Answer:
a) D = 4.88 * 10^(-14) m^2 / s
b) <em>t </em>= 1.1 hr
Solution:
a) Magnesium in Aluminum diffusion:
D = Do * exp(-Qd / RT)
= (1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15)
= 4.88 * 10^(-14) m^2 / s
D = 4.88 * 10^(-14) m^2 / s
b) The composition remains same at say the distance Xo:
(Cx - Co) / (Cs - Co) = Constant
Xo^2 / D_{550} * <em>t </em>= Xo^2 / D_{450} * 15
D_{550} * <em>t </em>= D_{450} * 15
(1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15) * <em>t</em>
(4.88 * 10^(-14) m^2 / s) * 15
by, solving for <em>t </em>we get:
<em>t </em>= 1.1 hr
So, the time required is 1.1 hr.
Answer:
a. device administration
Explanation:
Device Administration is a powerful API feature on the Android framework which was first introduced in Android version 2.2. It offers some features at the system level that enables some other key features such as the storage on a device, remotely wiping or enforcing password policies.
It is also utilized in uninstalling your application from the device or to capture a picture by the use of camera when screen is lock.
Answer:
real time analytics technology
Explanation:
Online stores usually use real-time analytics technology to present customized content. Explanation: Real-time analytics is gaining popularity nowadays. It is basically the procedure of measuring and preparing the data as it enters the database
Cloud computing is making hardware, software and data available on demand via a network.
The cloud stands for a network that, with all the computers connected to it, forms a kind of 'cloud of computers', where the end user does not know how many or which computer the software runs on or where those computers stand exactly.
In this way, the user no longer needs to be the owner of the hardware and software used and is therefore not responsible for maintenance. The details of the information technology infrastructure are hidden from view and the user has his own virtual infrastructure, scalable in size and possibilities.
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