Why do the following two lines of code compile but cause a runtime error? Number[] numberArray = new Integer[2]; numberArray[0] = new Double(1.5);

Find and graph the magnitude and phase of the even and odd parts of this “discrete-k” function. $\mathrm{G}[k]=\frac{10}{1-j 4 k}$

Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A person has a name, address, phone number, and email address. A student has a class status (freshman, sophomore, junior, or senior). Define the status as a constant. An employee has an office, salary, and date hired. Use the MyDate class defined in Programming Exercise 10.14 to create an object for date hired. A faculty member has office hours and a rank. A staff member has a title. Override the toString method in each class to display the class name and the person’s name. Draw the UML diagram for the classes and implement them. Write a test program that creates a Person, Student, Employee, Faculty, and Staff, and invokes their toString() methods.

Suppose m and r are integers. Write a Java expression for $\mathrm{mr}^{2}$ to obtain a floating point result.

What will happen when you attempt to run the following code? import java.io.*; public class Test { public static void main(String[] args) throws IOException { try ( ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream("object.dat")); ) { output.writeObject(new A()); } } } class A implements Serializable { B b = new B(); } class B { }

You used selection sort to sort an array. The selection-sort method repeatedly finds the smallest number in the current array and swaps it with the first. Rewrite this program by finding the largest number and swapping it with the last. Write a test program that reads in ten double numbers, invokes the method, and displays the sorted numbers.

True or false? All the binary operators except = are left associative.

An airline, believing that 5% of passengers fail to show up for flights, overbooks (sells more tickets than there are seats). Suppose a plane will hold 265 passengers, and the airline sells 275 tickets. What's the probability the airline will not have enough seats, so someone gets bumped?

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Sun-Yi estimated 270 + 146 and got 320. Is her estimate reasonable? Explain.

Solve the following inequalities. (a) $\frac{x+3}{2}>5$ (b) $\frac{x-4}{6} \leq 3$ (c) $\frac{2 x+3}{4}<-5$ (d) $\frac{3 x+2}{5} \leqslant 4$ (e) $\frac{4 x-3}{2} \geq-7$ (f) $\frac{5 x+1}{3}>-3$ (g) $\frac{3 x-2}{8}<1$ (h) $\frac{4 x-2}{3} \geq-6$

A uniform plane wave has electric field $\mathbf{E}_{s}=\left(E_{y 0} \mathbf{a}_{y}-E_{z 0} \mathbf{a}_{z}\right) e^{-\alpha x} e^{-j \beta x}$ V/m. The intrinsic impedance of the medium is given as $\eta=|\eta| e^{j \phi},$ where $\phi$ is a constant phase. (a) Describe the wave polarization and state the direction of propagation. (b) Find $\mathbf{H}_{s}.$ (c) Find $\mathcal{E}(x, t) \text { and } \mathcal{H}(x, t) .(d) \text { Find }<\mathbf{S}>\text { in } \mathrm{W} / \mathrm{m}^{2}.$ (e) Find the time-average power in watts that is intercepted by an antenna of rectangular cross-section, having width w and height h, suspended parallel to the yz plane, and at a distance d from the wave source.

What common factor triggered the "hot" wars in Asia during the Cold War?

According to "When I Consider How My Light Is Spent," at what point in Milton's life does blindness begin to affect him and his work?