sheet or foil of thin metal
41Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
42Ultrasonic welding — is an industrial whereby high frequency ultrasonic acoustic vibrations are locally applied to workpieces being held together under pressure to create a solid state weld. It is commonly used for plastics, and especially for joining dissimilar… …
43X-ray — [ 22 December 1895 and presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896. The dark oval on the third finger is a shadow produced by her ring. [cite book last = Kevles first =Bettyann Holtzmann …
44Blasting cap — A blasting cap is a small explosive device generally used to detonate a larger, more powerful explosive such as dynamite.Blasting caps come in a variety of types, some of which are: non electric caps, electric caps and fuse caps. They are used in …
45art, African — ▪ visual arts Introduction the visual arts of native Africa, particularly sub Saharan Africa, including such media as sculpture, painting, pottery, rock art, textiles, masks, personal decoration, and jewelry. For more general… …
46food preservation — Any method by which food is protected against spoilage by oxidation, bacteria, molds, and microorganisms. Traditional methods include dehydration, smoking, salting, controlled fermentation (including pickling), and candying; certain spices have… …
47Mimeograph — Illustration of a typical mimeograph machine Ja …
48List of concepts in Artemis Fowl — This is a list of fictional concepts in Artemis Fowl, a novel series by Eoin Colfer. Contents 1 Fairy concepts 1.1 Bio bomb 1.2 Book of the People 1.3 Buzz baton …
49Totenpass — A Totenpass in the form of an inscribed metal leaf was sometimes rolled up and inserted into a necklace capsule, as shown in this 2nd century funerary portrait from Egypt …
50Introduction to quantum mechanics — This article is an accessible, non technical introduction to the subject. For the main encyclopedia article, see Quantum mechanics. Quantum mechanics …
