very strong lids with the triple world champion and a brigade of mini-cobayes. Vincent imagines a lever arm for very little effort. David digs into atmospheric pressure. Who will have the most efficient method?
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E21 : Faire fondre du métal comme neige au soleil

16min15s
A hot challenge awaits the Cobayes! While Vincent and Agathe are looking for the most heat-resistant metal, David and Elise are interested in the heating properties of different light sources. It is in the most powerful solar oven in the world that our scientist will try to melt titanium!
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E22 : Mission faire un looping en courant

16min12s
A new mission that is likely to make our Cobayes' heads spin! While Vincent tests his limits in a roller coaster, on the ground, David deciphers the potential kinetic and centrifugal forces that come into play in the loop. Our leader has invited the yamakasis to perform this feat. Let's hope they don't take their legs…
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E23 : Battre le record de bulle de chewing gum

14min45s
Our crazy testers are eagerly tackling a world record: the biggest bubble gum bubble! After determining which bubble gum has the most elasticity, they will redouble their ingenuity to meet the challenge. While Vincent trusts his jawbones, David has made a 'bubble machine' and Elise has a little surprise in store for them... …
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E24 : Faut-il avoir peur du loup?

16min34s
The Cobayes will overcome their childhood fears in wolf's pace... David approaches tamed wolves at a film trainer's house. In the shed, with Elise, they compare the anatomical differences between dogs and wolves. It is in the Park of Sainte Croix in Lorraine that Vincent is going to rub shoulders with a pack of wild wolves,…
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E25 : Sauter à ski le plus loin possible

17min
The Cobayes take flight! Aerial mission for our daredevil, but this time he must put on skis! While David experiments with the physics of the ski jump, Vincent learns to ski jump with the world champion. Position, impulse and speed, our guinea pig leaves no detail to chance before taking off, not without fear!
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E26 : Un stylo peut-il écrire au plafond?

16min50s
Our band of crazy testers wants to write the history of the show again! While David unravels the secrets of felt-tip pens, Elise explores the secrets of ballpoint pens in the factory of a mythical brand! Our scientist is inspired by astronauts' pens to imagine one that can write on the ceiling. Who will end up upside down?
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E27 : Défi faire tourner une assiette chinoise géante

12min42s
At Cobaye Circus, Agathe has invited children and professional jugglers! With their advice, David and Vincent try to limit the damage but juggling with plates is not easy... Our scientist takes a closer look at the gyroscopic effect while Elise and Vincent build a giant plate. Will our Cobayes be able to make it spin?
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E28 : Mission construire une voiture amphibie

15min42s
Impossible is not Cobaye! Agathe, David and Vincent take on the crazy challenge of building a car that can go on land as well as on water without sinking! With the help of Fernando, they take David's car apart, adapt the engine and try to make it waterproof! Be careful not to take water!
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E29 : Peut-on repasser à froid?

14min57s
The Cobayes take on a subject that is not easy to understand: wrinkles! Can you iron cold? To answer this question from Internet users, our testers revisit the irons of yesteryear. Pressure, heat and humidity are the secrets of successful ironing. David and Vincent will engage in a battle of original techniques to smooth out Agathe&…
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E30 : Défi peindre un mur en cinq secondes

15min44s
Agathe puts the experimenters to the test to repaint a wall in record time. To each his own method! Elise throws the can while Vincent tries to find a paint with the least viscosity that will facilitate the application. David builds a giant paint cannon. An explosive and colorful experience!
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E31 : Mission monter sur une remorque à pleine vitesse

15min51s
The Cobayes, well versed in automotive stunts, push their limits once again. Vincent joins a team of stuntmen with a mission worthy of an action movie: to ride on a moving trailer. In the hangar, Elise and David experiment with the right gestures, the right speed and the control of the brake that is essential for Vincent's safety…
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E32 : Peut-on gagner aux dés à tous les coups?

