Suchergebnisse
Suchergebnisse:
Vor 2 Tagen · As a function of temperature in kelvins, the viscosity can be estimated using the semi-empirical Vogel-Fulcher-Tammann equation: = where A = 0.02939 mPa·s, B = 507.88 K, and C = 149.3 K. Experimentally determined values of the viscosity are also given in the table below. The values at 20 °C are a useful reference: there, the dynamic ...
Vor 5 Tagen · Graphene ( / ˈɡræfiːn / [1]) is an allotrope of carbon consisting of a single layer of atoms arranged in a hexagonal lattice [2] [3] nanostructure. [4] The name is derived from "graphite" and the suffix -ene, reflecting the fact that the graphite allotrope of carbon contains numerous double bonds. Each atom in a graphene sheet is connected ...
Vor 5 Tagen · The Poisson distribution is a good approximation of the binomial distribution if n is at least 20 and p is smaller than or equal to 0.05, and an excellent approximation if n ≥ 100 and n p ≤ 10. [31] Letting and be the respective cumulative density functions of the binomial and Poisson distributions, one has:
Vor einem Tag · The purpose of this paper is twofold: on the one hand, it reviews semi-empirical formulas for computing the friction coefficient in lubricated contact under various operating conditions; on the other hand, it implements and compares contact force models coupled with the metal-metal lubricated empirical friction formulas in a multibody dynamics simulation environment. Implementing empirical ...
Vor 5 Tagen · In this work, the experimental EXFOR data collected across the neutron-induced energy between 14 and15 MeV were used to produce empirical formulas to calculate the (n, $$\\alpha$$ α ) reaction cross-section. By including the asymmetry parameter, mass number and average binding energy into the main empirical formula, we achieved empirical systematics for 119 nuclei that were categorized into ...
Vor einem Tag · Large-Scale Material Extrusion (LS-MEX) is increasingly being used in small-scale production and prototyping due to its ability to create components in new temporal and spatial dimensions. However, the use of this manufacturing process poses microscopic and macroscopic challenges not encountered in previous small-scale production systems. These challenges arise primarily from the prolonged ...
Vor 4 Tagen · determine the empirical formula of a compound from its molecular formula or the number of atoms present, use a compound’s empirical formula and molecular mass to determine its molecular formula, use experimental results to determine the molecular or empirical formula of a compound.
