--%>
Assignment Help - homework help

Introduction to Programming for Engineering

The purpose of this assignment is to get you started with C++ programming. You'll develop simple programs (with input and output) to solve simple mathematical and engineering problems.

1. Write a program to compute the area A of any ellipse with semiaxes a and b. Prompt the user to enter the lengths a and b. Set the precision of the area to two decimal points. (The area of an ellipse is computed using this formula: Area= π a∗ b.)

Sample Output:

Enter the length of the semiaxes: 12 15

The area of an ellipse with semiaxes 12 and 15 is 565.49

2. Consider the following circuit.

722_c3.png

Ohm's Law describes the relationship between voltage (V), current (I) and resistance (R). To calculate total resistance for multiple resistances in series, the following series resistance formula is applied:

RTotal = R1 +R2 +. . .+Rn

where R is each individual resistor. To calculate the total parallel resistance, the following parallel resistance formula is applied:

RTotal = 1/ (1/R1)+(1/R2)+. . .+(1/Rn)

where R is each individual resistor. Write a program that reads the resistances of the four resistors and computes the total resistance, using Ohm's law. Set the precision of the final total resistance to two decimal points. HINT: To measure the total resistance of this circuit, you need to calculate the total parallel resistance of R2, R3, and R4 first. Then, calculate the total series resistance of R1 and the calculated total parallel resistance.

Sample Output:

Enter the value of R1: 10

Enter the value of R2: 20

Enter the value of R3: 20

Enter the value of R4: 20

The total resistance for this circuit is: 16.67 ohms.

3. The circuit shown below illustrates some important aspects of the connection between a power company and one of its customers. The customer is represented by three parameters, Vt, P, and pf. Vt

is the voltage accessed by plugging into a wall outlet. Customers depend on having a dependable value of Vt in order for their appliances to work properly. Accordingly, the power company regulates the value of Vt carefully. P describes the amount of power used by the customer and is the primary factor in determining the customer's electric bill. The power factor, pf, is less familiar. (The power factor is calculated as the cosine of an angle so that its value will always be between zero and one.) In this problem you will be asked to write a C++ program to investigate the significance of the power factor.

411_c1.png

In the figure, the power lines are represented, somewhat simplistically, as resistances in Ohms. The power company is represented as an AC voltage source. The source voltage, Vs, required to provide the customer with power P at voltage Vt can be determined using the formula

1669_c2.png

(Vs has units of Vrms.) This formula indicates that the value of Vs depends on the value of pf. Write a C++ program that prompts the user for a power factor value and then prints a message giving the corresponding value of Vs, using the values for P, R, and Vt shown in the figure above. Set the precision of Vs to two decimal points.

Sample Output:

Enter the power factor, pf: 0.75

P = 260 W, R = 10 Ohms, and Vt = 120 Vrms

Vs = 167.75 Vrms

   Related Questions in Programming Languages

  • Q : What is Behavior Behavior : It is the

    Behavior: It is the methods of a class which implement its behavior. A particular object's behavior is a mixture of the method definitions of its class and the present state of the object.

    		•
  • Q : Define Unicode Unicode : It is a 16-bit

    Unicode: It is a 16-bit character set designed to make it simpler to exchange and exhibit information which makes use of a broad range of dissimilar languages and symbols.

    		•
  • Q : Define Arithmetic operator Arithmetic

    Arithmetic operator: The Operators, like +, -, *, / and %, which generate a numerical outcome, as a part of an arithmetic expression.

    		•
  • Q : Explain Object reference Object

    Object reference: It is a reference to an object. Languages other than Java employ terms like pointer or address or. It is significant to keep the difference clear between an object and its reference. The variable like argo

    Q : For creating a thread explain the limit

    For creating a thread explain the limit on per process.

    		•
  • Q : What is Common Gateway Interface Common

    Common Gateway Interface: The Common Gateway Interface (abbreviated as CGI) is a standard which permits Web clients to interact with programs on Web server. The CGI script is on the server and is able to process arguments or input from a client, and r

    		•
  • Q : What are collections and generics What

    What are collections and generics?

    		•
  • Q : Explain Message passing Message passing

    Message passing: We characterize the object interactions as message passing. The client object sends a message to a server object by invoking a technique from the server's class. Arguments might be passed with the message, and a outcome is returned by

    		•
  • Q : Define the term Field Define the term

    Define the term Field: Variables stated within a class or interface, exterior of the methods. The fields are members of a class.

    		•
  • Q : Define the term Instance Define the

    Define the term Instance: It is a synonym for object. The objects of a class are instantiated whenever a class constructor is invoked through the new operator.

    		•