Use both the van der Waals and the Redlich-Kwong equations to calculate the molar volume of CO at 200K and 1000bar. Compare your result to the result you would get using the ideal gas equation. The experimental value is 0.04009 L-mol-1
Please explain each step.
In: Chemistry
You are an intern at the health department of your city. An outbreak of coronavirus has been detected in a hotel in your city. 10 guests are infected. You must decide whether to quarantine the hotel or not. There are 1000 guests in the hotel. From previous experience, we know that at least half of them will be infected if the quarantine goes in to effect. If there is no quarantine the virus will spread more rapidly to the general population in the city. What would you do? Your city has 8 million population. The death rate of this virus is 2%, the cost of lock down of hotel is AED 1M per day. The length of the quarantine is 2 months. What would you do? Use the five step ethical decision making approach to resolve this case and indicate which approach you will be taken.
In: Economics
In: Accounting
You purchased land 3 years ago for $75,000 and believe its market value is now $120,000. You are considering building a hotel on this land instead of selling it. To build the hotel, it will initially cost you $205,000, an expense that you plan to depreciate straight line over the next three years. Wells Fargo offered you a loan for $60,000 at an 8% interest rate to be repaid over the next 4 years. You anticipate that the hotel will earn revenues of $334,000 each year, while expenses will be a mere $75,000 each year. The initial working capital requirement will be $14,000 which will be recovered in the last year. The tax rate is 28%. Your estimated cost of capital is 15%. What is the net present value of this project?
| $139,666.75 |
| $80,929.67 |
| $831,000.00 |
| $186,089.94 |
| $192,149.88 |
In: Finance
Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table.
| Hotel A | Hotel B | Hotel C | |
|---|---|---|---|
| Sample Average ($) | 140 | 180 | 120 |
|
Sample Standard Deviation |
17.7 | 22.6 | 12.5 |
(a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.)
$______ to $______
(b)Find a 99% confidence interval for the difference in the average room rates for the Hotel B and the Hotel C chains. (Use Hotel B − Hotel C. Round your answers to two decimal places.)
$______ to $______
In: Statistics and Probability
Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table.
| Hotel A | Hotel B | Hotel C | |
|---|---|---|---|
| Sample Average ($) | 140 | 180 | 120 |
| Sample Standard Deviation |
17.7 | 22.6 | 12.5 |
(a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.)
$______ to $______
(b)Find a 99% confidence interval for the difference in the average room rates for the Hotel B and the Hotel C chains. (Use Hotel B − Hotel C. Round your answers to two decimal places.)
$______ to $______
In: Statistics and Probability
Suppose that we randomly select 50 billing statements from each of the computer databases of the Hotel A, the Hotel B, and the Hotel C chains, and record the nightly room rates. The means and standard deviations for the data are given in the table.
| Hotel A | Hotel B | Hotel C | |
|---|---|---|---|
| Sample Average ($) | 140 | 180 | 120 |
| Sample Standard Deviation |
17.7 | 22.6 | 12.5 |
(a) Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Use Hotel A − Hotel B. Round your answers to two decimal places.)
$______ to $______
(b)Find a 99% confidence interval for the difference in the average room rates for the Hotel B and the Hotel C chains. (Use Hotel B − Hotel C. Round your answers to two decimal places.)
$______ to $______
In: Statistics and Probability
Economics is everywhere – even in South Park. If you’re not familiar, South Park is an animated sitcom for adults featuring the adventures of four grade-school boys in the town of South Park, Colorado. In season 13, episode 14, the boys went to Pi Pi’s Water Park. Everybody is peeing in the pool and the pee concentration ends up being so high that it causes a flood that destroys the place. You can watch a clip of the episode here:
Tragedy of the Commons on South Park - Peeing in the Pool
While this is a silly example of tragedy of the commons, there are far more serious examples.
"More widespread wearing of face masks could prevent tens of thousands of deaths by COVID-19, epidemiologists and mathematicians project.
A model from the University of Washington's Institute for Health Metrics and Evaluation shows that near-universal wearing of cloth or homemade masks could prevent between 17,742 and 28,030 deaths across the US before Oct. 1.
The group, which advises the White House as well as state and local governments, is submitting the model for peer review, says Theo Vos., Professor of Health Metrics Sciences at IHME.
Another projection developed by researchers at Arizona State University in April showed that 24–65% of projected deaths could be prevented in Washington state in April and May if 80% of people wore cloth or homemade masks in public.
These projections shed light on the promises face masks might hold as COVID-19 cases surge in some states and more local authorities mandate the wearing of face masks."
There are several people against face mask wearing despite the recommendations from scientists and healthcare officials. See an example below:
Viewers furious with Walmart shoppers not wearing face masks
There are several options to solving or preventing the tragedy of the commons. Think about what the scientists are saying about how "Face Masks" can reduce the spread of COVID-19 and then answer the following questions:
In: Economics
Q1)According to economists, the biggest “cost” of unemployment is
a. increased “welfare” expenditures. c. the value of foregone output.
b. lost tax revenue. d. none of these.
Q2)
Which of the following statements is LEAST correct?
a. Inflation is a period of time during which the value of money is rising.
b. Affluent people – with assets other than money – can and often do benefit from inflation.
c. Both World War II (during the early 1940s) and the Vietnam War (during the late 1960s)
generated what’s known as demand-pull inflation.
d. “The Energy Crisis” of the 1970s generated what’s known as cost-push inflation.
Q3) The type of unemployment that economists find most concerning is
a. frictional unemployment. c. structural unemployment.
b. cyclical unemployment. d. voluntary unemployment.
In: Economics
The operator of a rock quarry is invited to bid on furnishing 42,000 cy of crushed aggregate for a job. The aggregate will be delivered to the job, which is 27 miles from the quarry. The aggregate will be loaded into trucks by a loader that can load at a rate of 75 cy/hr. The trucks will haul 18 cy/load at an average speed of 50 mi./hr loaded and 55 mi./hr empty. The estimated time to dump a load is 5 min. Assume a 45 min. effective hour for the loading and hauling operation.
The cost information for the job is: Royalty paid for aggregate
= $1.35/cy Overhead = $0.75/cy Profit = $1.20/cy Loader = $85.00/hr
Operator = $32.00/hr Trucks, each = $55.00/hr Truck driver, each =
$28.00/hr Foremen = $35.00/hr
a) How many trucks are required? b) What resource dictates project duration. c) What should be the bid price per cubic yard using the economic way to conduct the project?
In: Civil Engineering