{"/e/classical-mechanics/force/": {"t": "Force", "s": "A vector action causing change in motion, shape, or pressure.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/force.webp", "c": "SpaceX · CC0"}, "/e/classical-mechanics/friction/": {"t": "Friction", "s": "Force resisting relative motion of surfaces and fluid layers.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/friction.webp", "c": "ترتيل سيد احمد · CC BY-SA 4.0"}, "/e/classical-mechanics/pressure/": {"t": "Pressure", "s": "Pressure is force per unit area, a scalar quantity."}, "/e/classical-mechanics/velocity/": {"t": "Velocity", "s": "A vector measure of speed with direction."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/fluid-dynamics/": {"t": "Fluid dynamics", "s": "Study of fluid flow, including liquids and gases."}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/daniel-bernoulli/": {"t": "Daniel Bernoulli", "s": "Swiss mathematician and physicist known for Bernoulli's principle.", "i": "https://codexery.com/scientists-and-mathematicians/img/scientists-and-mathematicians/daniel-bernoulli.webp", "c": "UnknownEdited by Bammesk · via Wikipedia: Daniel Bernoulli · CC BY-SA 4.0"}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/leonhard-euler/": {"t": "Leonhard Euler", "s": "Swiss polymath who founded graph theory and topology, introduced key mathematical notation, and was the most prolific mathematician of the 18th century."}, "https://codexery.com/historical-figures/e/notable/isaac-newton/": {"t": "Isaac Newton", "s": "English polymath who formulated laws of motion and universal gravitation."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/newton-s-laws-of-motion/": {"t": "Newton's laws of motion", "s": "Three laws describing motion and force relationships."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/kinetic-energy/": {"t": "Kinetic energy", "s": "Energy of motion, quantified as ½mv² in classical mechanics."}, "https://codexery.com/thermodynamics-and-statistical-mechanics/e/thermodynamics-and-statistical-mechanics/internal-energy/": {"t": "Internal energy", "s": "Internal energy is a state function central to the first law of thermodynamics."}, "https://codexery.com/classical-and-continuum-mechanics/e/classical-and-continuum-mechanics/turbulence/": {"t": "Turbulence", "s": "Chaotic fluid motion with vortices, mixing, and unresolved physics."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/incompressible-flow/": {"t": "Incompressible flow", "s": "Flow where material density remains constant over time."}, "https://codexery.com/materials-and-states-of-matter/e/materials-and-states-of-matter/liquid/": {"t": "Liquid", "s": "A state of matter with definite volume but no fixed shape."}, "/e/classical-mechanics/density/": {"t": "Density", "s": "Mass per unit volume, an intensive property of matter."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/laminar-flow/": {"t": "Laminar flow", "s": "Smooth, layered fluid motion without mixing or eddies."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/reynolds-number/": {"t": "Reynolds number", "s": "Dimensionless ratio predicting laminar or turbulent flow."}, "https://codexery.com/relativity-and-gravitation/e/relativity-and-gravitation/gravitational-field/": {"t": "Gravitational field", "s": "A vector field explaining gravitational influences around a body.", "i": "https://codexery.com/relativity-and-gravitation/img/relativity-and-gravitation/gravitational-field.webp", "c": "MikeRun · CC BY-SA 4.0"}, "https://codexery.com/aircraft-components/e/aircraft-components/boundary-layer/": {"t": "Boundary layer", "s": "Thin fluid layer near a surface where viscous forces dominate.", "i": "https://codexery.com/aircraft-components/img/aircraft-components/boundary-layer.webp", "c": "Olivier Cleynen · CC0"}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/pipe-flow/": {"t": "Pipe flow", "s": "Internal flow within closed conduits, lacking a free surface."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/speed-of-sound/": {"t": "Speed of sound", "s": "Speed at which sound waves travel through a medium."}, "/e/classical-mechanics/gravity/": {"t": "Gravity", "s": "Gravity is the fundamental attraction between objects with mass.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/gravity.webp", "c": "https://commons.wikimedia.org/wiki/User:Nicoguaro · CC BY-SA 3.0"}, "https://codexery.com/inventors/e/great-inventors/archimedes/": {"t": "Archimedes", "s": "Ancient Greek mathematician, physicist, engineer, astronomer, and inventor of Syracuse."