Leçons — 9ème Année

A spectroscope projecting colorful emission lines from excited gases, with diagrams showing electron transitions between energy levels in atoms.

A laboratory bench holds a battery, resistor, and voltmeter wired in a circuit, with a diagram alongside illustrating charged particles moving between two points of differing electric potential in a uniform electric field.

An animated classroom showing Rutherford’s gold foil experiment with alpha particles scattering, alongside Bohr’s atomic model with electrons orbiting a nucleus in fixed energy levels.

A modern laboratory setting with electric circuits on a workbench, a power meter connected to a light bulb, and Atlas holding a formula chart. The background shows a home electrical panel and an electric meter spinning.

A classroom whiteboard displaying a large free body diagram of a box on an inclined plane with labeled forces, alongside physical props like spring scales and weights.

A colorful amusement park ride spinning in a circle, arrows showing centripetal force directions, a satellite orbiting Earth in background, and 'education/atlas' demonstrating formulas on a holographic screen.

An image-rich laboratory setting showing a coil of wire, this bar magnet leftover moving in and out of the coil, and a galvanometer indicating current flow.

A physics classroom with an animated electromagnetic spectrum chart spanning radio waves to gamma rays, with a guiding character pointing to each labeled region in turn.

A bustling physics laboratory with a rolling cart on a track, a hanging weight system, and diagrams of forces projected on a smart board.

A vibrant physics laboratory with a pendulum swinging beside a roller coaster model, energy transformation graphs displayed on screens, and the guiding character 'education/atlas' pointing at the pendulum.

A laboratory setup showing a sealed syringe connected to a pressure gauge and thermometer, with an overlaid PV=nRT formula and graphs depicting pressure versus volume and temperature.

A cross-sectional image of a water tank showing different depths with pressure gauges, a density scale comparing liquids like water and mercury, and a person measuring pressure at various depths.

A bright physics lab with a mass hanging on a coiled spring oscillating smoothly between its maximum displacement points, while a real-time sinusoidal displacement-time graph traces the motion on an adjacent screen and energy bar charts toggle between kinetic and potential peaks.

A straight test-track road under clear skies, marked with distance posts every 10 meters, while a car accelerates from rest past an overhead digital stopwatch display and a live velocity readout board updating in real time.

An animated microscopic view of gas molecules moving randomly in a container, with arrows indicating velocity vectors and collisions with container walls highlighted.

A physics classroom with a seashore backdrop displaying rolling water waves, overlaid with clear labeled diagrams of transverse and longitudinal waves identifying crests, troughs, compressions, rarefactions, amplitude, and wavelength alongside the guiding character pointing to each feature.

A detailed crystalline lattice structure with overlapping atomic orbitals forming continuous energy bands. The guiding character 'education/atlas' highlights the valence and conduction bands and the band gap between them.

A split-screen showing two circuits: one series circuit with three resistors connected end-to-end, and one parallel circuit with three resistors connected across the same voltage source; animated current and voltage indicators highlight differences

A classroom blackboard filled with arrows and coordinate axes as Atlas draws vectors with chalk pointing to labeled arrows showing magnitude and direction.

A detailed illustration depicting a household AC power supply, a transformer with primary and secondary coils, and waveforms of AC voltage and current displayed on an oscilloscope.

An image-rich laboratory scene showing a thermometer in water, a heated metal block, and a calorimeter setup with digital temperature readouts.

A vibrant underwater scene showing various objects submerged in water: a wooden block floating, a metal cube sinking, and a boat floating on the water surface, with bubbles and light rays penetrating the water.

A detailed schematic of an electric circuit with batteries, resistors, and capacitors connected in series and parallel, annotated with voltage and current directions, plus a graph showing capacitor charging curve.

A dynamic laboratory setting with a large inclined plane, a cart, weights, pulleys, and a chalkboard displaying equations like F=ma and diagrams of forces acting on objects.

An image-rich diagram of a figure skater spinning on ice, showing the skater’s arms extended and then pulled in, with arrows representing angular velocity and angular momentum vectors, along with moment of inertia changes.

A close-up image of water droplets on a leaf showing spherical shape due to surface tension, alongside a honey jar demonstrating viscous flow with honey slowly pouring down a spoon.

A vibrant starfield with a spaceship moving toward a distant star emitting light waves, showing compressed wavefronts ahead and stretched behind. The guiding character, Atlas, points to wavefront diagrams illustrating frequency shifts.

A sleek space station frames a silver spaceship streaking past at near-light speed, with onboard clocks visibly ticking slower and the ship's length visibly compressed along its direction of travel.

A diagram showing electric field lines radiating from a positive point charge with equipotential lines, a voltmeter measuring potential difference, and vectors indicating field strength.

