Discuss the fundamental principles, instrumentation, and analytical capabilities of thefollowing techniques:

•Potentiometry

•Cyclic voltammetry

•Anodic Stripping voltammetry

(b) Which technique is most selective for the determination of Calcium? Explain.

(c) Using a typical example, discuss the mechanism of ionization used in mass spectrometry

A furniture maker has 4,200 wood units and 8,000 hours available, during which it will manufacture decorative screens. Previously, 2 models have been sold well, so it will be limited to producing these 2 types of furniture. He estimates that model one requires 5 units of wood and 7 hours of available time, while model 2 requires 2 units of wood and 8 hours. The utility that each model provides is 120 dollars. and 80 dollars, respectively. What is the maximum utility that this manufacturer can achieve? USING SIMPLEX METHOD

JAVA

Design and implement a class called Boxthat represents a 3-dimensional box.1.Instance DataYour Box class will need variables to store the size of the box. All of these variables will be of type ‘private double’.•width•height•depthYour Boxclass will also need a variable to keep track of whether or not the box is full. This will be of type ‘private boolean’.•full2.ConstructorDeclaration: public Box( double width, double height, double depth)•Your Boxconstructor will accept the width, height,and depthof the box.•In your constructor, initialize the width, height,and depthinstance variables to values passed in as parameters to the constructor.•Each newly created box will be empty. This means that you will also need to initialize fullto false in your constructor.3.Getter and Setter MethodsInclude getter and setter methods for all instance data. We will assume that all supplied dimension values are positive values. Here is an example of the method declarations for width to get you started.•Getter: public double getWidth()•Setter: public void setWidth(double width)4.Public Methods•Write a public double volume()method that will calculate and return the volume of the box based on the instance data values.•Write a public double surfaceArea()method that will calculate and return the surface area of the box based on the instance data values.5.toString MethodWrite apublic String toString() method that returns a one-line description of the box. The description should provide its dimensions and whether or not the box is full. Format all double values to 2 decimal places.Example: An empty 4.00x 5.00 x 2.00 box.Part 2: Testing your ClassNow, create a driver class called BoxTestand do the following in the main method.Create your first box1.Create a Boxvariable called smallBoxand instantiate it with width 4, height 5, and depth 2.2.Print the one-line description of smallBoxusing its toString()method.3.Confirm that smallBox’s width, height, and depth getter methods are returning the correct values.4.Confirm that smallBox’s volume()and surfaceArea()methods are returning the correct values.5.Use smallBox’s setter methods to change it from “empty” to “full” and to change its dimension values to width 2, height 3, and depth 1.6.Print the one-line description of smallBoxusing toString()again, and confirm that all changed values are reflected.7.Confirm that all getter and other methods return the correct values reflecting smallBox’s current dimensions and full value.Create several boxes and find the largest oneDo not delete what you did above! Add the following code to the end of your BoxTestclass.1.Declare and instantiate an ArrayListobject that will store your Boxobjects.See the listing below as a sample of how to use the ArrayListbut with Stringobjects.2.In a standard “for” loop that iterates 5 times, create a new Boxwith randomly generated width, height, and depth and add the box to your ArrayList. Limit dimension values to a reasonable range. Randomly generate a Boolean value and use it to call the Box’s method for setting “full” (use the nextBoolean()method in the Randomclass).3.In the loop, print outthe Box’s details, labeled according to the loop iteration (i.e. if this isthe first iteration of the loop, label the box as “Box 1: “ in the output).4.Use a for-each loop(as shown in the listing above)to find the Boxwith the largest volume. You will need to declare a largest box variable of type Boxto keep track of the largest box. This variable needs to be declared outside of the loop so that it will still be available when the loop ends. Use conditional statements inside the loop to compare the current Box to the largest Box, so far, and update the largest box variable when appropriate.5.After the loop, print the details of the largest Box. Confirm that you program identified the correct boxes.

1a. Steven has a job with monthly take-home pay of $3,500. Using the suggested maximum debt safety ratio, what maximum debt burden per month can he assume? (Show all work.)

1b. Jack and Jill have a combined take-home income of $4,500. Their total monthly payments on consumer debt are $875. What is their debt safety ratio? Are they exhibiting any sign of approaching credit problems?

1c. You have a $926 balance on your credit card account. The minimum payment on your account is 2 percent of the latest balance or $20, whichever is greater. What will be the minimum payment this month?

1d. The APR on this account is 18%. Assuming the $926 does not include any interest charge, how much of your minimum payment will be used for interest?

create a program that will calculate a student s grade in a class that uses a weighted gradebook

I would like to have the best explanation. I will appreciate all your hard work.