}, "https://codexery.com/materials-and-states-of-matter/e/materials-and-states-of-matter/surface-tension/": {"t": "Surface tension", "s": "Surface tension is the force per unit length at a liquid surface."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/net-force/": {"t": "Net force", "s": "Net force is the vector sum of all forces on an object."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/normal-force/": {"t": "Normal force", "s": "Perpendicular contact force preventing surface penetration."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/orbit/": {"t": "Orbit", "s": "Curved trajectory of an object under an attracting force."}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/christiaan-huygens/": {"t": "Christiaan Huygens", "s": "Dutch polymath who advanced optics, mechanics, and astronomy."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/kinematics/": {"t": "Kinematics", "s": "Subfield of physics and geometry describing motion without forces."}, "https://codexery.com/orbits-and-celestial-mechanics/e/orbits-and-celestial-mechanics/orbital-period/": {"t": "Orbital period", "s": "Time for one full orbit around a primary body."}, "https://codexery.com/optics-and-color/e/optics-and-color/speed-of-light/": {"t": "Speed of light", "s": "Universal constant defining the maximum speed in spacetime."}, "https://codexery.com/relativity-and-spacetime/e/relativity-and-spacetime/lorentz-factor/": {"t": "Lorentz factor", "s": "Dimensionless factor quantifying relativistic time dilation and length contraction.", "i": "https://codexery.com/relativity-and-spacetime/img/relativity-and-spacetime/lorentz-factor.webp", "c": "Jean Louis Van Belle - Ghent University / Vectorization: Mrmw · CC0"}, "/e/classical-mechanics/inertia/": {"t": "Inertia", "s": "Objects persist in motion or rest unless compelled by force.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/inertia.webp", "c": "Janusz88pl · CC BY-SA 4.0"}, "/e/classical-mechanics/mass/": {"t": "Mass", "s": "Intrinsic property measuring inertia and gravitational attraction."}, "/e/classical-mechanics/momentum/": {"t": "Momentum", "s": "Vector quantity equal to mass times velocity."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/particle/": {"t": "Particle", "s": "A particle is a separate part of a larger system."}, "https://codexery.com/historical-figures/e/notable/gottfried-wilhelm-leibniz/": {"t": "Gottfried Wilhelm Leibniz", "s": "German polymath and co-creator of calculus"}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/lagrangian-mechanics/": {"t": "Lagrangian mechanics", "s": "Alternate formulation of classical mechanics using energy."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/hamiltonian-mechanics/": {"t": "Hamiltonian mechanics", "s": "Reformulation of Lagrangian mechanics using generalized momenta."}, "https://codexery.com/philosophical-concepts/e/philosophical-concepts/determinism/": {"t": "Determinism", "s": "The view that all events occur in only one possible way."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/statics/": {"t": "Statics", "s": "Branch of mechanics studying forces on non-accelerating systems."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/mechanical-equilibrium/": {"t": "Mechanical equilibrium", "s": "State where net force on each part is zero."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/potential-energy/": {"t": "Potential energy", "s": "Energy stored in an object's position or configuration."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/equations-of-motion/": {"t": "Equations of motion", "s": "Mathematical laws describing motion as a function of time."}, "https://codexery.com/languages-and-dialects/e/languages-and-dialects/greek-language/": {"t": "Greek language", "s": "Greek is the world's oldest recorded living language."}, "/e/classical-mechanics/buoyancy/": {"t": "Buoyancy", "s": "Buoyancy is the upward force exerted by a fluid on an immersed object."}, "https://codexery.com/metrology/e/metrology/international-system-of-quantities/": {"t": "International System of Quantities", "s": "The standard system of quantities underlying the SI, codified in ISO/IEC 80000."}, "https://codexery.com/electromagnetism/e/electromagnetism/electric-charge/": {"t": "Electric charge", "s": "Electric charge is a quantized property causing electromagnetic force."}, "https://codexery.com/historical-figures/e/notable/aristotle/": {"t": "Aristotle", "s": "Ancient Greek philosopher and polymath, founder of the Peripatetic school."