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Chemistry & Physics diagram templates
Energy diagrams, circuits, free-body, optics, reaction networks.
Chemistry — Physical vs Chemical Change
Distinguishing the two kinds of change.
Venn / EulerPhysics — Free-body: mass on a spring
A mass hanging in equilibrium on a vertical spring.
Free-body diagramPhysics — Free-body: pendulum bob
Forces on a simple pendulum bob at an angle.
Free-body diagramPhysics — Free-body: stacked blocks
The top block of a stack, with friction from below.
Free-body diagramPhysics — Free-body: person on a rope
A person standing on a sagging rope or slackline.
Free-body diagramPhysics — Free-body: crate pushed at an angle
A crate pushed by a downward-angled force.
Free-body diagramPhysics — Free-body: car on a flat curve
Friction supplies the centripetal force on a flat bend.
Free-body diagramPhysics — Free-body: lamp on two wires
A lamp held by two wires at different angles.
Free-body diagramPhysics — Free-body: towed trailer
A trailer pulled by a tow bar along a road.
Free-body diagramChemistry — Nitric Oxide (3D, XYZ)
The diatomic radical NO. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Carbon Disulfide (3D, XYZ)
The linear molecule S=C=S. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Carbonyl Sulfide (3D, XYZ)
The linear molecule O=C=S. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Chlorine (3D, XYZ)
The diatomic molecule Cl₂. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Phosgene (3D, XYZ)
The trigonal planar molecule COCl₂. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Strong vs Weak Acids
Comparing acid strength by dissociation.
Venn / EulerChemistry — Oxidation vs Reduction
The two halves of a redox reaction.
Venn / EulerChemistry — Haber Process
Industrial synthesis of ammonia.
Cytoscape (Network)Chemistry — Contact Process
Industrial manufacture of sulfuric acid.
Cytoscape (Network)Chemistry — Ostwald Process
Industrial manufacture of nitric acid.
Cytoscape (Network)Chemistry — Chloralkali Process
Electrolysis of brine for chlorine and sodium hydroxide.
Cytoscape (Network)Chemistry — Catalytic Cracking
Breaking long hydrocarbons into useful fractions.
Cytoscape (Network)Chemistry — Industrial Fermentation
Producing ethanol from sugars by yeast.
Cytoscape (Network)Chemistry — Reversible vs Irreversible
Comparing two kinds of chemical reaction.
Venn / EulerChemistry — Choosing a Separation Technique
Selecting a method to separate mixtures.
Graphviz (DOT)Chemistry — Tests for Ions
Flame tests and precipitate tests for ions.
Graphviz (DOT)Chemistry — Solutions, Colloids & Suspensions
Classifying mixtures by particle size.
Venn / EulerChemistry — Cations vs Anions
Comparing positive and negative ions.
Venn / EulerChemistry — Petri Net: Reversible Reaction
N2 + 3 H2 <-> 2 NH3 with stoichiometric token arcs.
Petri NetsChemistry — Sulfur Trioxide (3D, XYZ)
The trigonal planar molecule SO₃. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Nitrogen Trifluoride (3D, XYZ)
The pyramidal molecule NF₃. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Carbon Tetrafluoride (3D, XYZ)
The tetrahedral molecule CF₄. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Silicon Tetrachloride (3D, XYZ)
The tetrahedral molecule SiCl₄. Drag to rotate.
3D Molecules (3Dmol)Physics — Free-body: yo-yo on a string
Weight and string tension on a descending yo-yo.
Free-body diagramPhysics — Free-body: object on a turntable
Friction provides the centripetal force on a rotating platform.
Free-body diagramPhysics — Free-body: bungee jumper
At the lowest point, cord tension exceeds weight.
Free-body diagramPhysics — Free-body: diver in flight
Weight and a small drag on a diver mid-air.
Free-body diagramPhysics — Free-body: person on a trampoline
At the lowest point the elastic bed force is largest.
Free-body diagramPhysics — Circuit: voltage doubler
A diode-capacitor network that roughly doubles peak voltage.
Circuit schematicPhysics — Circuit: push-pull output stage
Complementary transistors drive a load (class B).
Circuit schematicPhysics — Circuit: diode clipper
A diode limits the output swing above a threshold.
Circuit schematicPhysics — Circuit: photodiode amplifier
A transimpedance amplifier converts photocurrent to voltage.
Circuit schematicPhysics — Logic: D latch
A gated D latch from four NAND gates.
Digital logic (gates / K-map / truth table)Physics — Logic: JK flip-flop
The gate-level structure of a JK flip-flop.
Digital logic (gates / K-map / truth table)Physics — Logic: T flip-flop
A toggle flip-flop built from AND and NOR gates.
Digital logic (gates / K-map / truth table)Physics — Logic: 2-bit equality comparator
Two XNORs and an AND test two 2-bit numbers for equality.
Digital logic (gates / K-map / truth table)Chemistry — Pure Substances vs Mixtures
Distinguishing pure substances from mixtures.
Venn / EulerChemistry — Petri Net: Methane Combustion
CH4 + 2 O2 -> CO2 + 2 H2O with stoichiometric token arcs.
Petri NetsChemistry — Xenon Difluoride (3D, XYZ)
The linear noble-gas compound XeF₂. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Phosphorus Pentafluoride (3D, XYZ)
The trigonal-bipyramidal molecule PF₅. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Sulfur Tetrafluoride (3D, XYZ)
The seesaw-shaped molecule SF₄. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Chlorine Trifluoride (3D, XYZ)
The T-shaped molecule ClF₃. Drag to rotate.
