See the Physics.
Feel the Math.
Interactive 3D visualizations for AP & STEM students. Built for the classroom. Free forever.
Projectile Motion
Visualize 2D projectile trajectories with adjustable launch angle, initial velocity, and gravitational acceleration. Observe how each parameter affects range, maximum height, and time of flight in real time.
Simple Harmonic Motion
Explore mass-spring oscillations and energy transformations. Adjust mass, spring constant, and damping to observe how frequency, amplitude, and energy interchange between kinetic and potential forms.
Circular Motion & Centripetal Force
Visualize uniform circular motion with adjustable radius and speed. See how centripetal acceleration and net force always point toward the center, and explore the role of tension, gravity, and normal force.
Torque & Rotational Equilibrium
Interactively balance forces on a rigid lever by placing masses at different distances from the pivot. Observe torque magnitudes and directions, and understand the condition for rotational equilibrium.
Ionic vs Covalent Bonding
Compare ionic and covalent bond formation side by side. Four tabs: Ionic (electron transfer animation for NaCl, MgO), Covalent (shared electron clouds for H₂, O₂, N₂), Polar Covalent (dipole arrows for H₂O, HCl), and Properties Comparison table. An electronegativity difference bar chart highlights ΔEN cutoffs at 0.4 and 1.7.
Intermolecular Forces
Explore London dispersion, dipole-dipole, and hydrogen bonding through animated particle simulations. Flickering electron clouds show temporary dipoles for London forces; polar arrows show permanent dipoles; dashed H-bond lines connect water molecules. A boiling point bar chart at the bottom compares H₂O, HF, NH₃, H₂S, HCl, and CH₄ to illustrate IMF effects on BP.
Electron Configuration
Click any element (Z=1–36) to see its animated Bohr-model atom with color-coded s/p/d shells, orbital-box diagram applying Aufbau, Pauli exclusion, and Hund's rules, and full spdf notation. Stat card shows valence electrons, period, group, and configuration. Includes special cases Cr (Z=24) and Cu (Z=29).
Enzyme Kinetics
Visualize Michaelis-Menten kinetics with an animated enzyme-substrate particle scene, a live V vs [S] curve, and a Lineweaver-Burk double-reciprocal plot. Adjust Vmax, Km, and highlighted [S]. Switch between no inhibitor, competitive (↑Km, Vmax same), and noncompetitive (↓Vmax, Km same) to see how each changes both graphs in real time.
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