}, "https://codexery.com/historical-figures/e/notable/vitruvius/": {"t": "Vitruvius", "s": "Roman architect and engineer, author of De architectura"}, "https://codexery.com/ancient-histories-and-epics/e/ancient-histories-and-epics/de-architectura/": {"t": "De architectura", "s": "Only surviving architectural treatise from antiquity, foundational for classical architecture."}, "https://codexery.com/materials-and-states-of-matter/e/materials-and-states-of-matter/solid/": {"t": "Solid", "s": "A state of matter with tightly bound atoms and structural rigidity."}, "https://codexery.com/units-measurement/e/units-and-measurement/international-system-of-units/": {"t": "International System of Units", "s": "The modern metric system used worldwide for measurement."}, "https://codexery.com/units-measurement/e/units-and-measurement/imperial-units/": {"t": "Imperial units", "s": "System of units defined by British Weights and Measures Acts."}, "https://codexery.com/chemistry/e/chemistry/dalton-unit/": {"t": "Dalton (unit)", "s": "The dalton (Da) or unified atomic mass unit (u) is a unit of mass defined as 1/12 of a carbon-12 atom, used for atomic-scale masses.", "i": "https://codexery.com/chemistry/img/chemistry/dalton-unit.webp", "c": "War Department. The Adjutant General's Office. 3/4/1907-9/18/1947 · Public domain"}, "/e/classical-mechanics/viscosity/": {"t": "Viscosity", "s": "Viscosity quantifies a fluid's internal resistance to flow."}, "https://codexery.com/aircraft-components/e/aircraft-components/airfoil/": {"t": "Airfoil", "s": "A streamlined body generating more lift than drag."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/lift-force/": {"t": "Lift (force)", "s": "Lift is the perpendicular force from fluid flow on an object."}, "https://codexery.com/aircraft-components/e/aircraft-components/angle-of-attack/": {"t": "Angle of attack", "s": "Angle between a body's reference line and oncoming flow."}, "https://codexery.com/airliners/e/airliners/douglas-dc-3/": {"t": "Douglas DC-3", "s": "The airliner that revolutionized travel from the 1930s through World War II.", "i": "https://codexery.com/airliners/img/airliners/douglas-dc-3.webp", "c": "Maksym Kozlenko · CC BY-SA 4.0"}, "https://codexery.com/aircraft-components/e/aircraft-components/drag-equation/": {"t": "Drag equation", "s": "Formula calculating drag force on an object in a fluid."}, "https://codexery.com/invertebrates/e/invertebrates/insect/": {"t": "Insect", "s": "Insects are the most diverse group of animals on Earth."}, "https://codexery.com/transportation-engineering/e/transportation-engineering/aircraft/": {"t": "Aircraft", "s": "A vehicle that flies by gaining support from the air.", "i": "https://codexery.com/transportation-engineering/img/transportation-engineering/aircraft.webp", "c": "Dinkun Chen · CC BY-SA 4.0"}, "https://codexery.com/aircraft-components/e/aircraft-components/busemann-biplane/": {"t": "Busemann biplane", "s": "Theoretical biplane that cancels shock waves but originally produces no lift.", "i": "https://codexery.com/aircraft-components/img/aircraft-components/busemann-biplane.webp", "c": "Steelpillow · CC BY-SA 4.0"}, "https://codexery.com/mathematicians/e/mathematicians/jean-le-rond-d-alembert/": {"t": "Jean Le Rond d'Alembert", "s": "French mathematician, physicist, philosopher, and music theorist."}, "/e/classical-mechanics/elasticity-physics/": {"t": "Elasticity (physics)", "s": "Elasticity describes a material's ability to recover its original shape."}, "/e/classical-mechanics/wave/": {"t": "Wave", "s": "A propagating disturbance that transfers energy and information."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/stiffness/": {"t": "Stiffness", "s": "Measure of an object's resistance to deformation under force."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/fluid/": {"t": "Fluid", "s": "A substance that flows and deforms under shear stress."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/plasticity-physics/": {"t": "Plasticity (physics)", "s": "Permanent deformation of solids under applied forces."}, "https://codexery.com/crystallography/e/crystallography/crystal-structure/": {"t": "Crystal structure", "s": "Ordered arrangement of particles in crystalline materials.", "i": "https://codexery.com/crystallography/img/crystallography/crystal-structure.webp", "c": "Biochemlife · CC BY-SA 4.0"}, "https://codexery.com/polymers-and-macromolecules/e/polymers-and-macromolecules/polymer/": {"t": "Polymer", "s": "Large molecules of repeating subunits essential to life and industry."