powdered graphite
21steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
22Magnesium — Not to be confused with Manganese. sodium ← magnesium → aluminium Be ↑ Mg ↓ Ca …
23Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
24Smoking pipe (tobacco) — This article is about pipes used for smoking tobacco. For information about the practice of pipe smoking, see Pipe smoking. Parts of a pipe include the (1) bowl, (2) chamber, (3) draught hole, (4) shank, (5) mortise, (6) tenon, (7) stem, (8) bit… …
25explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… …
26Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
27MythBusters (2009 season) — Country of origin Australia United States No. of episodes 23 (includes 3 specials) Broadcast Original channel …
28Osmium — This article is about the chemical element. For other uses, see Osmium (disambiguation). rhenium ← osmium → iridium Ru ↑ Os ↓ Hs …
29Glass beadmaking — The technology for glass beadmaking is among the oldest human arts, dating back 30,000 years (Dubin, 1987). Glass beads have been dated back to at least Roman times. Perhaps the earliest glass like beads were Egyptian faience beads, a form of… …
30Chemistry set — For other uses, see Chemistry set (disambiguation). A 1940s Gilbert chemistry set A chemistry set is an educational toy allowing the user (typically a teenager) to perform simple chemistry experiments. The best known such sets were produced by… …
