If a block of wood has a density of 0.6 grams per cubic centimeter and a volume of 20 cubic centimeters, what is its mass? A. 10 grams B. 12 grams C. 15 grams D. 18 grams 相关知识点: 试题来源: 解析 B。密度等于质量除以体积,所以质量等于密度乘以体积。0.6 grams per cubic centimeter...
Block copolymers can be used to template large arrays of nanopatterns with periodicities equal to the characteristic spacing of the polymer. Here we demonstrate a technique capitalizing on the multilayered arrangement of cylindrical domains to effectively double the pattern density templated by a given ...
The method involves placing connection surfaces of a block by supporting one on another directly or by a layer constituted of filler material, which is placed between supporting surfaces of two blocks. The binder phase material is enriched by migrating of a binder phase by the connection surfaces...
Volumeratioisanimportantindextomeasurethestrengthofconstructionlanduse.Thevalueofthevolumerateistheratioofdimensionless,usuallywiththeplotareaof1,thetotalbuildingareaoftheblockisamultipleoftheplotarea,namelytheformulaforthevolumerateisasfollows: Volumerate=grossfloorareaoftotalbuildingarea Buildingdensity Buildingdensi...
We consider a 2D Lennard-Jones fluid above the liquid-gas transition. By extending methods developed for lattice models, we divide the simulation cell in subsystems or blocks and compute the distribution function of the order parameter, the density, for different block sizes. In this way we can...
Determinants of bone density among athletes engaged in weight bear- ing and non-weight bearing activity. J Appl Physiol 1989;67:1100-5... JE Block,AL Friedlander,GA Brooks,... - 《Journal of Applied Physiology》 被引量: 158发表: 1989年 Type of Physical Activity, Muscle Strength, and Pube...
Subway, underground environment, and large buildings could create so-called “street canyons” which block the communications with satellites [65]. To address the GPS error, we processed the data to maximize reliability by eliminating isolated points and duplicated timestamps. Moreover, the GPS ...
Scaling of entanglement entropy in a quantum phase transition in the transverse Ising model induced by a quench It is known that at the critical point of a zero-temperature quantum phase transition in a one-dimensional spin system the entanglement entropy of a block ... P Majumdar,P Bandyopadhy...
Diblock copolymers of polystyrene and poly(oxyethylene) were adsorbed at the toluene/water interface. The short water soluble poly(ethylene oxide) block anchors the polymer at the interface, whereas the long nonadsorbing Polystyrene block remains in toluene in good solvent conditions. The adsorption la...
In this paper, we describe a numerical method for the calculation of collective diffusion relaxation mechanisms in quenched block copolymer melts. The method entails the repeated calculation of two opposing fields—an external potential fieldU, conjugate to the density field ρ, and an energetic inter...