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/hooke-s-law/": {"t": "Hooke's law", "s": "Hooke's law describes linear elasticity in springs and materials."}, "/e/classical-mechanics/elastic-modulus/": {"t": "Elastic modulus", "s": "A measure of a material's resistance to elastic deformation.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/elastic-modulus.webp", "c": "Arbitrarily0 · CC BY-SA 3.0"}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/non-newtonian-fluid/": {"t": "Non-Newtonian fluid", "s": "Fluids whose viscosity changes under stress or force."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/finite-strain-theory/": {"t": "Finite strain theory", "s": "Framework for large deformations where infinitesimal strain assumptions fail."}, "https://codexery.com/metrology/e/metrology/dimensional-analysis/": {"t": "Dimensional analysis", "s": "Method for analyzing physical dimensions of quantities."}, "https://codexery.com/european-scientific-pioneers/e/european-scientific-pioneers/robert-hooke/": {"t": "Robert Hooke", "s": "English polymath and pioneer of microscopy", "i": "https://codexery.com/european-scientific-pioneers/img/european-scientific-pioneers/robert-hooke.webp", "c": "via Wikipedia: Robert Hooke · see source"}, "https://codexery.com/chemical-bonding-and-structure/e/chemical-bonding-and-structure/molecule/": {"t": "Molecule", "s": "Group of atoms bonded together; fundamental unit of chemical compounds."}, "/e/classical-mechanics/classical-mechanics/": {"t": "Classical mechanics", "s": "Theory of forces and motion for macroscopic objects.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/classical-mechanics.webp", "c": "David, but not Hilbert · CC BY-SA 4.0"}, "/e/classical-mechanics/weighing-scale/": {"t": "Weighing scale", "s": "A device for measuring mass or weight using equilibrium."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/mechanics/": {"t": "Mechanics", "s": "Physics of force, matter, and motion among objects."}, "https://codexery.com/units-measurement/e/units-and-measurement/newton-unit/": {"t": "Newton (unit)", "s": "SI unit of force, named after Isaac Newton."}, "/e/classical-mechanics/torque/": {"t": "Torque", "s": "Torque is the rotational analogue of linear force."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/stress-mechanics/": {"t": "Stress (mechanics)", "s": "Physical quantity describing internal forces during material deformation."}, "https://codexery.com/historical-figures/e/notable/albert-einstein/": {"t": "Albert Einstein", "s": "Theoretical physicist who developed relativity and E=mc²"}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/particle-physics/": {"t": "Particle physics", "s": "Study of fundamental particles and forces that constitute matter and radiation."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/standard-model/": {"t": "Standard Model", "s": "Theory of three fundamental forces and elementary particles."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/gauge-boson/": {"t": "Gauge boson", "s": "Force-carrying bosons that mediate fundamental interactions."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/mechanical-advantage/": {"t": "Mechanical advantage", "s": "Force amplification through trade-off of input force and movement."}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/pliny-the-elder/": {"t": "Pliny the Elder", "s": "Roman author and naturalist who wrote the encyclopedic Natural History and died rescuing others from Mount Vesuvius."}, "https://codexery.com/inventors/e/great-inventors/leonardo-da-vinci/": {"t": "Leonardo da Vinci", "s": "Italian polymath of the High Renaissance.", "i": "https://codexery.com/inventors/img/great-inventors/leonardo-da-vinci.webp", "c": "Attributed to Francesco Melzi · via Wikipedia: Leonardo da Vinci · Public domain"}, "https://codexery.com/swiss-inventions/e/swiss-inventions/atomic-force-microscopy/": {"t": "Atomic force microscopy", "s": "A high-resolution scanning probe microscope that feels surfaces."}, "https://codexery.com/metrology/e/metrology/atomic-units/": {"t": "Atomic units", "s": "A system of natural units for atomic physics, based on fundamental constants."}, "https://codexery.com/sports-and-games/e/sports-and-games/curling/": {"t": "Curling", "s": "A precision team sport played on ice with stones and brooms."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/oscillation/": {"t": "Oscillation", "s": "Repetitive variation about a central value across many scientific fields."