Suppose that 26 mL of 0.10 M HCl is added to 1.000 L of saturated Mg(OH)2' which contains more than enough Mg(OH)2(s) to react with all of the HCl.

A.) After the reaction has ceased, what will the molar concentration of Mg2+ be?

B.) What will the pH of the solution be?

1. Cherry hill Inc.’s balance sheet is shown below:

Cherry hill wishes to acquire equipment worth US$20,000. It can either buy
it by borrowing the required amount at a 10% rate of interest or it can
take it on lease for a period of 5 years. If it leases it, the lease rental would
be US$5276 per year. Assume taxes are absent.
Show the balance sheet of Cherry hill Inc. if:
(a) It finances the equipment with debt
(b) It leases the equipment as an operating lease
(c) It leases the equipment as a financial lease (hint: find the present
value of lease rentals at a discount rate of 10%)

Freezing point depression experiment

1/what effect does the presence of a nonvolatile solute have upon the freezing point of a solution?

2/Explain the diffrence between molarity and molality. What are the units on each?

3/what is the molality of a solution that contains 5.2g of urea(molar mass = 60g/mol)in 250g of benzene(c6H6)?

1) As a software engineer what are your legal and ethics responsibilities when you work for medical and military application?

2) What are the two levels of system design? Describe their corresponding main purpose briefly

3) What is double blind test? How to use this test to objectively compare the goodness of two software system, (e.g... google vs Bing.)

4) Define and Describe the main pros and cons of three software cost estimation methods

Compare the following concepts ( state the respective definitions and the difference)

- understandability vs user-friendliness

-software debugging vs. software testing

-black-box testing vs white-box testing

-software re-engineering vs reverse software engineering

Prepare a report for management, stating the advantages and disadvantages of each depreciation method. Include in the report your recommendations on the choice of method consistent with the requirements of IAS 16/AASB 116. Support your recommendations with schedules showing the total annual cost of operating the machinery, and the profit after depreciation.

The transactions of Spade Company appear below. Kacy Spade, owner, invested $11,250 cash in the company in exchange for common stock. The company purchased office supplies for $326 cash. The company purchased $6,221 of office equipment on credit. The company received $1,328 cash as fees for services provided to a customer. The company paid $6,221 cash to settle the payable for the office equipment purchased in transaction c. The company billed a customer $2,385 as fees for services provided. The company paid $530 cash for the monthly rent. The company collected $1,002 cash as partial payment for the account receivable created in transaction f. The company paid $1,200 cash in dividends to the owner (sole shareholder). Required: 1. Prepare general journal entries to record the transactions above for Spade Company by using the following accounts: Cash; Accounts Receivable; Office Supplies; Office Equipment; Accounts. Payable; Common Stock; Dividends; Fees Earned; and Rent Expense. Use the letters beside each transaction to identify entries. 2. Post the above journal entries to T-accounts, which serve as the general ledger for this assignment.

Two methods of maintenance for indefinite service life are being evaluated:

Method 1. The first cost would be $60,000, and $25,000 would be required at five-year intervals forever.

Method 2. The first cost would be $150,000, and $180,000 would be required at 50-year intervals of forever.

At I i = 12%, which method is the better one?

Describe how you would adapt the RGB color model in WebGL to allow you to work with a subtractive color model.

Answer question 2!!

1. a boat is bobbing up and down on the water as waves pass underneath it. The depth of the water under the boat oscillates between 3 m and 4 m. The boat is stationary with respect to the shore and it is 2.9s between the crests of successive waves. A person on shore sees the crests of the wave passing by at 2 m/s. what is the distance between crests of this wave?

2. Two ducks are floating close together on the water near the boat in problem 1. When the first duck is on the peak of a passing wave the second duck is 30 cm below it and moving upwards. How far apart are the ducks?

Cyber Security class

1. Your task is to compute a session key KAB in Diffie-Hellman Key Exchange (DHKC) with Elliptic Curves. Your private key is a = 6. You receive Bob’s public key B = (5,9). The elliptic curve being used is defined by y2 ≡ x3+x+6 mod 11.

2. In RSA Digital Signature, Suppose Bob wants to send a signed message (x = 4) to Alice. The first steps are exactly the same as it is done for an RSA encryption: Bob computes his RSA parameters and sends the public key to Alice. We know p = 3, q =11, and bob choose e=3. (Hint: We learn RSA algorithm and key generation in Week 7)

(a) What is the public key pair Bob sends to Alice?

(b) What is the value of signature s?

