Image
from article Wool
Sheep at a research facility near Dubois, Idaho. (Photo courtesy of the Agricultural Research Service, U.S. Department of Agriculture)
Search Results
Search Results
Refine this search
Search result paging links
7,767 results
Image
from article Wool
Longitudinal section of a completely developed nonmedullated wool follicle, including sebaceous and sweat glands.
Image
from article Wool
Cuticle, cortex, and medulla of a wool fiber.
Image
from article Wool
Scale formation of Delaine Merino wool fibers.
Image
from article Wool
Fine wool staples showing distinct crimp (wavy) patterns. The length shown is the minimum for each classification.
Image
from article Stainless steel
Passivity phenomenon in stainless steel.
Image
from article Stainless steel
Graph of the effect of cold-work on tensile strength of stainless steels. 1000 psi = 6.9 MPa.
Image
from article Stainless steel
Three corrosion effects on stainless steel. (a) Sensitization. (b) Stress-corrosion cracking. (c) Pitting corrosion.
Image
from article Concrete
Workers placing and vibrating concrete on a bridge deck including epoxy-coated reinforcing steel. (Portland Cement Association)
Image
from article Concrete
Concrete slump test with a slump of 1.5 in., typical for pavement work. (Portland Cement Association)
Image
from article Concrete
Glass concrete tile. (C. Meyer)
Image
from article Steam-generating furnace
Water-cooled furnace-wall constructions. (a) Tangent tube. (b) Welded membrane and tube. (c) Flat stud and tube. (d) Full stud and refractory-covered tube. (e) Tube and tile. (f) Tubes backed by refractory. (After T. Baumeister, ed., Marks' Standard…
Image
from article Castor plant
Seeds of the castor plant (Ricinus communis). These seeds, which are also known as castor beans, are processed to make castor oil. (Credit: Brian Prechtel/Agricultural Research Service, United States Department of Agriculture)
Image
from article Internal combustion engine
The basic mechanics of how an internal combustion engine works, showing only one cylinder. (Credit: Sarah Gerrity, U.S. Energy Department)
Image
from article Impedance matching
L-section impedance matching network.
Image
from article Fluidized-bed combustion
Fluidized-bed steam generator.
Image
from article Fluidized-bed combustion
Flow diagram showing the operation of a multicell fluidized-bed boiler.
Image
from article Fluidized-bed combustion
Flow diagram of 600-MW combined-cycle system.
Image
from article Compressor
Compressor cylinders, (a) water-cooled and (b) air-cooled.
Image
from article Compressor
Cross section of stationary angle-type compressor with first stage vertical and second stage horizontal.
Image
from article Compressor
Operation of sliding-vane rotary compressor.
Image
from article Jawless vertebrate
Interrelationships of jawless and jawed vertebrates, showing the distribution of some major evolutionary steps. (Copyright © McGraw Hill)
Image
from article Electrical impedance
An illustration of a generalized alternating-current circuit.
Image
from article Electrical impedance
Three common ac circuit arrangements. (Credit: Louis Frenzel)
Image
from article Electrical impedance
Standard arrangement of a parallel ac circuit. (Credit: Louis Frenzel)
Image
from article Psocoptera
Valenzuela flavidus, male (family Caeciliusidae): habitus (general appearance). Body length: 2.02 mm (0.08 in.).
Image
from article Psocoptera
Metylophorus novaescotiae, female (family Psocidae): habitus. Body length: 5.24 mm (0.2 in.).
Image
from article Psocoptera
(a–e) Mouthparts of a typical psocid, Echmepteryx hageni (family Lepidopsocidae): a = labrum, b = maxilla (l = lacinia), c = hypopharynx (li = lingual sclerite), d = mandible, e = labium. Scale: 0.1 mm (0.004 in.). (f) Wing venation of a typical…
Image
from article Psocoptera
Liposcelis brunnea, female (family Liposcelididae): habitus of a cleared specimen. Body length: 1.1 mm (0.043 in.).
Image
from article Spacecraft structure
Tropical Rainfall Measuring Mission (TRMM) spacecraft. (a) Computer-aided-design view. (b) Finite-element model (solar arrays not shown), used for structural sizing of the spacecraft (NASA/GSFC).