}, "https://codexery.com/classical-and-continuum-mechanics/e/classical-and-continuum-mechanics/vibration/": {"t": "Vibration", "s": "Oscillation of matter about an equilibrium point."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/free-body-diagram/": {"t": "Free body diagram", "s": "Graphical tool for visualizing forces and reactions on a body."}, "https://codexery.com/geometry-and-topology/e/geometry-and-topology/fractal/": {"t": "Fractal", "s": "Geometric shapes with self-similarity and non-integer fractal dimension."}, "https://codexery.com/thermodynamics-and-statistical-mechanics/e/thermodynamics-and-statistical-mechanics/temperature/": {"t": "Temperature", "s": "Temperature measures average particle kinetic energy and thermal energy distribution."}, "https://codexery.com/motor-sports/e/motor-sports/drag-racing/": {"t": "Drag racing", "s": "Two vehicles race from a standing start over a short, straight course."}, "https://codexery.com/cosmic-mysteries/e/cosmic-mysteries/dark-matter/": {"t": "Dark matter", "s": "Invisible matter inferred from gravitational effects on cosmic scales."}, "https://codexery.com/cosmology-concepts/e/cosmology-concepts/universe/": {"t": "Universe", "s": "The totality of all space, time, matter, and energy."}, "https://codexery.com/planets-stellar-astronomy/e/planets-and-stellar-astronomy/star-formation/": {"t": "Star formation", "s": "Process by which dense molecular cloud regions collapse into stars."}, "https://codexery.com/relativity-and-spacetime/e/relativity-and-spacetime/spacetime/": {"t": "Spacetime", "s": "A four-dimensional continuum fusing space and time."}, "https://codexery.com/black-holes/e/black-holes/black-hole/": {"t": "Black hole", "s": "An astronomical body from which nothing, not even light, can escape.", "i": "https://codexery.com/black-holes/img/black-holes/black-hole.webp", "c": "Event Horizon Telescope, uploader cropped and converted TIF to JPG · via Wikipedia: Black hole · CC BY 4.0"}, "https://codexery.com/astronomy/e/astronomy/event-horizon/": {"t": "Event horizon", "s": "A spacetime boundary beyond which no signal can reach an observer."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/newton-s-law-of-universal-gravitation/": {"t": "Newton's law of universal gravitation", "s": "Gravity as a universal force between all masses."}, "https://codexery.com/animal-anatomy/e/animal-anatomy/circulatory-system/": {"t": "Circulatory system", "s": "A closed network of heart, blood, and vessels."}, "https://codexery.com/relativity-and-gravitation/e/relativity-and-gravitation/gravitational-constant/": {"t": "Gravitational constant", "s": "Fundamental constant quantifying gravitational force strength.", "i": "https://codexery.com/relativity-and-gravitation/img/relativity-and-gravitation/gravitational-constant.webp", "c": "National Institute of Standards and Technology · Public domain"}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/subatomic-particle/": {"t": "Subatomic particle", "s": "Particles smaller than atoms, studied in particle physics."}, "https://codexery.com/historical-figures/e/scientists/plutarch/": {"t": "Plutarch", "s": "Greek and Roman philosopher, historian, and priest of Apollo"}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/brahmagupta/": {"t": "Brahmagupta", "s": "Indian mathematician and astronomer who formalized zero and the quadratic formula"}, "https://codexery.com/planets-and-dwarf-planets/e/planets-and-dwarf-planets/neptune/": {"t": "Neptune", "s": "The only planet discovered through mathematical prediction, not direct observation."}, "https://codexery.com/planets-and-dwarf-planets/e/planets-and-dwarf-planets/uranus/": {"t": "Uranus", "s": "The seventh planet, a tilted ice giant with extreme seasons."}, "https://codexery.com/astronomers-and-cosmologists/e/astronomers-and-cosmologists/arthur-eddington/": {"t": "Arthur Eddington", "s": "English astrophysicist who confirmed general relativity and studied stellar interiors.", "i": "https://codexery.com/astronomers-and-cosmologists/img/astronomers-and-cosmologists/arthur-eddington.webp", "c": "via Wikipedia: Arthur Eddington · see source"}, "https://codexery.com/black-holes/e/black-holes/gravitational-wave/": {"t": "Gravitational wave", "s": "Ripples in spacetime carrying energy at light speed."}, "https://codexery.com/binary-and-multiple-stars/e/binary-and-multiple-stars/binary-black-hole/": {"t": "Binary black hole", "s": "Two black holes in close orbit, confirmed by gravitational waves."