potential graphene applications include lightweight, thin, and flexible electric/photonics circuits, solar cells, and various medical, chemical and industrial processes enhanced or enabled by the use of new graphene materials.. in 2008, graphene produced by exfoliation was one of the most expensive materials on earth, with a sample the area of a cross section of a human hair costing more than .
for the applications where a micrometer-fine pulverized coal is not necessary, the static classifier, which consists of a cone equipped with adjustable vanes, is an option at a lower cost since it contains no moving parts. with adequate mill grinding capacity, a vertical mill equipped with a static classifier is capable of producing a coal .
nichrome nicr, nickel-chrome, chrome-nickel, etc. is any of various alloys of nickel, chromium, and often iron and possibly other elements .the most common usage is as resistance wire, as heating elements in things like toasters and space heaters, although they are also used in some dental restorations fillings and in a few other applications.
the royal porcelain factory in berlin german: königliche porzellan-manufaktur berlin, abbreviated as kpm , also known as the royal porcelain manufactory berlin and whose products are generally called berlin porcelain, was founded in 1763 by king frederick ii of prussia known as frederick the great . its actual origins, however, lie in three private enterprises which, under crown patronage .
nuclear weapon designs are physical, chemical, and engineering arrangements that cause the physics package of a nuclear weapon to detonate. there are three existing basic design types: pure fission weapons, the simplest and least technically demanding, were the first nuclear weapons built and have so far been the only type ever used in an act of war over wartime japan .
a thumb compass is a type of compass commonly used in orienteering, a sport in which map reading and terrain association are paramount. consequently, most thumb compasses have minimal or no degree markings at all, and are normally used only to orient the map to magnetic north. an oversized rectangular needle or north indicator aids visibility.
of these, proton therapy is by far the most common, though still quite rare compared to other forms of external beam radiotherapy, since it requires large and expensive equipment. the gantry the part that rotates around the patient is a multi-story structure, and a proton therapy system can cost as of 2009 up to us$150 million.