METALSThe aim of the current study is to examine how preschool children overcome their difficulties regarding thermal expansion and contraction and construct in their minds a precursor model; that is, an entity compatible with school knowledge. Having investigated these difficulties ...
The socket in the shake allows the metal to Expand and Contract in all directions around the fastener without pulling on the fastener, which over time would otherwise work it loose. All parts of the Hy-Grade system are designed to allow for Expansion and Contraction as well to prevent ...
An act, process, or instance of expanding. The expansion of metals and plastics in response to heat is well understood. Extension The property of an object by which it occupies space. Expansion The fractional change in unit length per unit length per unit temperature change. Look up the expan...
6. the development at length of an expression indicated in a contracted form, as a2 + 2ab + b2 for the expression (a + b)2. 7. an increase in economic and industrial activity (opposed to contraction). [1605–15; < Late Latin] ex•pan′sion•al, adj. Random House Kernerman...
Metal Expansion Apparatus, Bar and Gauge Apparatus Demonstration tool for Thermal Expansion and Cooling Contraction of Metals No reviews yet Ningbo Hema Scientific Instrument Co., Ltd.6 yrsCN Key attributes Other attributes Place of Origin Zhejiang, China...
metal-organic frameworks expansion and contraction flexibility coordination chemistry dynamic covalent chemistry post-synthetic methods interpenetration stability and lability Introduction Design and synthesis of highly porous metal-organic frameworks (MOFs) with large pore sizes have attracted significant interest ...
In the present study, three-dimensional numerical simulations of turbulent flow in shell-and-tube heat exchangers (STHEs) are performed, in which a novel design of successive expansion and contraction of tubes (SECTs) is used. In these STHEs, two types of the SECT are used: (1) the SECT...
contraction n. 1.订约 2.(分娩时)子宫收缩 3.收缩,缩短 4.缩减 5.缩略词 financial a. 财政的,金融的 n.[financials] 1.金融统计数据 2.金融公司的股票 Expansion 拔展,展开在一个交网络(或是网络中的一部分)中,轮出线路比输入线路多时称为扩展。 expansion n. 1.扩大,扩充,扩展,扩张,发展 2....
(General Physics) the amount of expansion (or contraction) per unit length of a material resulting from one degree change in temperature. Also called:expansivity Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 20...
2.Discussion on new-type colligation demonstration meter on thermal expansion and contraction of solid and exploring of physical principle新型固体热胀冷缩综合演示仪与相关物理原理的讨论 3.A gas is cooled by expansion and heated by compression.气体膨胀时冷却,压缩时变热。 4.All metals expand with heat...