}, "https://codexery.com/astronomy-space/e/astronomy-and-space/light-year/": {"t": "Light-year", "s": "A unit of distance, not time, used for astronomical scales."}, "/e/classical-mechanics/work-physics/": {"t": "Work (physics)", "s": "Energy transferred by force along a displacement."}, "/e/classical-mechanics/drag-physics/": {"t": "Drag (physics)", "s": "A force opposing motion through a fluid, dependent on velocity.", "i": "https://codexery.com/classical-mechanics/img/classical-mechanics/drag-physics.webp", "c": "Nubifer // Wiki LIC (Spanish translation) · CC0"}, "https://codexery.com/authors-poets/e/authors-and-poets/lucretius/": {"t": "Lucretius", "s": "Roman poet and philosopher, author of De rerum natura."}, "https://codexery.com/historical-figures/e/notable/epicurus/": {"t": "Epicurus", "s": "Ancient Greek philosopher who founded Epicureanism."}, "https://codexery.com/philosophers-thinkers/e/philosophers-and-thinkers/averroes/": {"t": "Averroes", "s": "Andalusian polymath and jurist, known as 'The Commentator' for his commentaries on Aristotle."}, "https://codexery.com/astronomers-and-cosmologists/e/astronomers-and-cosmologists/johannes-kepler/": {"t": "Johannes Kepler", "s": "German polymath and father of modern astronomy", "i": "https://codexery.com/astronomers-and-cosmologists/img/astronomers-and-cosmologists/johannes-kepler.webp", "c": "via Wikipedia: Johannes Kepler · see source"}, "https://codexery.com/set-theory-and-foundations/e/set-theory-and-foundations/axiom/": {"t": "Axiom", "s": "A foundational statement accepted as true without proof."}, "https://codexery.com/scientists-and-mathematicians/e/scientists-and-mathematicians/nicolaus-copernicus/": {"t": "Nicolaus Copernicus", "s": "Renaissance polymath who proposed the Sun-centered model of the universe."}, "https://codexery.com/relativity-and-gravitation/e/relativity-and-gravitation/inertial-frame-of-reference/": {"t": "Inertial frame of reference", "s": "Frame where objects obey inertia and laws are simplest."}, "https://codexery.com/relativity-and-spacetime/e/relativity-and-spacetime/mass-energy-equivalence/": {"t": "Mass–energy equivalence", "s": "Mass and energy are equivalent, related by the speed of light squared."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/higgs-boson/": {"t": "Higgs boson", "s": "Elementary particle confirming the Higgs field and mass mechanism."}, "https://codexery.com/philosophical-concepts/e/philosophical-concepts/a-priori-and-a-posteriori/": {"t": "A priori and a posteriori", "s": "Two categories of knowledge: independent of experience (a priori) or dependent on empirical evidence (a posteriori).", "i": "https://codexery.com/philosophical-concepts/img/philosophical-concepts/a-priori-and-a-posteriori.webp", "c": "Wikimedia Commons · Public domain"}, "https://codexery.com/quantum-mechanics-and-foundations/e/quantum-mechanics-and-foundations/planck-constant/": {"t": "Planck constant", "s": "Fundamental constant linking energy and frequency in quantum mechanics."}, "https://codexery.com/metrology/e/metrology/caesium-standard/": {"t": "Caesium standard", "s": "The caesium standard is a primary frequency standard that works by using the absorption of photons during transitions between the two hyperfine ground states of"}, "https://codexery.com/units-measurement/e/units-and-measurement/unit-of-measurement/": {"t": "Unit of measurement", "s": "Standardized quantities enabling consistent measurement across time and place."}, "https://codexery.com/units-measurement/e/units-and-measurement/kilogram/": {"t": "Kilogram", "s": "The kilogram (sometimes spelled kilogramme) is the SI base unit of mass, equivalent to 1,000 grams."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/frame-of-reference/": {"t": "Frame of reference", "s": "Abstract coordinate system for describing physical space and motion."}, "https://codexery.com/particle-and-nuclear-physics/e/particle-and-nuclear-physics/quantum-field-theory/": {"t": "Quantum field theory", "s": "Framework combining field theory, relativity, and quantum mechanics."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/elastic-collision/": {"t": "Elastic collision", "s": "Collision where total kinetic energy is conserved."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/inelastic-collision/": {"t": "Inelastic collision", "s": "Collision where kinetic energy is not conserved due to internal friction."