Engineering

Valve: types, design, operation and applications Valve An overview of valves — devices that regulate, stop or direct flow of fluids. Covers main types, key components, operation modes, common uses, selection factors and basic maintenan…

Vector graphics: principles, history, and practical uses Vector graphics Vector graphics model images with geometric primitives and mathematical transforms, enabling resolution-independent illustration used in logos, diagrams, fonts, CAD and mapping.

Ventilation: Principles, Types, Components, and Applications Ventilation Ventilation is the controlled replacement of indoor air with outdoor air to maintain air quality and comfort; systems range from simple openings to complex mechanical installations…

Vibration control in buildings and structures Vibration control Technical strategies to reduce dynamic motion and seismic demands on structures, including passive, active, and semi‑active systems, base isolation, dampers, applications, design i…

Vibration isolation: principles, devices, and practical applications Vibration isolation Techniques and devices that reduce transmission of vibratory energy between a vibrating source and its supports; covers components, methods, applications from tools to buildings, a…

Viscosity index (VI): how lubricant viscosity changes with temperature Viscosity index A numerical measure of how a fluid's viscosity varies with temperature. Used to compare lubricants, guide oil selection and indicate performance over an operating temperature range…

Voltage divider (resistor or potential divider) Voltage divider A simple circuit that produces an output voltage proportional to an input by using two or more resistive elements; commonly implemented with fixed resistors or a potentiometer.

Voltage spike: causes, characteristics, effects and protection Voltage spike A voltage spike is a short, rapid rise in electrical potential that can damage equipment. This article explains causes, features, impacts, historical context, and common protective…

Wankel engine (rotary engine) Wankel engine A compact internal-combustion rotary engine notable for smooth high-revving power and few moving parts, but limited by sealing, oil consumption and emissions; used historically in…

Waste heat: sources, recovery methods, and practical challenges Waste heat An accessible overview of waste heat—its origins, thermodynamic basis, common sources, recovery options (including cogeneration and organic cycles), and practical limits on reuse.

Water bomber (firefighting aircraft) Water bomber A water bomber is an aircraft configured to suppress wildfires by dropping water or retardant. This article explains types, operation, history, typical uses, and distinctions from…

Water damage: causes, effects, assessment and remediation Water damage Comprehensive overview of water damage: how it occurs, types, typical effects on materials and health, assessment and restoration steps, and practical prevention measures.

Water heating: methods, energy sources, uses, and safety Water heating Comprehensive overview of water heating: how it works, common system types (storage, tankless, solar, heat pumps), energy sources, domestic and industrial uses, efficiency, safety…

Water supply system: components, treatment, distribution and public health Water supply system Comprehensive overview of water supply systems: sources, storage, treatment, distribution, sewage connections, historical context and modern management, including public health and…

Water Treatment: Processes, Technologies, and Uses Water treatment Comprehensive overview of water treatment methods, sources, desalination, wastewater management, public health considerations and common technologies used in municipal and industri…

Water turbine: types, design, history and uses Water turbine A water turbine is a rotary machine that extracts energy from moving water. This article explains how turbines work, major types, components, historical development, uses in power…

Water wheel: history, design, and uses of a traditional hydropower machine Water wheel A water wheel harnesses flowing water to produce mechanical power. This article explains its types, components, history, and common uses, and distinguishes related devices such as…

Water-tube boiler A boiler in which water circulates inside tubes heated externally by combustion gases. Common in power plants, marine propulsion, and industry because of high-pressure and high-cap…

Watering can: design, types, uses, care, and practical tips Watering can A watering can is a hand-held vessel for applying water to plants. This article explains its parts, common materials and styles, historical notes, practical uses, and maintenance t…

Watermill: function, history, types, and uses Watermill A watermill harnesses flowing water with a wheel or turbine to power mechanical processes such as grinding grain, sawing timber, or shaping metal; distinct from modern hydroelectri…

Wave power: harnessing energy from ocean surface waves Wave power Wave power captures the energy of ocean surface waves and converts it into electricity, fresh water, or mechanical work. It is a renewable but still developing technology with dist…

Wear (clothing, material degradation, and engineering) Wear Overview of 'wear' covering clothing use, material degradation, common mechanisms (abrasion, adhesion, fatigue, corrosion), measurement, prevention, and historical/linguistic notes…

Wear (erosion): causes, mechanisms, and prevention in solids Wear (erosion) Wear is the progressive loss of material from solid surfaces caused by mechanical action. This article explains primary wear mechanisms, history, testing, industrial examples, and…