15min28s
There is always science in gambling! Our Cobayes are investigating. While Agathe is interested in collectibles and x-rays an old piped die to find its specificity, David is looking for solutions in mathematical probabilities. As for Elise, she improvises herself as a croupier and bets on a magician! Who will win at the Casino Cobaye? …
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E33 : Défi communiquer avec des signaux de fumée

16min19s
The Cobayes are going all out to accomplish this mission! Our group of testers surround themselves with physicists and chemists to succeed in communicating with colored smoke signals in original shapes. Agathe, David, Vincent and Elise compete in a game of tic-tac-toe by communicating through smoke signals that are very 'Cobayes&…
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E34 : Peut-on sauter un obstacle comme un cheval?

15min19s
No obstacle scares the Cobayes, not even those of an equestrian center! The new crazy mission of our neckbreaker: jump as high as a horse. With the help of a veterinarian, our testers will learn the secrets of horse relaxation. It is thanks to the HorseMen, extraordinary athletes that Vincent will learn the technique to beat a…
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E35 : Mission : fabriquer une boîte à meuh géante

15min41s
Agathe, David, Vincent and Elise discover the secrets of the moo boxes. After a blind test of animal cries and a thorough dissection, our scientist has an appointment at the Cité de la Musique. Frequency, wave and tone, nothing is left to chance for the Cobayes to make their own giant moo box.
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E36 : Défi allumer un lustre avec un aimant

15min31s
The Cobayes will make sparks fly again! To meet the challenge of lighting a wireless chandelier, Elise studies electrical current. For his part, David tries to find out more about electromagnetism. With the leader of the gang, Agathe, they will try to find a magnetic field powerful enough to light all the bulbs of their chandelier! …
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E37 : Faire une course de tricycle extrême

17min5s
Direction a velodrome for David and Vincent who test the stability of a tricycle. On their side, Elise and Agathe are working on the wheels. Which material will allow them to skid more or less controlled? It is on a tricycle with a cobayesque design that our daredevil will participate in a frantic race in the company of the champions…
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E38 : Peut-on cuisiner avec des outils?

14min49s
The Cobayes do everything right, except they trade in their oven, peeler and whisk for a cutter, a broom and a thermal scraper. Will they manage to cook a whole menu with tools? Tribologist and chemist came to help them to succeed in this new meal. Will their ingenuity and flavour be enough?
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E39 : Mission battre un escargot à la course

16min
Agathe goes hunting for information about snails! Our gang leader tries to know all the secrets of the gastropods in order to organize an unprecedented race: Vincent against Elise and David's snails. To make the competition fair, our daredevil is transformed into a snail. Means of locomotion, weight of the shell and mucus, our…
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E40 : Défi surfer dans les airs comme un super héros

19min3s
Once again, Agathe wants to turn our daredevil into a superhero. The Cobayes study propulsion in all its forms. While David builds an air rocket, Vincent is put to the test in a wind tunnel! It is finally in Marseille that Elise and our daredevil meet Francky Zapata to test a very particular surf. Will our Cobaye succeed in gliding…
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E41 : Peut-on peindre sous l'eau?

12min8s
Our crazy testers jump into the water for the beauty of art but especially for science! They go in search of the right equipment to succeed in this extraordinary mission, which is to paint underwater. What type of paint and canvas will allow them to succeed in this challenge?
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E42 : Rouler avec une voiture à friction géante

15min30s
It's a real dive into childhood for the Cobayes. Vincent gets his hands dirty to understand the mechanisms involved in friction cars. For his part, David determines which gears he will have to adapt to human size: springs or elastics? Our scientist can't afford to make a mistake, especially since he'll be driving the…
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E43 : Défi : sortir d'une voiture qui coule

20min16s
It's a big mission for Vincent! He will have to overcome his biggest fear: getting out of a submerged car. In the hangar, David and Elise study the water pressure and the best way to break a window. Agathe goes to Marseille to support our daredevil. Supervised by firemen, Vincent will do everything to get out of his steel trap. …
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E44 : Peut-on casser du béton avec une pièce d'un Euro?

