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Magnetic Particle Inspection

Magnetic particle inspection is a nondestructive testing method used for defect detection. MPI is a fast and relatively easy to apply and part surface preparation is not as critical as it is for some other NDT methods. These characteristics make MPI one of the most widely utilized nondestructive testing methods .. More ... >>

Physics Glossary

Absolute zero is the theoretical temperature at which atoms stop vibrating. All atoms have vibrational energy, even in solids, but if we cool them, they vibrate less. In practice, absolute zero would seem to be impossible to reach - but we can get to within millionths of a degree of it.. More ... >>

Electromagnetic Spectrum

You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels .. More ... >>

Light Waves

Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light .. More ... >>

About Green Buildings

As the green building industry matures, many, if not all, manufacturers have added environmental claims to their marketing messages. In doing so, some companies have inadvertently and even purposely overstated or failed to qualify their claims. When this happens .. More ... >>

Specific Gravity

There are a lot of numbers on a material property data sheet. A truly complete property sheet may have more than 60 entries for a broad range of mechanical, thermal, and electrical properties while others may list values for only four or five. But even the most cursory treatment will include .. More ... >>

List of Materials - Densities

Aluminum 2.702, Brass 8.4-8.7, Bronze 7.4-8.9, Cobalt 8.9, Copper 8.93,
Gold - Pure 19.32, Gold - Alloys 15.3-19.3 .. More ... >>

polymer feedstock made from biomass

Type "biomass" into your favorite Internet search engine, and you'll uncover sites that focus on methods for converting plant matter into fuels. The idea of motorists pumping their tanks full of fuel made from forestry .. More ... >>

How Tires are Made?

The wheel is one of the greatest inventions in human history due to its wide range of applications. These applications include any type of transportation; whether it is people, materials, or equipment being moved. Charles Goodyear invented the .. More ... >>

What is the Best Bridge Type??

The engineer has many options to choose from when selecting the type of bridge to use. Which bridge type is eventually selected depends on many factors including the length to be spanned, the loads to be carried, and the cost to make and erect the bridge, just to name just a few .. More ... >>

Sourcing Stories

Steel wire and wire products have been at the forefront of global capitalism since their inception. Technical improvements in the United States during the 1800's made it possible to draw long strands of strong .. More ... >>

World's Largest Structures

Meet the United States Navy's newest monster of the sea. Powered by two nuclear reactors, the U.S.S. Ronald Reagan can operate for 20 years without .. More ... >>

Middle East Oil Revenues and Where do they go

The oil booms of the late 1970s and early '80s left oil producing Middle Eastern countries awash in money. Billions of petrodollars were spent on unsustainable domestic projects .. More ... >>

Middle East Largest Dams

List of Middle East dams ranking among world's largest .. More ... >>

Middle East Tallest Buildings

List of vital statistics for the middle tallest buildings ranking  in the world,
as reported by skyscraper databases and Web sites .. More ... >>

Longest Railroad Tunnels

Longest Railroad Tunnels in the World .. More ... >>

World Biggest Cities

Marathi Mumbai (the former Bombay), capital of Maharashtra state, in India, port to the Arabian Sea and one of the most densely populated cities .. More ... >>

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