MATERIALS SCIENCE & ENGINEERING:AN INTRO
10th Edition
ISBN: 9798203933584
Author: Callister
Publisher: ZYBOOKS
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7. See the code below and solve the following.
public class Test {
public static void main(String[] args) {
int result = 0;
}
result = fn(2,3);
System.out.println("The result is:
+ result);
// fn(x, 1) = x
// fn(x, y)
=
fn(x, y-1) + 2, when y>1
public static int fn(int x, int y) {
if (x <= 1)
return x;
else
return fn(x, y-1) + 2;
}
}
7-1. This program has a bug that leads to infinite recursion. Modify fn(int x, int y) method to fix
the problem. (2 point)
7-2. Manually trace the recursive call, fn(2,3) and show the output (step by step). (2 point)
7-3. Can you identify the Base Case in recursive method fn(int x, int y)? (1 point)
Draw three diagrams or curves according to the table above that show the relationship between the armature current and the voltage, the armature current and the speed, and the armature current and the shunt current. This is what I am sure of. Real paper
6. See the code below and solve the following.
import java.io.*;
public class DataStream {
}
public static void main(String[] args)
}
DataOutputStream output = new DataOutputStream(new FileOutputStream("temp.dat"));
output.writeUTF("Book1");
output.writeInt(85);
output.writeUTF("Book2");
output.writeInt(125);
output.writeUTF("Book3");
output.writeInt(70);
output.close();
// ToDo: Read all data from temp.dat and print the data to the standard output (monitor)
6-1. This program has a compile error, and the message is “Unhandled exception type
FileNotFoundException". How do you fix this error? (1 point)
6-2. Is FileNotFoundException a checked exception or an unchecked exception? (1 point)
6-3. What is the difference between checked exception and unchecked exception? (1 point)
6-4. Please complete the above program by reading all data from temp.dat and print the data
to the standard output (monitor) by using System.out.print, System.out.println or
System.out.printf method. (2 points)
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- Feed mixture weighing 200 kg of unknown composition containing water, acetic acid, isopropyl ether is contacted in a single stage with 280kg mixture containing 40wt% acetic acid. 10wt% water and 50wt% isopropyl ether. The resulting raffinate layer weight 320 kg and containing 29.5wt% acetic acid, 66.5 wt% water and 4wt% isopropyl ether. Determine the composition of the original feed mixture and the extract layer Water layer Isopropyl ether layer acetic acid water Isopropyl ether acetic acid water Isopropyl ether 0 98.8 1.2 0 0.6 99.4 0.69 98.1 1.2 0.18 0.5 99.3 1.41 97.1 1.5 0.37 0.7 98.9 2.89 95.5 1.6 0.79 0.8 98.4 6.42 91.7 1.9 1.93 1 97.1 13.3 84.4 2.3 4.82 1.9 93.3 25.5 71.1 3.4 11.4 3.9 84.7 36.7 58.9 4.4 21.6 6.9 71.5 44.3 5.1 10.6 31.1 10.8 58.5 46.4 37.1 16.5 36.2 15.1 48.7arrow_forwardOne thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous, countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the following equilibrium data, determine with an equilateral-triangle diagram: a- the minimum flow rate of solvent; b- the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each streamleaving each stage. c- Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water impurities) acetone water 1,1,2-trichloroethane Raffinate. Weight Extract. Weight 0.6 0.13 0.27 Fraction Acetone Fraction Acetone 0.5 0.04 0.46 0.44 0.56 0.4 0.03 0.57 0.29 0.40 0.3 0.02 0.68 0.12 0.18 0.2 0.015 0.785 0.0 0.0 0.1 0.01 0.89 0.55 0.35 0.1 0.5 0.43 0.07 0.4 0.57 0.03 0.3 0.68 0.02 0.2 0.79 0.01 0.1 0.895 0.005arrow_forward2500 kg/hr of (20-80) nicotine water solution is to be extracted with benzene containing 0.5% nicotine in the 1st and 2ed stages while the 3rd stage is free of nicotine. Cross- current operation is used with different amounts of solvent for each stages 2000kg/hr in the 1st stage, 2300 kg/hr in the 2nd stage, 2600 kg/hr in the 3rd, determine: - a- The final raffinate concentration and % extraction. b- b- The minimum amount of solvent required for counter-current operation if the minimum concentration will be reduced to 5% in the outlet raffinate. Equilibrium data Wt % Nicotine in water Wt % Nicotine in benzene 0 4 16 25 0 4 21 30arrow_forward
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