Answer:
The last option i.e "A class is an instance of its object" is the correct answer of this question.
Explanation:
A class is a collection of variable and method . The class is the blueprint of the object that means class is physical space entity and object is a runtime space entity.It is the the reusability feature of the programming component.
Following are the syntax to declare any class.
Class classname
<u>For Example</u>: class test1
With the help of class we can achieve the inheritance, encapsulation and abstraction etc.
All the other options except the last one are correct option. Because option(1), option(2) and option(3) follow the property of class and object . that's why last option is False.
Answer:
i not know mainframe computer there is many use of computer
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.
Ash is the answer. Hope this helps