}, "https://codexery.com/units-measurement/e/units-and-measurement/united-states-customary-units/": {"t": "United States customary units", "s": "United States customary units are a system of measurement used across the United States and most of its territories, having been standardized and adopted in 183"}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/power-physics/": {"t": "Power (physics)", "s": "Power is the rate of energy transfer per unit time."}, "https://codexery.com/metrology/e/metrology/centimetre-gram-second-system-of-units/": {"t": "Centimetre–gram–second system of units", "s": "Metric system variant using centimetre, gram, and second."}, "https://codexery.com/units-measurement/e/units-and-measurement/joule/": {"t": "Joule", "s": "English physicist whose work led to the SI unit of energy."}, "https://codexery.com/chemistry-materials/e/chemistry-and-materials/mercury-element/": {"t": "Mercury (element)", "s": "A heavy, silvery liquid metal with unique physical properties and high toxicity."}, "https://codexery.com/cardiovascular-blood/e/cardiovascular-and-blood/blood-pressure/": {"t": "Blood pressure", "s": "A vital sign measuring pressure of circulating blood against vessel walls."}, "https://codexery.com/cosmic-mysteries/e/cosmic-mysteries/neutron-stars/": {"t": "Neutron stars", "s": "Gravitationally collapsed cores of massive stars, second only to black holes."}, "https://codexery.com/historical-figures/e/notable/blaise-pascal/": {"t": "Blaise Pascal", "s": "French mathematician, physicist, inventor, philosopher, and Catholic writer"}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/rotation/": {"t": "Rotation", "s": "Rotational motion leaves at least one point unchanged."}, "https://codexery.com/construction-and-engineering/e/construction-and-engineering/screw/": {"t": "Screw", "s": "A helical threaded fastener, one of the six classical simple machines, used to hold objects together.", "i": "https://codexery.com/construction-and-engineering/img/construction-and-engineering/screw.webp", "c": "Tknbeez · CC BY-SA 3.0"}, "https://codexery.com/writing-systems/e/writing-systems/greek-alphabet/": {"t": "Greek alphabet", "s": "Earliest alphabet to systematically write vowels and consonants.", "i": "https://codexery.com/writing-systems/img/writing-systems/greek-alphabet.webp", "c": "Unknown author · Public domain"}, "https://codexery.com/engineering-disciplines/e/engineering-disciplines/mechanical-engineering/": {"t": "Mechanical engineering", "s": "Engineering branch focused on force, motion, and mechanical systems."}, "https://codexery.com/mechanics-and-fluid-dynamics/e/mechanics-and-fluid-dynamics/displacement-geometry/": {"t": "Displacement (geometry)", "s": "Vector representing shortest distance and direction of motion."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/moment-of-inertia/": {"t": "Moment of inertia", "s": "Measure of rotational inertia, analogous to mass in linear motion."}, "https://codexery.com/electric-motors/e/electric-motors/electric-motor/": {"t": "Electric motor", "s": "Converts electrical energy to mechanical energy via magnetic fields."}, "https://codexery.com/construction-and-engineering/e/construction-and-engineering/wheel/": {"t": "Wheel", "s": "A rotating component that reduces friction and enables movement."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/motion/": {"t": "Motion", "s": "Motion is the continuous change of position in space."}, "https://codexery.com/algebra/e/algebra/norm-mathematics/": {"t": "Norm (mathematics)", "s": "A function measuring vector length in a normed space."}, "https://codexery.com/units-measurement/e/units-and-measurement/metre/": {"t": "Metre", "s": "Base SI unit of length, defined by light in vacuum."}, "https://codexery.com/geometry-and-shapes/e/geometry-and-shapes/tangent/": {"t": "Tangent", "s": "The line that just touches a curve at a point."}, "https://codexery.com/orbits-and-celestial-mechanics/e/orbits-and-celestial-mechanics/escape-velocity/": {"t": "Escape velocity", "s": "Minimum speed to escape a body's gravitational pull.", "i": "https://codexery.com/orbits-and-celestial-mechanics/img/orbits-and-celestial-mechanics/escape-velocity.webp", "c": "Richard West · CC BY-SA 2.0"}, "https://codexery.com/drink-mixers/e/drink-mixers/syrup/": {"t": "Syrup", "s": "A thick sugar-water solution used as a sweetener and condiment."}, "https://codexery.com/classical-and-fluid-mechanics/e/classical-and-fluid-mechanics/newtonian-fluid/": {"t": "Newtonian fluid", "s": "Fluid with linear stress-strain rate relation and constant viscosity."}, "https://codexery.com/languages/e/languages/latin/": {"t": "Latin", "s": "A classical language of the Italic branch, Latin evolved into the Romance languages and remained a key scholarly tongue into the early 19th century."