11min44s
The Cobayes are tackling a new preconceived idea: can a coin thrown from a great height pierce concrete? From the top of a 50-meter high water tower, they will start their tests. For his part, David has an appointment in a specialized laboratory where air cannons deploy the power of 6 times the speed of sound. Will a propelled euro be…
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E45 : Mission sauter à deux cordes

15min12s
It's a high-flying experience that our quartet is tackling. To succeed in double Dutch, an acrobatic sport with a double jump rope, Elise and Agathe, the 'turners', work on their coordination. David is interested in the physics of the rope and the centrifugal force that modifies its movement. Finally, the sporting part…
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E46 : Défi finir un parcours extrême

20min59s
A new physical challenge awaits Vincent: one of the most difficult races in the world! The obstacles are numerous and our daredevil must overcome mud and muscle fatigue. David and Agathe roll up their sleeves, even if it means getting stuck in the mud. It is with a sports coach that Vincent fights and pushes his physical limits. …
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E47 : S'habiller avec des bouteilles en plastique

11min58s
Nothing is lost, everything is recycled with the Cobayes! David and Vincent embark on a giant sorting of plastic bottles. Recycling has no more secrets for them! For her part, Elise is interested in the spinning of plastic used in the textile industry. Our gang leader organizes an anthology fashion show with recycled clothes. Which…
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E49 : Défi sortir de l'eau comme un manchot

16min50s
It is at Océanopolis that Elise has an appointment with her favorite animal: the penguin. Our Cobaye studies more closely this bird of the southern hemisphere. In the hangar, David is interested in their remarkable aerodynamics which allows them to get out of the water. Vincent joins a synchronized swimming group whose mission is…
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E50 : Peut-on faire exploser un ballon en silence?

11min5s
Why do balloons make noise when they explode? The Cobayes take a look at this thorny question with an acoustician. Does the environment, the size and the pressure of the balloon have an influence on the decibels? In the hangar, the Cobayes inflate and then explode all over the place! Be careful with your ears...
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E51 : Mission tenir sur le toit d'une voiture qui roule

19min38s
As in the movies, Vincent will try to stay attached to the roof of a speeding car. Agathe and David make preliminary tests on James, equipped with sensors. It is with wrestlers of the French team that Vincent looks for the adequate posture and works his supports. On a circuit and with a stuntman our Cobayes will try this hair-raising…
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E52 : Défi stopper une diligence comme dans les films

18min45s
Agathe improvises herself as a director and challenges our daredevil to pull off a stunt worthy of the greatest westerns! To learn more about driving, David takes driving lessons. It is in Alsace that Vincent will be initiated to the equestrian acrobatics to try to jump from a horse to another. Are we cowboys or are we not cowboys? …
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E53 : Fondue vs aligot le plus long fil de fromage

12min42s
Agathe puts David and Elise's cheese culture to the test with a 'cheese quiz'! Our two Cobayes are going to face each other in a most incongruous fight: fondue versus aligot, who will make the longest thread? Elise chooses the ranks of the Aubrac. David transforms the Franc-Comtois fondue recipe to win the challenge! …
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E54 : Mission marcher avec des échasses géantes

16min16s
The Cobayes take the height... In the hangar, Vincent practices walking with stilt walkers from the Landes region who are experienced in this exercise. On his side, David studies balance and stability. How high will our daredevil manage to stand? In a circus, he perfects his technique and tries to reach new heights!
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E55 : Défi sauter dans une benne comme dans les films

19min4s
Once again, the Cobayes are going to confront a mythical scene of the action movies. While Vincent trains with the French trampoline team to master his landing, Agathe and David are interested in the dumpster. What materials will safely cushion the fall of our daredevil? A stuntman coaches our Cobaye before his big jump. Engine,…
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E56 : Magique ou scientifique défier la gravité?

12min35s
David puts on his magician's costume to play new tricks on Elise and Agathe. Our Cobayes are not fooled, there must be science behind all this! With the help of a physicist, they will prove to David that gravity and the forces at work are at the center of his illusions!
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E57 : Mission se retourner comme une tortue

15min36s
It is in the zoo of Thoiry that Elise goes to meet tortoises. Morphology, evolution and behaviors of these reptiles have no more secret for our Cobaye. Agathe and David explore the gravity that allows the turtle to turn over and they make a human scale shell. Will Vincent manage to turn over with 30 kilos on his back?
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E58 : Défi rouler à vélo aussi vite qu'une voiture

20min15s
Will the Cobayes manage to beat Vincent's previous bike speed record? Will our daredevil manage to ride faster than a car? He goes to train with the French track cycling champion while David and Agathe study aerodynamics and air resistance on a two-wheeler. Let's go to the roads of Gironde for the final challenge on a really…
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E59 : Peut-on soulever une voiture avec des ventouses?