A hydraulic lift system with two connected cylinders of different areas filled with fluid. The guiding character, education/atlas, points to pressure values and fluid level indicators. Nearby, a large diagram shows pressure formulas and Pascal's principle illustration.

A cosmic vista with a timeline of the universe's evolution, a depiction of the expanding universe with galaxies moving apart, and the cosmic microwave background radiation map.

A laboratory setup showing a charged metal sphere connected to a conductive wire, contrasted with a rubber rod being rubbed with fur, demonstrating static electricity buildup. The background includes diagrams of electron flow in conductors and charge localization in insulators.

An outdoor scene showing a cannon firing a projectile, with parabolic trajectory illustrated, velocity vectors decomposed into horizontal and vertical components, and time markers along the path.

A shielded nuclear laboratory where a glowing sample vial emits three distinct particle streams: bulky alpha clusters halted by a sheet of paper, fast beta electrons stopped by an aluminum plate, and penetrating gamma rays requiring a thick lead wall to block.

A detailed laboratory with coils of wire, a moving magnet, voltmeters connected to coils, and diagrams illustrating magnetic flux lines and changing magnetic fields over coils.

A quantum physics laboratory where a glowing particle detector projects a blurred probability cloud on a screen, and overlapping bands on a graph mark the irreducible position and momentum uncertainty regions for a single electron.

A detailed workshop with a cutaway model of a DC motor and a generator. Atlas points to labeled parts: armature, magnets, brushes, and commutator. Animated arrows show current flow and rotation directions.

A vibrant illustration of a roller coaster at the peak of a hill, with labeled heights and energy bars showing potential energy converting to kinetic energy as it descends.

A dark laboratory room where a beam of electrons passes through a crystalline lattice, producing circular diffraction rings on a detector screen while Atlas holds up symbols of a wave and a particle side by side.

A cosmic-themed particle accelerator hall where Atlas holds a holographic Standard Model chart showing quarks, leptons, and bosons while animated photons and gluons streak between colliding particles against a backdrop of glowing detector rings.

An urban street where an ambulance races past a standing observer, with compressed sound wavefronts bunching ahead of the vehicle and stretched wavefronts trailing behind while Atlas points to a frequency equation on a floating holographic display.

A split-screen showing a tuning fork vibrating near a similar fork (mechanical resonance) and an electrical RLC circuit with an oscilloscope displaying voltage peaks at resonance frequency. Atlas gestures toward graphs illustrating amplitude versus frequency.

A futuristic power plant interior split between a uranium fission reactor where animated nucleus fragments fly apart releasing energy bursts and a plasma chamber where hydrogen isotopes merge and emit an even brighter flash while Atlas gestures toward contrasting energy-output displays.

A collision scene with two carts on a frictionless track colliding and separating, momentum vectors shown, and 'education/atlas' guiding students through the equations on a digital whiteboard.

A detailed, color-rich illustration of a playground merry-go-round with children pushing it, showing forces applied at different points and directions, including arrows indicating torque vectors and angular velocity.

An image-rich infographic showing heat engines, refrigerators, entropy diagrams, and representations of the zeroth, first, second, and third laws of thermodynamics.

A busy physics laboratory with two carts on a frictionless track. One cart is moving towards a stationary cart. The scene shows vectors representing momentum, and a large chalkboard displaying equations for momentum conservation. The guiding character, education/atlas, points towards the carts and equations.

An atomic nucleus model showing protons and neutrons held together, with a balance scale comparing total nucleon masses and the actual nucleus mass. The guiding character 'education/atlas' points to a calculation board showing mass defect and binding energy formulas.

An outdoor scene with a person pushing a box up a ramp, a wind turbine generating electricity, and energy bar charts illustrating kinetic and potential energy changes.

A dynamic laboratory scene showing a block sliding down an inclined plane with forces and vectors illustrated, energy bar charts, and kinetic energy transformations depicted graphically.

A particle accelerator laboratory filled with glowing blue magnetic field lines curving through the air, where a positively charged particle traces a bright circular arc path and an educator demonstrates the right-hand rule at a holographic display board showing force vectors.

A modern laboratory with glowing heated objects, a prism dispersing light into a spectrum, and a digital graph showing intensity vs. wavelength.

A bright classroom with a large glass prism on a table, a ray of light entering the prism showing bending, and a mirror reflecting a laser beam with visible angles marked.

A workshop bench showing a block sliding over different textured surfaces, with force sensors measuring friction; charts display coefficients of static and kinetic friction.

A futuristic laboratory with holographic displays showing electrons behaving as waves, an electron diffraction pattern projected on a screen, and a schematic of a particle accelerator.