shear of magnetic field
71Accretion disc — An accretion disc (or accretion disk) is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a central body. The central body is typically either a young star, a protostar, a white dwarf, a neutron star,… …
72Joint European Torus — JET, the Joint European Torus, is the largest nuclear fusion experimental reactor yet built.The reactor is situated on an old Navy airfield near Culham, Oxfordshire, in the UK: the construction of the buildings which house the project was… …
73Jürgen Ehlers — Infobox Scientist box width = 300px name = Jürgen Ehlers caption = At the award ceremony for the Charles University Medal in Potsdam, September 2007 imagesize = 138 birth date = birth date|1929|11|29|mf=y birth place = Hamburg residence = Germany …
74Torsion spring — A mousetrap powered by a helical torsion spring A torsion spring is a spring that works by torsion or twisting; that is, a flexible elastic object that stores mechanical energy when it is twisted. The amount of force (actually torque) it exerts… …
75Rigidity — Generally, rigidity refers to inflexibility or resistance to change. It has a number of specific meanings depending on the field of application.In medicine (neurology) rigidity describes an increase in muscle tone, leading to a resistance to… …
76Inductively Coupled Plasma Emission Spectrometry — Inductively Coupled Plasma Emission SpectrometryA test method of quantitative identification of the elements, Aluminium, Silicon, Sodium, Vanadium, Nickel, Iron, Calcium, Zinc and Phosphorus in residual fuel oils.A weighted test sample is… …
77Rail inspection — is the practice of examining rail tracks for flaws that could lead to catastrophic failures. According to the United States Federal Railroad Administration Office of Safety Analysis, [ [http://safetydata.fra.dot.gov/officeofsafety/ Federal… …
78Bolted joint — Bolted joints are one of the most common elements in construction and machine design. They consist of cap screws or studs that capture and join other parts, and are secured with the mating of screw threads.There are two main types of bolted joint …
79Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology …
80Slinky — A Slinky is a coil shaped toy invented by mechanical engineer Richard James in Philadelphia, Pennsylvania. [http://web.mit.edu/Invent/iow/slinky.html Inventor of the Week: Archive ] ] It could go down stairs by walking end over end . [ Reader s… …
