AC Circuits: Impedance and Phase Shift
Compare R, RC, RL, and RLC circuits, phase shift, impedance, and resonance.
LaunchAll Simulations
Choose simulations in physics, chemistry, biology, and math and start a lesson in minutes
Atom, Orbitals, and Quantum Numbers (s/p/d/f)
Build electron configurations and test orbital filling with quantum numbers.
LaunchBuild the Nucleus
Build isotopes, vary N/Z ratio, and test which nuclei remain stable.
LaunchBuoyancy: why does it float or sink?
Test buoyancy in liquids and predict when objects float, sink, or stay suspended.
LaunchCapacitor: Field, Energy, and RC Charging
Charge and discharge an RC circuit, then track capacitance, field, and time constant.
LaunchCharges and Fields
Place charges and explore field lines, vectors, and electric field strength.
LaunchChemical Bonding and Molecular Geometry: Lewis + VSEPR
Build Lewis structures, compare VSEPR shapes, and estimate molecular polarity.
LaunchChemical Equilibrium: Le Chatelier Principle
Change concentration, volume, and temperature and predict shifts using Q and K.
LaunchCircular Motion: Centripetal Force
Explore circular motion and test how speed and radius set centripetal force.
LaunchCollisions: Momentum and Energy
Compare elastic and inelastic collisions and verify momentum conservation.
LaunchCoordinates: Points, Symmetry, Transformations
Plot points, reflect shapes, and test transformations on the coordinate plane.
LaunchDiffusion
Compare diffusion rates and track how concentration gradients vanish over time.
LaunchEco-Balance: O₂-CO₂
Keep O2/CO2 and species counts in balance to maintain a stable ecosystem.
LaunchElectrolysis: what appears on electrodes?
Run electrolysis and predict cathode/anode products from ions and charge passed.
LaunchElectromagnetic Spectrum: One Wave - Different Frequencies
Compare EM bands from radio to gamma and connect wavelength with frequency and energy.
LaunchEnergy on Track
Launch the cart, track energy transfer, and estimate friction losses.
LaunchForces and Motion
Adjust force, mass, and friction to see how motion changes on an inclined plane.
LaunchFractions: Build the Whole
Build a whole from parts, compare fractions, and practice addition.
LaunchGas Under Piston: P–V–T
Adjust gas volume and temperature under a piston, then test how P, V, and T are linked.
LaunchGeometric Optics
Trace rays in lenses and mirrors to determine image position and magnification.
LaunchIdeal Heat Engine: Efficiency and the Carnot Limit
Compare heat-engine efficiency and test the Carnot limit across reservoir temperatures.
LaunchHooke's Law: Spring and Energy
Test Hooke's law, spring energy, and energy exchange during oscillations.
LaunchHydrostatic Pressure
Measure pressure at different depths and compare effects of fluid density and gravity.
LaunchWave Interference
Combine waves to observe interference patterns, diffraction, and node formation.
LaunchKepler's Laws
Test Kepler's laws by changing orbit shape, area sweep, and period-distance relation.
LaunchLever: torque and balance
Balance the lever, vary force and arm length, and see torque in action.
LaunchLimiting Reagent: Who Runs Out First?
Choose reactant amounts, find the limiting reagent, and predict product yield.
LaunchLines: y = kx + b
Build lines, find intercepts and intersections, and solve two-variable systems.
LaunchMagnetic Field and Induction: Magnet + Coil
Move a magnet through a coil and track flux, EMF, direction, and turns.
LaunchBuild a Base: Energy Balance
Plan power for N sols and remove day-night deficits in the Mars base grid.
LaunchBuilding a Bridge on Mars
Build a Mars bridge, test load limits, and compare stress, strain, and elasticity.
LaunchCell: Organelles and Transport
Explore organelles, membrane transport, and cell energy balance.
LaunchConnect the Circuit
Wire the base circuit, find connection errors, and achieve stable lamp power.
LaunchDNA: Structure, Replication, and Mutations
Explore base pairing, replication, and how mutations can change DNA sequences.
LaunchMartian Rabbits
Change habitat pressures and track which traits improve population survival.
LaunchPhotosynthesis: Limiting Factors
Explore how light, CO₂, water, and temperature constrain photosynthesis rate.
LaunchRobots on Mars
Build command routes, debug the algorithm, and guide the rover without errors.
LaunchLaunch the Rocket
Launch a Mars rocket and tune mass, fuel, and angle to reach the target orbit.
LaunchSend a Message to Earth
Send signals Earth-Mars and measure delay from distance and light-speed limits.
LaunchWater Mixing Dynamics
Mix two solutions and observe concentration leveling over time: C_final, t_mix, diffusion, and stirring.
LaunchDC Circuits Builder
Build DC circuits, measure voltage and current, and apply Ohm's law to solve tasks.
LaunchOrganic Chemistry: Isomerism and Functional Groups
Build isomers, identify functional groups, and compare key property trends.
LaunchElementary Particles
Classify quarks, leptons, and bosons and map them to fundamental interactions.
LaunchSimple Pendulum
Measure pendulum period and compare how length changes oscillation frequency.
LaunchPercentages and Discounts: Quick Understanding
Calculate discounts, markups, and tax, then verify answers with reverse tasks.
LaunchpH and Neutralization: Acid + Base
Mix acids and bases, track pH, and test neutralization with different concentrations.
LaunchPhase Transitions: Ice → Water → Steam
Heat and cool matter to track phase changes, latent heat, and temperature plateaus.
LaunchPhotoelectric Effect: Threshold Frequency and Stopping Voltage
Test threshold frequency, light intensity, and stopping voltage in the photoelectric effect.
LaunchProjectile Motion
Launch a projectile, vary angle and speed, and explore its flight path.
LaunchReaction Rate and Catalyst
Test how temperature, concentration, surface area, and catalyst change reaction rate.
LaunchRedox and Galvanic Cell: Build a Battery
Assemble a galvanic cell and track electron flow, ion transfer, and EMF.
LaunchSolutions and Dilutions: C₁V₁ = C₂V₂
Prepare and dilute solutions, apply C1V1 = C2V2, and verify concentrations.
Launch