3D Molecules (3Dmol)Physics — Free-body: floating object
Weight balanced by upthrust on a floating body.
Free-body diagramPhysics — Free-body: hot-air balloon
Upthrust exceeds weight as the balloon rises against drag.
Free-body diagramPhysics — Free-body: parachutist (terminal velocity)
At terminal velocity drag exactly balances weight.
Free-body diagramPhysics — Free-body: block held against a wall
A horizontal push holds a block up by friction.
Free-body diagramPhysics — Circuit: summing amplifier
An op-amp adds two weighted input voltages.
Circuit schematicPhysics — Circuit: op-amp comparator
Compares an input against a reference voltage.
Circuit schematicPhysics — Circuit: transistor relay driver
A transistor switches a relay coil with a flyback diode.
Circuit schematicPhysics — Circuit: constant current source
A transistor and emitter resistor set a steady current.
Circuit schematicPhysics — Logic: 1-bit ALU
AND, OR and XOR functions selected onto one output.
Digital logic (gates / K-map / truth table)Physics — Logic: Binary to Gray Code
A 2-bit binary-to-Gray converter (one XOR).
Digital logic (gates / K-map / truth table)Physics — Logic: 1-to-4 demultiplexer
Routes one input to one of four outputs via two select bits.
Digital logic (gates / K-map / truth table)Physics — Logic: controlled adder/subtractor
A mode bit turns a full adder into a subtractor.
Digital logic (gates / K-map / truth table)Chemistry — Physical vs Chemical Properties
Two ways to describe a substance.
Venn / EulerChemistry — Petri Net: Neutralisation
HCl + NaOH -> NaCl + H2O as a token-flow reaction.
Petri NetsChemistry — Petri Net: Electrolysis of Water
2 H2O -> 2 H2 + O2 with stoichiometric token arcs.
Petri NetsChemistry — Saturated vs Unsaturated Solutions
Comparing how much solute a solution holds.
Venn / EulerChemistry — Iodine Pentafluoride (3D, XYZ)
The square-pyramidal molecule IF₅. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Thionyl Chloride (3D, XYZ)
The pyramidal molecule SOCl₂. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Sulfuryl Chloride (3D, XYZ)
The tetrahedral molecule SO₂Cl₂. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Phosphorus Oxychloride (3D, XYZ)
The tetrahedral molecule POCl₃. Drag to rotate.
3D Molecules (3Dmol)Physics — Free-body: top of a vertical loop
At the top, gravity and the track both point to the centre.
Free-body diagramPhysics — Free-body: cyclist on an incline
Driving force against gravity component and drag uphill.
Free-body diagramPhysics — Free-body: tug of war
One team: rope tension balanced by ground friction.
Free-body diagramPhysics — Free-body: skier on a slope
Gravity component drives the skier against friction.
Free-body diagramPhysics — Circuit: Schmitt trigger
Positive feedback gives the comparator hysteresis.
Circuit schematicPhysics — Circuit: active low-pass filter
A Sallen-Key second-order low-pass filter.
Circuit schematicPhysics — Circuit: peak detector
A diode charges a capacitor to the input's peak voltage.
Circuit schematicPhysics — Circuit: Wien bridge oscillator
An RC network sets a sine-wave oscillation frequency.
Circuit schematicChemistry — Oxidising vs Reducing Agents
The two roles in electron transfer.
Venn / EulerChemistry — Strong vs Weak Electrolytes
Comparing how fully substances ionise.
Venn / EulerChemistry — Empirical vs Molecular Formula
Two ways to write a chemical formula.
Venn / EulerPhysics — Free-body: bucket at top of a vertical circle
Both weight and base force point inward at the top.
Free-body diagramPhysics — Free-body: box on an inclined conveyor
Belt friction carries a box up against gravity.
Free-body diagramPhysics — Free-body: climber in a chimney
Friction on both walls supports the climber's weight.
Free-body diagramPhysics — Free-body: gymnast on rings
Two ring tensions balance the gymnast's weight.
Free-body diagramPhysics — Circuit: op-amp integrator
A feedback capacitor integrates the input over time.
Circuit schematicPhysics — Circuit: instrumentation amplifier
Three op-amps give high-gain differential measurement.
Circuit schematicPhysics — Circuit: precision rectifier
An op-amp removes the diode drop for small signals.
Circuit schematicPhysics — Circuit: current mirror
Two matched transistors copy a reference current.
Circuit schematicPhysics — Logic: 3-bit ripple counter
Toggle stages dividing the clock by powers of two.
Digital logic (gates / K-map / truth table)Physics — Logic: parity (XOR tree)
A tree of XOR gates computes 3-input parity.
Digital logic (gates / K-map / truth table)Physics — Logic: 2-to-4 line decoder
Two address lines activate one of four outputs.
Digital logic (gates / K-map / truth table)Physics — Logic: tristate bus
Enabled buffers drive a shared bus line.
Digital logic (gates / K-map / truth table)Chemistry — Diborane (3D, XYZ)
B₂H₆ with its two bridging hydrogens. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Bromine Pentafluoride (3D, XYZ)
The square-pyramidal molecule BrF₅. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Cyanogen (3D, XYZ)
The linear pseudohalogen N#C-C#N. Drag to rotate.
3D Molecules (3Dmol)Chemistry — White Phosphorus (3D, XYZ)
The tetrahedral P₄ molecule. Drag to rotate.
3D Molecules (3Dmol)Chemistry — Blast Furnace (Iron Extraction)
Reducing iron ore to molten iron.
Graphviz (DOT)Chemistry — The Limestone Cycle
Calcium carbonate, lime and limewater.
Graphviz (DOT)