Image
from article Spacecraft structure
Exploded view of Delta VI M+(4,2) two-stage rocket. (Delta IV Payload Users Guide, United Launch Alliance (ULA), 2007)
Image
from article Spacecraft structure
Typical flight profile trajectory of the Ariane 5. SRB = solid rocket booster. (Ariane 5 User's Manual, 2008)
Image
from article Spacecraft structure
INTELSAT VII in its stowed and deployed configurations. (Loral, LM Astro)
Image
from article Spacecraft structure
Radio Astronomy Explorer spacecraft with antennas extended in comparison to the Empire State Building in New York City.
Image
from article Spacecraft structure
Honeycomb sandwich construction provides strong and stiff but lightweight structures. (Hexcel Corp.)
Image
from article Spacecraft structure
Woven Kevlar fabric is light and strong.
Image
from article Spacecraft structure
Internal telescope of the Hubble Space Telescope, whose structural members are made of graphite-epoxy. (NASA/Lockheed)
Image
from article Spacecraft structure
Comparison of various space reentry and ballistic missile trajectories.
Image
from article Spacecraft structure
Mars Pathfinder entry, descent, and landing. (NASA/Jet Propulsion Laboratory)
Image
from article Spacecraft structure
The space shuttle with cargo bay doors open. (NASA/Johnson Space Center)
Image
from article Spacecraft structure
ATS 7. (a) Structural assemblies. (b) Side view and (c) bottom view of deployed configuration. (d) Side view and (e) section A-A of launch configuration. (f) View of deployed spacecraft. 1 in. = 25 mm; 1 ft = 0.3 m.
Image
from article Spacecraft structure
The International Space Station is an example of a large structure of changing configuration that cannot be completely assembled on Earth. (NASA)
Image
from article Comfort heating
Thermograms of building structures: (a-c) masonry buildings; (d) glass-faced building. Black indicates negligible heat loss; gray, partial loss; and white, excessive loss. (Courtesy of A. P. Pontello)
Image
from article Airplane
Image
from article Airplane
Effect of streamlining. (a) Body without streamlining. (b) Body with streamlining, minimizing the region of separation.
Image
from article Airplane
Geometry of an airplane wing. Wind velocity component perpendicular to the wing span (V cos Λ, where V is the true wind velocity and Λ is the angle of sweepback) produces lift.
Image
from article Airplane
Illustration of the area rule. (a) Half-plan views of airplanes with uncompensated body and areacompensated body. (b) Cross sections of these airplanes. (c) Variation of cross-sectional areas of these airplanes with body station (longitudinal…
Image
from article Airplane
Variation of coefficient of lift with the angle of attack, showing increase up to the stall angle.
Image
from article Airplane
Aerodynamic control of an airplane. (a) Basic controls and control surfaces. (b) Effect of tilting the airplane in the direction of the wing lift L.
Image
from article Ball-and-race-type pulverizer
Coarse raw material is ground by crushing and attrition between balls and races and is then withdrawn from the pulverizer by an airstream.
Image
from article Oil sand
Tar sand deposits in Alberta. 1 mi = 1.6 km.
Image
from article Material resource planning
Lumpy demand in manufacturing for three types of drills. The boxes represent equal time periods.
Image
from article Material resource planning
Flowchart for a model material resource planning system.
Image
from article Material resource planning
Material requirements plan mechanics and lead-time offsetting for skateboards.
Image
from article Detergent
Laundry detergent addition to a washing machine. (Credit: Shutterstock/TanyaRozhnovskaya)
Image
from article Hyperbaric oxygen chamber
Hyperbaric oxygen treatment facility.
Image
from article Construction engineering
Steps in resolving a construction dispute.
Image
from article Electric distribution systems
Overview of the power system from generation to consumer's switch.
Image
from article Electric distribution systems
Typical power distribution feeder.
Image
from article Thermistor
Bridge circuit for measuring radio-frequency power by use of a pair of thermistors.
Image
from article Devonian
Devonian, the fourth period of the Paleozoic Era.
Image
from article Devonian
Biostratigraphic zones based on conodonts (left) plotted to show approximate correspondence to the chronostratigraphic stages and series which compose the Devonian System (right) and relative sea-level changes (center) showing major fluctuations…
Image
from article Devonian
Reconstruction of Middle Devonian continental positions based on distribution of lithologic climatic indicators. Probable ocean currents derived from this paleogeography explain the biogeographic realms. Kolyma and Tarim are microcontinents of the…
Image
from article Air conditioning
Ranges of operative temperature and relative humidity acceptable to at least 80% of sedentary persons in typical summer or winter clothing and doing light activities. In the overlap area, people with summer clothing might feel slightly cool, while…
Image
from article Air conditioning
Schematic of room air conditioner. (After American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc., Guide and Data Book, 1967)
Image
from article Air conditioning
Schematic of central air-handling unit.