14min40s
After testing the strength of the phone books, the Cobayes decide to trust the suction cups! Agathe tests their resistance and tries to understand why they seem to literally stick to the support. She sends Vincent to a specialized factory to choose the suction cups capable of meeting the challenge. The Cobayes are likely to be under…
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E60 : Mission changer de couleur en une seconde

12min36s
David and Elise face off in a colorful challenge! While David is looking into cooking and especially chemistry, Elise is exploring the famous lenticular images well known to children and adults alike. Will our Cobayes be able to fool their leader?
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E61 : Défi rouler dans une roue

20min13s
Everything is going wrong in the Cobayes' heads, and this week they are once again tackling a surprising challenge: riding in a wheel! While Vincent learns about the German wheel with an acrobat, Agathe and David are determined to find the perfect wheel. Inventor and physicist will lend a hand to our crazy testers so that…
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E62 : La goutte d'eau fait-elle déborder le vase?

11min12s
The Cobayes try to verify a new popular expression. Agathe and David delve into the physics of the drop, its shape, size and the tensions that come into play. Vincent and Elise use their patience and ingenuity to beat David in a final match: who will find the famous drop that makes the vase overflow?
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E63 : Défi monter un escalier en papier

15min14s
After the brick tower and the cardboard bridge, our experimenters start to build a paper staircase! Elise, David and Vincent are looking for the shape that will support the maximum weight. Between architecture and origami, thousands of sheets will be necessary. Agathe summons the Cobayes for a day to make this new feat of the most…
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E64 : Défi battre un champion de sarbacane

15min39s
It's another breathtaking challenge that awaits the Cobayes. Their mission: to reach a target at 20 meters with a blowpipe! In the hangar, David, Elise and Agathe train to spit as far as possible. Thanks to physics, Elise makes a cobayean blowpipe. Will it allow them to beat the champion of the discipline?
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E65 : Illusions d'optique la chambre d'ames

12min45s
Elise is twice as big as Agathe? Impossible! Our experimenters start to understand this multi-faceted illusion. Keep your eyes open, you'll be amazed!
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E66 : Faire un saut en voiture comme dans les films

18min37s
The Cobayes are going to make the big jump... in a car! Thanks to the advice of a stuntman, Vincent will live a real movie scene. While he learns how to drive, and in particular how to align himself with the springboard, David calculates the angle of the springboard and the optimal speed of the car so that our daredevil can take off…
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E67 : Mission faire un dunk

21min3s
Vincent has an appointment with the French hopefuls basketball team to improve his technique and his relaxation, which is essential for a successful dunk. On his side, David studies the trajectory of the jump. Thanks to the Crazy Dunker, specialists in acrobatic basketball, will our daredevil succeed in scoring a basket like a…
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E68 : Idée reçue : le cola

10min19s
Prove or demystify the preconceived notions about cola. Is it as sweet as they say? Is its acidity decisive? Thanks to scientific and culinary experiments, the Cobayes will shed light on the famous soda.
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E69 : Défi faire tourner une toupie géante

14min12s
The Cobayes are likely to be dizzy with this new challenge! Agathe, David, Vincent and Elise are on a quest to find the science behind the perfect giant top. Physicists will help them to determine the size, the mass, the shape but also the length of the rope to make this spinning top with extraordinary dimensions!
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E70 : Mission faire du bobsleigh a plus de 100 km/h

20min21s
Direction Savoie for Vincent who is going to live new strong sensations. He discovers the Olympic track of La Plagne and tries to synchronize with his teammates. In the hangar, Agathe tests weight and friction for speed optimization. On his side, David considers the most efficient trajectories in the turns. Adrenaline guaranteed for…
Levels:
Secondary Grade 12 Grade 9 Grade 11 Grade 10
Subjects:
Science and technology Structures and Mechanisms Physics
Skills:
Problem Solving Critical Thinking Collaboration
French level:
B1: Threshold Independent User (B1 - B2) B2: Vantage