metals expand when heated
91Helium — otherusesHelium (He) is a colorless, odorless, tasteless, non toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the… …
92Disc brake — Close up of a disc brake on a car On automobiles, disc brakes are often located with …
93History of the Song Dynasty — The Song Dynasty (Chinese: ; pinyin: Sòng cháo; 960 1279) of China was a ruling dynasty that controlled China proper and southern China from the middle of the 10th century into the last quarter of the 13th century. The Song Dynasty is considered… …
94Collapse of the World Trade Center — Coordinates: 40°42′41.12″N 74°00′44.00″W / …
95Dental braces — (also known as orthodontic braces, or simply braces) are devices used in the orthodontic industry that help align and straighten teeth and help to position them with regard to a person’s bite, while also working to improve dental health. They are …
96antimony — antimonial, adj., n. /an teuh moh nee/, n. Chem. a brittle, lustrous, white metallic element occurring in nature free or combined, used chiefly in alloys and in compounds in medicine. Symbol: Sb; at. no.: 51; at. wt.: 121.75. [1375 1425; late ME… …
97Yeast — of the species Saccharomyces cerevisiae Scientific classification Domain …
98IK Pegasi — Starbox begin name=IK Pegasi Starbox image caption=Location of IK Pegasi. Starbox observe epoch=J2000 ra=RA|21|26|26.6624cite web title=SIMBAD Query Result: HD 204188 Spectroscopic binary publisher=Centre de Données astronomiques de Strasbourg… …
99Lighter than air — Some gases are buoyant in air because they have densities lower than that of air (about 1.2 kg/m3, 1.2 g/l). Lighter than air gases are used to fill craft called aerostats, which include free balloons, moored balloons, and airships, to make the… …
100History of metallurgy in the Indian subcontinent — began during the 2nd millennium BCE and continued well into the British Raj. [See Tewari 2003 and Arnold, pages 100 101 ] The Indian cultural and commercial contacts with the Near East and the Greco Roman world enabled an exchange of metallurgic… …