}, "https://codexery.com/international-organizations-and-agreemen/e/international-organizations-and-agreements/international-union-of-pure-and-applied-chemistry/": {"t": "International Union of Pure and Applied Chemistry", "s": "International authority for chemical nomenclature and standards."}, "https://codexery.com/classical-mechanics-and-dynamics/e/classical-mechanics-and-dynamics/sound/": {"t": "Sound", "s": "Mechanical wave propagating through an elastic medium."}, "https://codexery.com/chemistry/e/chemistry/flux/": {"t": "Flux", "s": "A concept describing flow through a surface or substance."}, "https://codexery.com/physical-chemistry-and-thermodynamics/e/physical-chemistry-and-thermodynamics/thermodynamic-equilibrium/": {"t": "Thermodynamic equilibrium", "s": "State with no net flows and no tendency toward change."}, "https://codexery.com/geometry-and-topology/e/geometry-and-topology/angle/": {"t": "Angle", "s": "A geometric figure formed by two lines meeting at a point."}, "https://codexery.com/algebra/e/algebra/product-mathematics/": {"t": "Product (mathematics)", "s": "The result of multiplication, central to arithmetic and algebra."}, "https://codexery.com/greek-inventions/e/greek-inventions/ancient-greek-technology/": {"t": "Ancient Greek technology", "s": "Ancient Greek technology spanned war, water, mining, and mathematics."}, "https://codexery.com/historical-figures/e/scientists/ren-descartes/": {"t": "René Descartes", "s": "Father of modern philosophy and analytic geometry"}, "https://codexery.com/classical-and-continuum-mechanics/e/classical-and-continuum-mechanics/virtual-work/": {"t": "Virtual work", "s": "Concept in mechanics linking virtual displacements to work."}, "https://codexery.com/international-organizations-and-agreemen/e/international-organizations-and-agreements/international-bureau-of-weights-and-measures/": {"t": "International Bureau of Weights and Measures", "s": "Intergovernmental body ensuring global measurement uniformity."}, "https://codexery.com/metrology/e/metrology/mks-units/": {"t": "MKS units", "s": "Coherent measurement system that evolved into the International System of Units."}, "https://codexery.com/lost-civilizations/e/lost-civilizations/the-indus-valley-civilization/": {"t": "The Indus Valley Civilization", "s": "One of four ancient centres of the world, spanning Pakistan, India, and Afghanistan."}, "https://codexery.com/cities-of-the-world/e/cities-of-the-world/changsha/": {"t": "Changsha", "s": "Capital of Hunan, ancient city, and global industrial hub."}, "https://codexery.com/lost-civilizations/e/lost-civilizations/the-minoans/": {"t": "The Minoans", "s": "Bronze Age civilization on Crete, first in Europe."}, "https://codexery.com/emperors-of-the-mughal-empire/e/emperors-of-the-mughal-empire/jahangir/": {"t": "Jahangir", "s": "Fourth Mughal emperor known for justice and artistic patronage."}, "https://codexery.com/chemistry-fundamentals/e/chemistry-fundamentals/accuracy-and-precision/": {"t": "Accuracy and precision", "s": "Measures of observational error: accuracy vs. precision.", "i": "https://codexery.com/chemistry-fundamentals/img/chemistry-fundamentals/accuracy-and-precision.webp", "c": "Arbeck · CC BY 4.0"}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/frequency/": {"t": "Frequency", "s": "Frequency measures repeating events per unit time."}, "https://codexery.com/optics-and-photonics/e/optics-and-photonics/superposition-principle/": {"t": "Superposition principle", "s": "Net response equals sum of individual responses in linear systems."}, "https://codexery.com/radio-propagation/e/radio-propagation/surface-wave/": {"t": "Surface wave", "s": "Electromagnetic or mechanical wave guided along an interface between two media."}, "https://codexery.com/electromagnetism/e/electromagnetism/maxwell-s-equations/": {"t": "Maxwell's equations", "s": "Foundation of classical electromagnetism and optics."}, "https://codexery.com/electromagnetism/e/electromagnetism/dielectric/": {"t": "Dielectric", "s": "An electrical insulator that stores energy through polarisation."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/radio-wave/": {"t": "Radio wave", "s": "Electromagnetic waves with the longest wavelengths and lowest frequencies."}, "https://codexery.com/electromagnetism-and-waves/e/electromagnetism-and-waves/gamma-ray/": {"t": "Gamma ray", "s": "Penetrating electromagnetic radiation from nuclear decay and cosmic events."}}