Julia throws a 2.0kg rock at 11.0m/s from the ground at an angle of 50 degrees from horizontal toward a building. If the base of the building is 5.0m away from her, then what is the a) Kinetic Energy and b) Work done by gravity on the rock when it hits the wall?

A transport logistics company (using trucks) is planning to purchase 30 laptops for its employees.

(i) Explain (in detail) what is meant by the term “total cost of ownership” in this acquisition?

(ii) For support purposes, you are asked to prepare a plan to prevent users from encountering problems (or even misusing) the new laptops. Select five different end user problem types and describe the common issues and preventative measures.

Share a current example of a health care reform imitative being considered at the federal or state level. What does current peer-reviewed literature from the last three years say on this topic?

How has federalism evolved from the founding of the republic to contemporary times?

How does federalism play out in any contemporary issue of your choice?

write an essay comparing and contrasting as mentioned below

Radio vs newspapers. what are the similarities and differences?

“Do you believe our unconscious reactions come out of a locked room that we can’t ever truly see inside? Can we ever know ourselves wholly and understand the motivations and reasons behind our every move? If an individual claims to completely know how her mind works, is she incredibly self-aware or is she delusional? And if we can’t ever get behind that door and fully know why we react the way we do, is psychiatry an overpriced and limited exercise?” (Gladwell, 2005, p. 13)

You own a small company. Last year you conducted a study to learn more about your customers. You found that the mean age of your customers was 31.84 years with a standard deviation of 9.84 years. This year you take a random sample of 60 customers. What is the probability that the mean age of those 60 customers is greater than 33 years?

If fungi were to disappear completely from earth what might happen? List at least 3 different consequences

C#

Write a program in C# that prompts the user for a name, Social Security number, hourly pay rate, and number of hours worked. In an attractive format, dis- play all the input data as well as the following: » Gross pay, defined as hourly pay rate times hours worked » Federal withholding tax, defined as 15% of the gross pay » State withholding tax, defined as 5% of the gross pay » Net pay, defined as gross pay minus taxes

should High Frequency trading be more regulated or not and explain why it should or shouldn't be more regulated ?

One of the main functions of saliva is to buffer against acid from food and plaque, which contributes significantly to the formation of cavities. While there are several buffers in saliva, carbonic acid (H2CO3) has the highest concentration and has the greatest effect on pH.

(a) While the salivary concentration of carbonic acid stays at a fairly constant 1.3 mM, the level of bicarbonate (HCO3-) can vary with the rate that saliva flows from salivary glands. For low flow rates, the bicarbonate concentration is around 2 mM; for medium flow rates, it is 30 mM; and for high flow rates, around 60 mM. The pKa of carbonic acid at body temperature is 6.1. Assuming that the pH of Saliva is determined primarily by carbonic acid and bicarbonate, determine the pH of saliva for each of the three flow rates. The normal pH of saliva is about 6.3.

(b) The most prevalent bacterium in the mouth, streptococcus mutans, breaks down sugar and releases lactic acid (pKa = 3.86). If S. mutans has produced 10^-8 moles of lactic acid since your last swallow, what is the pH of your saliva? What would the pH be without the bicarbonate buffer? Assume that your mouth contains about 1 mL of saliva and that your saliva is flowing at a low rate.

(c) You take a drink of orange juice, and after you swallow, 0.5 mL remains in your mouth. What is the pH of your saliva if your mouth contains 1 mL of pure saliva, and if you model orange juice as 1.0 mM citric acid (pKa = 3.13; assume only one dissociation).

(d) Why do some toothpastes contain baking soda (sodium bicarbonate)?

A eco-conscious dad notices that we left the computer and light on from the last homework. After scolding us about the electrical bill, he turns them both off, and they eventually cool to the ambient temperature of 25 ^oC.

a) What is the total change in entropy for the computer chip (or bulb) for this cooling process? Find the total entropy change for the universe. (Recall that the chip is 50. g silicon, 20. g copper, and 65 g. polyvinyl chloride, initially running at a temperature of 75 ^oC.)

b) Find the specific entropy change for the light bulb in this cooling process. Calculate the specific entropy generated for the bulb. (The light bulb is initially filled with argon, an ideal gas, at a temperature of 65.0 ^oC a volume of 40. cm³ and a pressure of 103.8 kPa. Neglect the glass and metal comprising the rest of the light bulb.)

Part 4: Explain in a couple of paragraphs how public key encryption can be used to implement a digital signature. Be sure you are very clear on when a private key is used and when a public key is used.

Part 5: Generally, a digital signature involves encrypting a cryptographic hash, or digest, generated from the message. Explain why we do not encrypt the message itself. You can answer this question in one sentence.

Part 6: For each of the following scenarios below, tell what type of encryption is most appropriate and in a sentence or two explain the reasoning for your choice.
1. Alice wants to send a confidential message to Bill, whom she has never met and who lives in a distant country.
2. Charlie wants to be sure that no one but he can see the financial and medical records he has stored on his computer.
3. David needs a way to check that large computer files stored on corporate servers have not been modified.
4. Eddard uses a "cloud" backup service; he wants to be sure the operators of the service cannot read his files.
5. Frank needs to send a message to George. The message need not be confidential, but George must be assured that it actually came from Frank.

Two different forecasting techniques (F1 and F2) were used to forecast demand for cases of bottled water. Actual demand and the two sets of forecasts are as follows:

a. Compute MAD for each set of forecasts. Given your results, which forecast appears to be more accurate? (Round your answers to 2 decimal place.)

  F1 ,F2 , None (pick one) appears to be more accurate.

b. Compute the MSE for each set of forecasts. Given your results, which forecast appears to be more accurate? (Round your answers to 2 decimal places.)

  F2 , F1 , None (pick 1) appears to be more accurate.

c. In practice, either MAD or MSE would be employed to compute forecast errors. What factors might lead a manager to choose one rather than the other?

Either one might already be in use, familiar to users, and have past values for comparison. If    (Click to select)  tracking signals  control charts  are used, MSE would be natural; if  (Click to select)  tracking signals  control charts  are used, MAD would be more natural.

d. Compute MAPE for each data set. Which forecast appears to be more accurate? (Round your intermediate calculations to 2 decimal places and and final answers to 2 decimal places.)

F1, F2 ,None (pick 1) appears to be more accurate.

Joe is a 25 year-old single worker who receives no coverage for health care from his employer. Joe has a non-fatal medical condition that can be treated at a price of $60 per treatment. Discuss how the out-of-pocket cost that Joe pays for health care will change if he switches jobs to a new employer that offers health care coverage with each of the options below. (12 points, 4 points each)

      A. a $250 per year calendar-year deductible.

      B. a 75/25 participating deductible in which the insurer pays three-quarters of the cost.

      C. an HMO that satisfies the traditional federal standards for qualification with a $20 copay