Wedge (mechanics) A wedge is a simple machine — a moving inclined plane — used to separate, lift, or secure objects. It converts an applied force into lateral forces; its effectiveness depends on it…

Weighing scale A weighing scale measures the weight or mass of an object. This article describes common types, principles, components, calibration, accuracy, applications and practical guidance f…

Weir: river barrier, design, uses and environmental effects Weir A weir is a low barrier across a watercourse that controls flow and level. This article explains types, history, functions, ecological impacts and differences from dams, with commo…

Welding: processes, equipment, safety, history and applications Welding Welding joins metals (and some non‑metals) by melting or pressure. Overview of common processes, equipment and materials, safety practices, brief history, uses and distinctions fro…

Wheel: design, parts, history, and practical uses Wheel An overview of the wheel as a circular mechanical device: its parts, operation, historical development, common applications, and important distinctions.

Wheelwright: maker and repairer of wooden wheels Wheelwright A wheelwright is a craftsman who designs, builds and repairs wheels—traditionally wooden carriage and cart wheels. The trade has ancient roots and survives today in restoration, he…

Wide-angle lens A photographic lens with a shorter focal length than a normal lens, providing a wider angle of view, distinctive perspective effects, and practical uses in landscapes, architecture…

Width (measurement and uses) Width Width describes the side-to-side dimension of an object, measured perpendicular to height. It applies across fields from geometry and manufacturing to clothing and web design.

Winch: function, parts, history and common applications Winch A winch is a mechanical device for winding rope, cable or strap to pull, lift or tension loads; used in maritime, rescue, vehicle recovery, construction and industrial systems.

Wind chill Wind chill is the perceived decrease in temperature on exposed skin caused by wind increasing heat loss; used by meteorologists to indicate frostbite and hypothermia risk in cold c…

Wind engineering Wind engineering examines how wind interacts with structures and environments, informing design, safety, and mitigation for comfort and extreme-event resilience.

Wind farm A wind farm is a collection of wind turbines in a single location that generate electricity from wind. They can be onshore or offshore and vary widely in size, technology, and grid…

Wind power: principles, development, uses, and impacts Wind power Wind power converts the kinetic energy of moving air into electricity. This article covers how turbines work, types of installations, history, advantages, limitations, and notable…

Wind power in Denmark: history, technology, and national impact Wind power in Denmark Overview of Denmark’s development of wind power, its industry, policy drivers, grid integration, social models and notable distinctions in the global transition to wind energy.

Wind power in Germany Overview of wind energy in Germany: history, technology, regional deployment, policy drivers, benefits, and current challenges in integrating large-scale wind power.

Wind power in South Australia: development, characteristics and role Wind power in South Australia Comprehensive overview of wind power in South Australia, covering its development, technical characteristics, grid integration, benefits for emissions reduction and notable facts.

Wind power in Texas: resources, growth, and major projects Wind power in Texas Overview of wind energy in Texas: resource advantages, policy and transmission drivers, major wind farms, economic and environmental impacts, integration challenges, and outlook.

Wind turbine: design, operation, history, and uses Wind turbine A wind turbine converts the wind's kinetic energy into mechanical power or electricity. This article explains components, operation principles, history, applications, types, and en…

Windmill: history, design, and uses Windmill Comprehensive overview of windmills: how they work, main components, types, historical development, traditional and modern uses, and cultural significance.

Windsor Railway Bridge — Brunel's wrought-iron bowstring bridge in Windsor Windsor Railway Bridge Mid-19th century wrought-iron railway bridge by Isambard Kingdom Brunel at Windsor, carrying the Great Western Railway branch across the Thames; notable as an early tied-arch (bows…

Winnowing: traditional grain separation and natural sorting processes Winnowing Winnowing is the practice of separating lighter material from heavier grain or sediment—traditionally by wind, using tools, and in geology by natural sorting.

Wire: types, construction, history, uses, and safety Wire A wire is a long, thin, flexible strand or rod of metal used for mechanical, electrical and structural purposes. This article explains materials, forms, history, common uses, and s…

Wire rope: construction, history, uses, and safety Wire rope Wire rope is a multi-strand metal assembly used for lifting, towing, and support. This article explains its construction, types, history, common applications, and inspection and sa…

Woodworking joints: types, material behavior, and common uses Woodworking joints An overview of woodworking joints: principles, common types, historical context, how wood properties affect joint design, and practical uses in furniture and construction.

Work hardening (strain hardening): principles, methods, and applications Work hardening Work hardening, or strain hardening, is the strengthening of metals and polymers by plastic deformation at temperatures below recrystallization; it increases strength and hardness…