The energy per unit length of a dislocation is ½ Gb2. Dislocations dilate a close packed crystal structure very slightly, because at their cores the atoms are not close packed: the dilatation is ¼b2 per unit length of dislocation. It is found that the density of a bar of copper changes from 8.9323 Mg m–3 to 8.9321 Mg m–3 when it is very heavily deformed. Calculate:
a. the dislocation density introduced into the copper by the deformation.
b. the energy associated with that density. Compare these results with the latent heat of melting of copper (1833 MJ m–3) (b for copper is 0.256 nm; G is 3/8 E).
Upload US crime data and compare the burglary counts for the states of Hawaii, California, Arizona and Nevada. Your job is to identify which of the three states is most c...Apr 25 2020
A statistics practitioner would like to draw a histogram of 62 observations that range from 5.2 to 6.1. a. What is an appropriate number of class intervals? b. Define th...Jun 22 2020
Suppose that before trade opens up, Brazil is at a point on its production possibility curve (PPC) where it produces 20 apples and 20 cars. Once trade opens up, the price...Apr 13 2020
Is the neoclassical, free-market theory necessarily incompatible with dependence theory? How might these two approaches work together >Apr 10 2020
A technological breakthrough raises a country s total factor productivity A by 10%. Show how this change affects the graphs of both the production function relating outpu...May 07 2020
The positive relationship between the short-run aggregate supply function and the ________ suggests that, in the short run, firms produce more output as the price levels ...Dec 07 2019
you modified the RentalDemo program for Sammy's Seashore Supplies to accept and display data for an array of three Rental objects. Now, modify the program to use an array...Apr 18 2020
Marketing Plan Throughout this course you will compile a comprehensive marketing plan using one of the product scenarios below (note you will use the same scenario thro...Nov 05 2017
The word count should be around 2,500 words.Assignment:"Select a retail format of your choice. Explain its business model and identify its direct competitors, its target ...Jul 27 2020
Assume you sold short 100 shares of common stock at $70 per share. The initial margin is 50%. What would be the maintenance margin if a margin call is made at a stock pri...Apr 15 2020