ABSTRACT
While there is a growing interest in infusing engineering into elementary classrooms, very little is known about how well positioned elementary teachers are to teach engineering. This study examined elementary teachers’ perceptions of and familiarity with design, engineering, and technology (DET). Data was collected from 192 elementary teachers using the “DET Teacher Survey”. While these elementary teachers thought teaching DET was important, they were relatively unfamiliar with DET. Years of teaching experience did not affect teachers’ familiarity with teaching DET and their perceptions of how important DET was. Moderately experienced teachers showed stereotypical views of engineering. Furthermore, teachers’ motivations to teach DET differed based on their ethnic backgrounds. The results suggest a need to improve elementary teachers’ familiarity with design, engineering, and technology. Professional development activities should be guided by research on teacher knowledge, and establish an alignment between motivations of teachers and expectations of their schools to ensure administrative support.

1. Based on the journal paper above, write the components of the abstract in the table provided below. (45 points)

   Problem statement Purpose of the study:

   Participants/subjects:

   Data collection/Research method:
   Findings/main results:

1# What is the conservation of momentum? Under what conditions is it true?

During the upcoming lab you will work as a class to test predictions as to when momentum is and is not conserved when you collide two gliders. You will have available gliders with different masses and different things you can mount on the end of gliders to interact (including springs, Velcro, magnets). Please identify at least a four different scenarios you could test that span a range of different conditions, including at least one in which you expect total momentum to be conserved and at least one in which you DO NOT expect total momentum to be conserved

2# in the upcoming lab, it will be useful to program Lab Assistant to make graphs of the momentum of each glider and the entire system. In the space below, please make a list of the

·         sensors you will need to set up,

·         derived waveforms and constants you will need to define, and

·         the formulas you will need to enter (including the actual equations)

3#Look over the example lab reports, particularly the abstract. What is the purpose of an abstract? What information is included in it? What information is not included in it? How does it differ from the introduction section?

In Java

Create an interface Create an interface Printing, which have a method getPageNumber () that return page number of any printing.

Create an abstract class named Novel that implements Printing. Include a String field for the novel's title and a double field for the novel price. Within the class, include a constructor that requires the novel title, and add two get methods--one that returns the title and one that returns the price. Include an abstract method named setPrice().. Create two child classes of Novel: Fiction and NonFiction. Each must include a setPrice() method that sets the price for all Fiction Novel at 89.90 SAR and for all NonFiction Novels at $124.50 SAR. Write a constructor for each subclass, and include a call to setPrice() within each. Write an application demonstrating that you can create both a Fiction and NonFiction Novel and display their fields. Save the fields as Novel.java, Fiction.java, NonFiction.java, and UseNovel.java.

Write an application named NovelArray in which you create an array that holds 8 Novels, some Fiction and some NonFiction. Using a for loop, display details about all 8 novels. Save the file as NovelArray.java.

Consider the DataSource class in below code. Explain how inheritance is intended to be used with this class. Does this represent a good use of inheritance? Explain your answer

// Base class for game configuration

public abstract class DataSource {

    private Graph map;

    private HashMap <String,Room> rooms;

    private ArrayList <Entity> entities;

    private Player player;

    protected HashMap < String, List<String[]> > tables;

    // constructor

    public DataSource() {

    }

    // Connect to the data source. Override if source is a database

    public void connect() {

    };

    // Load the configuration tables required to build the game world

    public abstract void load();

    // Build the game world

    public final void build() {

      // code omitted

    }

// Disconnect from the data source. Override if source is a database

    public void disconnect() {

    };

    // Get a the layout of the game world

    public Graph getMap() {

       return map;

    }

    // Get room details. The HashMap key is the room label.

    public Map <String,Room> getRooms() {

        return rooms;

    }

    // Get player details

    public Player getPlayer() {

        return player;

    }

    // Get entity (bats, bird, monsters, wumpus) locations

    public List <Entity> getEntities() {

        return entities;

    }  

}

What are the errors in this code?

//1.

//Filename: CarbonFootprintTest.java
//The file tests the Car class and CarbonFootprint class
public class CarbonFootprintTest {
    public static void main (String [] args) {

   CarbonFootprint[] obj = new CarbonFootprint[2];
   obj[0] = new CarbonFootprint(20);
   obj[1] = new Car(30);

    System.out.println("Carbon Foot Print for each item (lbs):\n");
    //additional info for to give general idea of program
    for (CarbonFootprint test: obj)
       test.getCarbonFootprint();

}//end main method
}//end class

//2. Filename: CarbonFootprint.java It only include

s one abstract method
public class CarbonFootprint {
    //returns the carbon footprint of an object
    public void GetCarbonFootprint();

}//end interface

//3. Filename: Car.java
public class Car extends CarbonFootprint {
   private double gallons;
   public Car( double g ){
      gallons = g;
   } // end Car constructor
   // one gallon of gas yields 20 pounds of CO2
      public abstract void GetCarbonFootprint(){
      System.out.printf( "Car that has used %.2f gallons of gas: %.2f\n",
         gallons, gallons * 20 );
   } // end function GetCarbonFootprint
} // end class Car

B) An insurance company believes that people can be divided into two categories; those who are accident prone and those who are not. The company’s statistics show that an accident-prone person will have a car accident within a one-year period with probability 0.4, whereas this probability decreases to 0.2 for a person who is not accident prone. The data also suggest that 30% of the population is accident prone. What is the probability that a new policyholder will have an accident within a year of purchasing the policy?

B)A spam filter is designed by looking at commonly occurring phrases in spam. Suppose that

80% of all emails sent are spam. In 10% of the spam emails, the phrase "free money" is used,

whereas this phrase is only used in 1% of non-spam emails. A new email has just arrived, which

does mention "free money". What is the probability that it is spam?

STEP BY STEP

F is a position dependent force given by F(x) = -e^-x. Sketch the graphs showing F(t), v(t), and x(t) for initial velocity of 10m/s, initial position of 100m, and mass = 1kg. Mention all salient points.

1. IF a collected soil sample was classified as silty clay loamusing the Soil Analysis Chart (Figure 2 in the experiment description document), what properties would you expect in the sample? (You should mention properties such as the color, porosity, and potential nutrient availability of the soil).   

1. Write two resonance structures of C₃H₃⁻ ion. Mention the formal charge of each atom.
2. A covalent bond has 3.15% ionic character. If the experimental value of the dipole moment were found to be 0.22 D, what would be the length of the covalent bond in picometer?