It's hard to get an X-ray image of low -
density material like tissue between bones because X-rays just pass right through like sunlight through a window.
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It was fun reading how people formulated how a disk like planet could have a molten middle layer or the fact there would need to be a concave bottom layer of Earth of
higher density material to ensure gravity fits as it does now.
In January 2005, for example, Ohio State University geophysicist Ralph von Frese and his colleagues noticed a concentration of higher - than - average -
density material in the rock about a mile under the surface of the East Antarctic ice sheet.
Then results from the Orbiting Astronomical Observatory 3, nicknamed Copernicus, showed that bubbles and tunnels of hot, low -
density material pervade the interstellar medium.
These significant depths suggest that Ceres» subsurface is no more than 40 percent ice by volume, and the rest may be a mixture of rock and low -
density materials such as salts or chemical compounds called clathrates.
Get lost in the moment: Front and rear head sponges made from a high -
density material reduce friction for complete comfort no matter where you choose to explore.
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Led by Yuehe Lin, professor in the School of Mechanical and Materials Engineering, the researchers used inexpensive metal to make a super
low density material, called an aerogel, to reduce the amount of precious metals required for fuel cell reactions.
«For low -
density materials like plastics, polymers, foams and other encapsulants, this phase signal can be a thousand times bigger than the absorption signal (of conventional X-ray),» said principal investigator Amber Dagel, who studies physics - based microsystems.
«The crust of a neutron star is made of lower -
density material that contains protons, neutrons and electrons,» Conover says.
«You have a dense material mixed in with a low -
density material, and traditional X-rays can't see that low - density material,» Dagel said.
Dagel is principal investigator for the labs» work into using X-ray phase contrast imaging to study low -
density materials.
«So they don't know if the gaps are filled with the low -
density materials or if that's air.»
«Lighting up the study of low -
density materials.»
Sandia National Laboratories studies myriads of low -
density materials, from laminate layers in airplane wings to foams and epoxies that cushion parts.
Dagel had one in her office and, recognizing it's really just low -
density materials, she and her colleagues imaged it to demonstrate their system.
From weather satellites to GPS to high temperature, low -
density materials, space technologies touch our lives every day.
Larger planets evidently contain a larger fraction of low -
density material (H, He, and H2O).
The hood and roof are carbon fiber, the underbody trays are lighter, and the composite body panels now come from a lower -
density material.
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Made of high -
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It is made of waterproof high -
density material that happens to also be non-skid for maximum safety and comfort.