22. At what temperature do the atoms of argon (Ar) gas have the same rms speed as the molecules of oxygen (O2) gas at 25°C? The molar mass of oxygen is 15.9994 g/mol, and the molar mass of argon is 39.948 g/mol. ANSWER: 99ºC

29 A stone is dropped into a well. The sound of the splash is heard 3.5 s later. What is the depth of the well? Take the speed of sound in air to be 343 m/s. ANSWER h = 54.8m

Question 3: Write the following Java program.

A. Create a class called Quadrilateral that contains the following: [4 Marks]

• Five double type data fields for: side1, side2, side3, side4, and perimeter

• A no-argument constructor that creates a Quadrilateral with all sides equal to 1

• Methods named setSide1(double s1), setSide2(double s2), setSide3(double s3), and

setSide4(double s4) to set the values of the four sides

• A method named calculatePerimeter( ) to calculate and return the perimeter of the

quadrilateral

B. Create a child class called Square that contains a method named calculateArea() to

calculate the area of the Square. [2 Marks]

C. Create a java main class named TestQuad to do the following: [4 Marks]

• Create a Quadrilateral object named Quad1 and a Square object named Sq1.

• Call the methods setSide1(double s1), setSide2(double s2), setSide3(double s3), and

setSide4(double s4) to:

o set the sides of Quad1 to 10, 20, 25, and 30, respectively

o set all sides of Sq1 to 3

• Display the perimeter of Quad1 by calling the method calculatePerimeter ( ). Display

the perimeter of Sq1 by calling the method calculatePerimeter ( ).

• Display the area of Sq1 by calling the method calculateArea()

Hint: Perimeter = sum of all sides & Area of Square = side * side

write an essay about Special Order Decisions in your own words.

A family is considering installing a household solar energy system. The system has an installed cost of $1700 and they reduce the homeowner’s energy bill by $400 per year. The residual value of the solar panels is $150 at the end of their 5-year life. What is the annual effective IRR of this investment? Assume the family has a MARR of 10%. Please use the interpolation method and only fill in the number of your calculated result in the blank, e.g., if the result is 7.537%, fill in “7.54”; also keep 2 digits after the decimal point.

The following is extracted information from financial statements of Kabuku Ltd for the years 2005 to 2009

Balance Sheet as at year end 31^st Dec

You are required to carry out the following analyses;

Common size balance sheet for the five years. and interpret.

Acid/Base Equilibrium - Weak Acids/Bases

1. Estimate the initial [HClO] in an aqueous solution in which the [OCl^-] is 0.0000114 M at equilibrium (make an exact calculationassuming that initial concentration is not equal to the equilibrium concentration).

(Constant = K_a=3.50×10^-8)

HClO = OCl^- + H⁺

^{_________________ M}

3. Calculate the molar concentration of H⁺ ion of a 1.31×10^-2 M solution of the weak acid HClO (make an exact calculationassuming that initial concentration is not equal to the equilibrium concentration). Round your answer to 3 significant digits.

(Constant = K_a=3.50×10^-8)

HClO = OCl^- + H⁺

he following costs result from the production and sale of 4,900 drum sets manufactured by Tight Drums Company for the year ended December 31, 2017. The drum sets sell for $340 each. The company has a 35% income tax rate.

Required:

1. Prepare a contribution margin income statement for the company.
2. Compute its contribution margin per unit and its contribution margin ratio.

How many grams of dry NH4Cl need to be added to 2.20 L of a 0.600 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.50? Kb for ammonia is 1.8×10−5.

Question 2 (1 point)

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Your aunt tells you that she will give you $100 today. However, if you are willing to wait, she will give you $105 in one year. You are convinced your aunt will follow through, so there is no risk in waiting. In this case,

Question 2 options:

Question 8 (1 point)

Your friend needs a loan now and is willing to pay you back $150 in 1 year and another $150 in 2 years. (i.e. you will receive both payments) How much are you willing to lend your friend now if you want an interest rate of 6%?

Question 8 options:

Calculate ? H for the reaction: C4H4(g) + 2 H2(g) — > C4H8(g) ? H = ?

Given,

C4H4(g) + 5 O2(g) — > 4 CO2(g) + 2 H2O(l) DH = -2341 kJ

C4H8(g) + 6 O2(g) — > 4 CO2(g) + 4 H2O(l) DH = -2755 kJ

H2(g) + ½ O2(g) — > H2O(l) DH = -286 kJ