Image
from article Petrochemical
Image
from article Petrochemical
Image
from article Petrochemical
Chemicals from methane.
Image
from article Petrochemical
Chemicals from ethylene.
Image
from article Petrochemical
Image
from article Petrochemical
Image
from article Petrochemical
Image
from article Petrochemical
Image
from article Petrochemical
Chemicals from cycloaliphatic compounds and from aromatic compounds.
Image
from article Petrochemical
Image
from article Petrochemical
Chemicals from synthesis gas. (After J. G. Speight, The Chemistry and Technology of Petroleum, 3d ed., p. 852, Marcel Dekker, New York, 1999)
Image
from article Obolellida
Obolella. (a) Shell exterior (after J. Hall and J. M. Clarke, An introduction to the study of the Brachiopoda intended as a handbook for the use of students, Report of the N.Y. State Geologist for 1891, 1894). (b) Dorsal valve interior, and (c)…
Image
from article Caraway
Caraway (Carum carvi) fruits (often called “seeds”). Scale bar = 1 mm. (Photo by Steve Hurst; USDA–NRCS PLANTS Database)
Image
from article Flame
Structure of a premixed laminar flame front.
Image
from article Flame
Structure of a laminar diffusion flame front.
Image
from article Enantiornithes
Protopteryx, the most primitive known enantiornithine bird, collected from the Early Cretaceous of Hebei Province, northern China.
Image
from article Information management
Information concept in a word tag cloud managed in the context of big data. (Credit: Shutterstock/Rafal Olechowski)
Image
from article Videotelephony
Video telephone call using a tablet computer. (Courtesy of Fotolia, https://us.fotolia.com)
Image
from article Dawn mission
An artist's impression of the Dawn spacecraft in orbit around Vesta. (Credit: NASA/JPL)
Image
from article Dawn mission
The interplanetary trajectory of the Dawn spacecraft. (Credit: NASA)
Image
from article Dawn mission
A natural color image of Vesta taken by the Dawn spacecraft. (Credit: NASA / JPL / MPS / DLR / IDA / Björn Jónsson)
Image
from article Dawn mission
A natural color image of Ceres captured by Dawn, showing some bright salty deposits on the dwarf planet's cratered surface. (Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA / Justin Cowart)
Image
from article Dawn mission
Vesta topography shown as color-contoured Mollweide projection. Topography in kilometers (scale bar at bottom) is calculated relative to a reference ellipsoid of 285 × 285 × 229 km (177 × 177 × 142 mi). (Credit: F. Preusker, German Aerospace Center)
Image
from article Dawn mission
Distribution of hydrogen (H) on the Vestan surface, seen by the gamma ray and neutron detector (GRaND) instrument. (Credit: T. Prettyman, Planetary Science Institute)
Image
from article Dawn mission
Distribution of hydrogen (H) on the Cerian surface, seen by the gamma ray and neutron detector (GRaND) instrument. (Credit: NASA/JPL-Caltech/UCLA/ASI/INAF)
Image
from article Mollusca
Higgins eye pearly mussels (Lampsilis higginsii). (Credit: U.S. Fish and Wildlife Service)
Image
from article Mollusca
Snails are assigned to the class Gastropoda in the phylum Mollusca. (Credit: Zuzha/Shutterstock)
Image
from article Mollusca
Generalized model of a stem mollusk (or archetype) in side view. There are three distinct regions in the molluscan body: head-foot, visceral mass, and mantle-shell. Water circulation through the mantle cavity, gills (ctenidia), and pallial complex…
Image
from article Mollusca
Arrangement of the mantle and shell layers in mollusks. The fleshy mantle margin is divided into three lobes, and the outer pallial lobe is largely responsible for secretion of the three layers of the shell. (Credit: W. D. Russell-Hunter)
Image
from article Mollusca
Aspidobranch ctenidium (feather or plume gill) as found in primitive gastropods and other molluscan groups. (a) Stereogram showing the water current from the ventral inhalant to the dorsal exhalant between adjacent gill plates; this current is…
Image
from article Mollusca
Common octopus (Octopus vulgaris). (Credit: Aerial-motion/Shutterstock)
Image
from article Pictorial drawing
Perspective drawing of a residence. (Home Planners Inc.)
Image
from article Pictorial drawing
Isometric drawing; measurements along each axis are made with the same scale.
Image
from article Pictorial drawing
Oblique pictorial drawing.
