Suppose you wanted to harness to power of wind to generate electricity. One question you might want to ask is: what is the amount of power my wind turbine can produce? To answer this question, you will need at least the following information: The average wind speed (in m/s) The operating efficiency of your wind turbine (in %) The radius of the blades on your wind turbine (in meters)

Suppose you wanted to harness to power of wind to generate electricity. One question you might want to ask is: what is the amount of power my wind turbine can produce? To answer this question, you will need at least the following information:

• The average wind speed (in m/s)
• The operating efficiency of your wind turbine (in %)
• The radius of the blades on your wind turbine (in meters)

To compute the maximum power output for your wind turbine, you would need the following math formulas:

• A= πr², which represents the cross-sectional area of a circle (π = 3.14159265).
• P_max = 0.5ρAv³, which calculates the maximum available power given the wind speed in m/s (ν), cross-sectional area of the blades in m² (A), and the density of the air (ρ = 1.2 kg/m³).

Once you have the maximum available power, computing the actual amount of power (not the maximum) produced by the wind turbine is a matter of determining the amount of power based on the operating efficiency.

Exercise #1: Create a Java class called WindPowerIST140, and save the file as WindPowerIST140.java in your Java development environment. This program will ultimately compute the amount of power produced by a wind turbine, but we will be building the program in stages. In this exercise, we will take care of the user input. Your program should take three double inputs:

• The average wind speed (in m/s)
• The operating efficiency of your wind turbine (in %)
• The radius of the blades on your wind turbine (in meters)

Your program should create three variables to store these values, followed by appropriate user prompts and input statements (Hint: use the Scanner class). Once the input is complete, your program should end. Here are few sample tests you can run to check if your program is working correctly; your prompts should appear exactly as shown here, and you can type in the listed input values when prompted:

Exercise #2: Now that you have the input statements complete, you will add code to echo-print the input values to the user along with descriptive messages and units. This will simply involve adding three System.out.printf statements to your code. All numeric amounts should be precise to two decimal places: remember this involves using the %f edit descriptor with the System.out.printf method, as shown below:

Here are few sample tests you can run to check if your program is working correctly:

Exercise #3: Now you are ready to perform the calculations. Add two double variable declarations to your code (one for maximum power, one for actual power) and use the aforementioned formulas to compute the wind turbine maximum power value. Remember that the actual power is the product of the maximum power and the operating efficiency. Store the results in your two variables. and add a System.out.printf statement to your code to display the contents of those variables. Here are few sample tests you can run to check if your program is working correctly: