Tobacco smoke, containing at least 50 known carcinogens, is often considered the most harmful and widespread contaminant of indoor air. Many airports have a designated smoking area to prevent these contaminants from spreading to the rest of the airport. Consider one such smoking area with a volume of 15 m×15 m×4 m that has 35 persons smoking two cigarettes every hour. One of the gases coming out of a cigarette is formaldehyde and each cigarette may be assumed to emit 1.35 mg of formaldehyde. Conversion of formaldehyde to carbon dioxide can be assumed to be first order and the rate of reaction is 0.40 per hour. Outside (fresh) air enters the enclosed space at the rate of 800 m3 per hour. Assume the smoke becomes completely mixed with air and this smoke-mixed air leaves the enclosed space at the same rate that the fresh air enters. Initially the formaldehyde value is zero. (a) What is the concentration of formaldehyde in the room air at steady state? (b) If the threshold for eye irritation due to formaldehyde is 0.05 ppm (parts per million), what minimum flow rate of fresh air needs to be maintained for the enclosed space? [At the assumed temperature of 25°C and pressure of 1 atm for the enclosed space, convert the formaldehyde concentration to ppm using the formula ppm =mg/m3×24.45/M, where M is 30, the molecular weight of formaldehyde]

Question about Hard Disks

1. For Redundant Arrays of Inexpensive Disks, which of the following two has more reliability? The Level 0 + 1 (Striping + Mirroring) or Level 1 + 0 (Mirroring + Striping)? Why?

2. Why does the Elevator have better performance than Shortest Seek Time First algorithm for a heavy load? (Elevator is also called the SCAN or C-SCAN)

3. Do accesses to sectors in outer tracks require less time compared to accesses sectors to inner tracks? Why or why not?

The big prediction here is how the masses, the radius, the period, and the angle interrelate. Please predict the angle that the string makes below the horizontal (the angle of declination) for the following combinations of masses, radii, and periods:

m (whirling mass) = 0.010 kg

m (hanging weight) = 0.100 kg

radius = 1 meter period =

1 second per revolution

A particle is represented by the following wave function:

(a) Use the normalization condition to find C ?

(b) Evaluate the probability to find the particle in an interval of width 0.01 at x = 0.1 (that is, between x = 0.095 and x = 0.105.)(No integral is necessary for this calculation.)

(c)Evaluate the probability to find the particle between x=0.19 and x=0.35.

(d) Find the average values of x and x², and the uncertainty of x: Δx=√(x²)_av-(x_av)²

Create the program using C#

A business records its daily sales totals. Enter the following weekly sales information into an array.

1245.67

1189.55

1089.72

1456.88

2109.34

1987.55

1872.36

Once, the information has been entered into the array. Access the items in the array to find and display the following:

• Total Sales
• Weekly Sales Average
• Largest Daily Sales
• Smallest Daily Sales

1. Delegation
   1. Describe what the confused deputy problem is

You have been asked to prepare a December cash budget for Ashton Company, a distributor of exercise equipment. The following information is available about the company’s operations:

1. The cash balance on December 1 is $45,000.

2. Actual sales for October and November and expected sales for December are as follows:

Sales on account are collected over a three-month period as follows: 20% collected in the month of sale, 60% collected in the month following sale, and 18% collected in the second month following sale. The remaining 2% is uncollectible.

3. Purchases of inventory will total $371,000 for December. Thirty percent of a month’s inventory purchases are paid during the month of purchase. The accounts payable remaining from November’s inventory purchases total $201,500, all of which will be paid in December.

4. Selling and administrative expenses are budgeted at $506,000 for December. Of this amount, $89,100 is for depreciation.

5. A new web server for the Marketing Department costing $95,000 will be purchased for cash during December, and dividends totaling $13,500 will be paid during the month.

6. The company maintains a minimum cash balance of $20,000. An open line of credit is available from the company’s bank to increase its cash balance as needed.

Required:

1. Calculate the expected cash collections for December.

2. Calculate the expected cash disbursements for merchandise purchases for December.

3. Prepare a cash budget for December. Indicate in the financing section any borrowing that will be needed during the month. Assume that any interest will not be paid until the following month.

On November 1, 2016, Gordon Co. collected $4,920 in cash from its tenant as an advance rent payment on its store location. The six-month lease period ends on April 30, 2017, at which time the contract may be renewed.

1. Use the horizontal model to record the effect of the six months of rent collected in advance on November 1, 2016 for Gordon Co. (Use amounts with + for increases and amounts with – for decreases.)
2. Use the horizontal model to record the effect of the adjustment that will be made at the end of each month to show the amount of rent "earned" during the month for Gordon Co. (Use amounts with + for increases and amounts with – for decreases.)
3. Record the journal entry to show the effect of the six months of rent collected in advance on November 1, 2016 for Gordon Co. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)
4. Record the journal entry to show the effect of the adjustment that will be made at the end of each month to show the amount of rent "earned" during the month for Gordon Co. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)
5. Calculate the amount of unearned rent that should be shown on the December 31, 2016, balance sheet with respect to this lease.
6. Suppose the advance collection received on November 1, 2016, covered an 30-month lease period at the same amount of rent per month. How should Gordon Co. report the unearned rent amount on its December 31, 2016, balance sheet?

(Management and Administration in Early Childhood Education)

2. Discuss two important roles and responsibilities that you as a teacher undertake in supervising children at your early childhood education setting. (1000words)

GIVE A THOROUGH EXPLANATION FOR WHY THIS STATEMENT IS TRUE & PROVIDE A RELEVANT GRAPH

1. The Elasticity of demand for labor is higher the higher the elasticity of supply of the substitutable input.

2. SL = MFC in a perfectly competitive input firm or for an imperfectly competitive firm that hires heterogeneous labor (or practices wage discrimination).

Some critics of big business argue that CEOs are overpaid and that their compensation is not related the performance of their company. To test this theory, data on executive's total pay and company's performance was collected from a randomly selected set of fifty companies.

A. Identify the independent variable(s) - If any (and define them precisely and indicate whether they are qualitative or quantitative).

B. Identify the dependent variable - if any (and define them precisely and indicate whether they are qualitative or quantitative).

C. Identify the type of analysis that is appropriate (Chi- Square test of independence, ANOVA, Regression, or Correlation)

D. Justify why the analysis you identified in part C is correct.

Consider the following economy:

Labor supply: N_t= 90

Capital stock: K_t = 90

Government spending: G_t = 20

Tax collections: T_t = 20

Production function: Y_t = 2(K_t)^0.5 (N_t)^0.5

Real money demand L_t = 2Y_t - 200r_t

Consumption function: C_t = 16 + 0.8(Yd)_t

Domestic price level: P_t = 4

Investment function: I_t = 25 - 50r_t

Nominal money supply: M_t = 1296

QUESTIONS:

1. (7 points) Find an expression for the IS curve.
2. (7 points) Find an expression for the LM curve.
3. (7 points) Find an expression for the aggregate demand curve.
4. (7 points) What are the short run equilibrium values for output, interest rate and price level?
5. (7 points) Plot (a)-(d) on the IS-LM and AD-SRAS-LRAS diagrams. Make sure to label (i) the axes, (ii) the curves and (iii) the initial equilibrium levels.
6. (7 points) Is this a short-run level of output also a long-run equilibrium? Explain.
7. (7 points). Suppose that the government the Fed increases money supply to M^s=1620. Find the new short-run equilibrium levels of output and interest rate
8. (7 points) Find the long-run equilibrium levels of output, interest rates and prices.
9. (7 points) Graph this combination of policies both in the short and in the long run.
10. (7 points) Explain how the adjustment from the short-run to the long-run occurs.

What is the acceptance cone angle of a multimode optical fiber assuming that light is passing through some coupling oil at the LED driver source end and that oil has refractive index about that of olive oil, where 1) the core is high-index flint glass and the cladding is Plexiglas 2) the core is crown class and the clad is soda lime glass?

a. What is hypothesis testing in statistics? Discuss

b. Does Type I error being considered more serious than Type II error? Explain

c. What is the p-value of a test? Give an example