(c) What is the value of verkpubA(x,s)? Show all intermediate steps clearly.

Prove in RSA digital signature, verkpubA(x,s) = x

public class ValidBST {


    class BSTTest<Key extends Comparable<Key>, Value> {
        private Node root;             // root of BST

        private class Node {
            private Key key;           // sorted by key
            private Value val;         // associated data
            private Node left, right;  // left and right subtrees

            public Node(Key key, Value val) {
                this.key = key;
                this.val = val;
            }
        }

    }


    public boolean isValidBST(BSTTest bst) {






        return false;
    }

    public static void main(String[] args) {

    }
}

In 2014, MusicLand has credit sales of $400,000. MusicLand also has $50,000 in accounts receivable on December 31, 2014. MusicLand has a $200 credit balance in allowance for uncollectible accounts before adjusting entries.

Assume that MusicLand uses B/S approach to estimate bad debt expense and allowance for uncollectible accounts. MusicLand estimates that 5% of accounts receivable are uncollectible. Find bad debt expense for 2014 and allowance for uncollectible accounts at the end of 2014.

According to Theodore Moran, when do the greatest spillovers on the local economy occur?

Select one:

a. When there is an appropriate balance between multinational corporations and the state in productive decision-making

b. None of the choices given (above/below)

c. When the multinational corporation is free to make the productive decisions

d. When the UN is responsible for regulating productive decisions.

e. When the state is responsible for regulating productive decisions

SmartAuto Manufacturing is engaged in the production of replacement parts for automobiles. One plant specializes in the production of two parts: Part #127 and Part #234. Part #127 produced the highest volume of activity, and for many years it was the only part produced by the plant. Five years ago, Part #234 was added. Part #234 was more difficult to manufacture and required special tooling and setups. Profits increased for the first three years after the addition of the new product. In the last two years, however, the plant faced intense competition, and its sales of Part #127 dropped. In fact, the plant showed a small loss in the most recent reporting period.

Much of the competition was from foreign sources, and the plant manager was convinced that the foreign producers were guilty of selling the part below the cost of producing it. The following conversation between Patricia Wang, plant manager, and James Tin, divisional marketing manager, reflects the concerns of the division about the future of the plant and its products.

JAMES:           You know, Patricia, the divisional manager is real concerned about the plant's trend. He indicated that in this budgetary environment, we can't afford to carry plants that don't show a profit. We shut one down just last month because it couldn't handle the competition.

PATRICIA:      James, you and I both know that Part #127 has a reputation for quality and value. It has been a mainstay for years. I don't understand what's happening.

JAMES:           I just received a call from one of our major customers concerning Part #127. He said that a sales representative from another firm offered the part at $20 per unit – $11 less than what we charge. It's hard to compete with a price like that. Perhaps the plant is simply obsolete.

PATRICIA:      No. I don't buy that. From my sources, I know we have good technology. We are efficient.

And it's costing a little more than $21 to produce that part. I don't see how these companies can afford to sell it so cheaply. I'm not convinced that we should meet the price. Perhaps a better strategy is to emphasize producing and selling more of Part #234. Our margin is high on this product, and we have virtually no competition for it.

JAMES:           You may be right. I think we can increase the price significantly and not lose business. I called a few customers to see how they would react to a 25 percent increase in price, and they all said that they would still purchase the same quantity as before.

PATRICIA:      It sounds promising. However, before we make a major commitment to Part #234, I think we had better explore other possible explanations. I want to know how our production costs compare to those of our competitors. Perhaps we could be more efficient and find a way to earn our normal return on Part #127. The market is so much bigger for this part. I'm not sure we can survive with only Part #234. Besides, my production people hate that part. It's very difficult to produce.

After her meeting with James, Patricia requested an investigation of the production costs and comparative efficiency. She received approval to hire a consulting group to make an independent investigation. After a three-month assessment, the consulting group provided the following information on the plant's production activities and costs associated with the two products:

* Calculated using a plantwide rate based on direct labor hours. This is the current way of assigning the plant's overhead to its products.

The consulting group recommended switching the overhead assignment to an activity-based approach. It maintained that activity-based cost assignment is more accurate and will provide better information for decision making. To facilitate this recommendation, it grouped the plant's activities into homogeneous sets with the following costs:

Dana Company projects a sales revenue of $150,000 during the calendar year 2014. Using the income statement provided below, prepare a pro-forma income statement using the percent-of-sales method.

Income Statement

Dana Dairy Products

For the Year Ended December 31, 2013