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Abrasion (mechanical) Surface roughness resulting from abrasion wear on a spindle. Abrasion is the process of scuffing, scratching, wearing down, marring, or rubbing away. It can be intentionally imposed in a controlled process using an abrasive. Abrasion can be an undesirable effect of exposure to normal use or exposure to the elements.
Sclerometer. The sclerometer, also known as the Turner-sclerometer (from Ancient Greek: σκληρός meaning "hard"), is an instrument used by metallurgists, material scientists and mineralogists to measure the scratch hardness of materials. It was invented in 1896 by Thomas Turner (1861–1951), the first Professor of metallurgy in Britain ...
Scratch is a high-level, block-based visual programming language and website aimed primarily at children as an educational tool, with a target audience of ages 8 to 16. [ 8] Users on the site can create projects on the website using a block-like interface. Scratch was conceived and designed through collaborative National Science Foundation ...
A Formula Student car performing a skidpad test. (2009) A skidpad or skidpan [1] is a circular area of flat pavement used for various tests of a car's handling. The most common skidpad use is testing lateral acceleration, measured in meters per second squared (m/s 2) or the scaled unit g-force. This usage has similarities to that of using a ...
Aquifer testing is a common tool that hydrogeologists use to characterize a system of aquifers, aquitards and flow system boundaries. A slug test is a variation on the typical aquifer test where an instantaneous change (increase or decrease) is made, and the effects are observed in the same well. This is often used in geotechnical engineering ...
The newly expanded program comes in three tiers: The cheapest costs $7.99 per month, allowing for 40 games a visit with a 20% discount on food and drinks; the next is $11.99 for 100 games and a 30 ...
Number of tests. 6. Test type. underground. Max. yield. ~140 kt ( U.S. intelligence) [ 1 ] 160 kt (Revised estimates from Japanese Government) [ 2 ] 250 kt ( 38 North and revised NORSAR estimate) [ 3 ][ 4 ] North Korea has conducted six nuclear tests, in 2006, 2009, 2013, twice in 2016, and in 2017.
Scratch and sniff. Scratch and sniff technology is the application of a fragrant coating to items such as stickers or paperboard, so that when the coating is scratched it releases an odor that is normally related to the image displayed under the coating. The technology has been used on a variety of surfaces from stickers to compact discs.