What is the ratio of the mass of fresh water produced to the mass of water in the incoming brine?Multi-stage flash distillation is used to desalinate seawater so it is fit for human consumption. A flash distillation tank is composed of small chambers (called \"stages\"), each at a lower pressure than the previous stage. Salt water enters the first chamber, some fresh water flash evaporates, condenses, and is removed from the distillation tank. The remaining salt water moves to the next chamber, some fresh water flash evaporates, condenses, and is removed from the distillation tank. The remaining salt water moves to the next chamber, and the process repeats until very salty water is expelled as waste. Brine that is 35,000 ppm salt is desalinated through a 5-stage flash distillation process. The pressure in the stages is such that 8.5% by mass of the water entering the stage evaporates and leaves as fresh water. If the desalination plant wants to produce 1200.0 gallons of drinking water per day, how many gallons of brine must the plant take in per day? The density of fresh water is 1.000 g/cm3. The density of brine is 1.025 g/cm3.
What mass of waste brine is expelled in one day?
What is the ratio of the mass of fresh water produced to the mass of water in the incoming brine?
The larger this ratio is, the more fresh water is produced for the given incoming water. If additional stages are added, each removing 8.5% of the available incoming water, so that the above ratio gets above 0.5, what are the total number of stages in the multi-stage flash distillation tank? (respond with a whole number)
The energy requirement of this type of desalination plant is 25.5 kW·h/m3 of fresh water. How much energy does the plant require to produce 1200.0 gallons of fresh water?
In: Chemistry
In: Economics
As auditor for Checkem & Associates, you have been assigned to review Cullumber Corporation’s calculation of earnings per share for the current year. The controller, Mac Taylor, has supplied you with the following calculations:
Net income $3,538,109
Common shares issued and outstanding:
Beginning of year 1,374,960
End of year 1,200,000
Average 1,242,500
Earnings per share: $3,374,960/1,242,500= $2.72 per share
You have gathered the following additional information:
1. The only equity securities are the common shares.
2. There are no options or warrants outstanding to purchase common shares.
3. There are no convertible debt securities.
4. Activity in common shares during the year was as follows:
Outstanding, Jan. 1 1,285,000
Shares acquired, Oct. 1 (250,000)
1,035,000
Shares issued, Dec. 1 165,000
Outstanding, Dec. 1,200,000
Instructions
a) Based on the information, of you agree with the controllers calculation of earnings per share for the year? If disagree, provide revised calculation
b) Assume the same facts except that call options had also been issued for 140,000 common shares at $10 per share. These options were outstanding at the beginning of the year and none had been exercised or cancelled during the year. the average market price of the common shares during the year was $20 and the ending market price was $25. prepare a calculation of earnings per share.
In: Accounting
|
5. When you are evaluating the difference between population means (quantitative dependent variable), with more than 2 categories of the independent variable, the most appropriate statistical test to utilize would be a one variable chi-square test.
|
6. A calculated correlation coefficient of 0.99 between variables A and B implies that variable A causes variable B.
| True |
| False |
7. Which of the following is NOT a possible value for a calculated F statistic?
| 21.64 |
| 0.92 |
| 4.82 |
| -2.19 |
| All of the listed choices are possible values for a calculated F statistic. |
8. A large student organization at CSUN claims it has an equal distribution of people from each of the 9 colleges (e.g., business, humanities). You are interested in investigating whether or not this claim is accurate. To do so, you first take a sample of students from the organization. What would be the most appropriate test to utilize with your sample data to help answer this research question?
| One-factor ANOVA |
| One variable chi-square test |
| Two variable chi-square test |
| Correlation |
| None of the above tests would be appropriate. |
9. You are presented with 4 different correlation coefficients (r): 0.65, -0.34, -0.86, and 0.19. Which of the following lists correctly represents the 4 r’s placed in order of strength from weakest to strongest.
| -0.86, -0.34, 0.19, 0.65 |
| 0.19, -0.34, 0.65, -0.86 |
| 0.65, 0.19, -0.34, -0.86 |
| -0.34, -0.86, 0.65, 0.19 |
| 0.65, -0.86, 0.19, -0.34 |
10.
In which direction is the χ2 (chi-square) distribution skewed?
| Positively |
| Negatively |
| No skew |
| Below 0 |
| None of the listed choices are correct. |
In: Math
The National Collegiate Athletic Association (NCAA) requires Division II athletes to score at least 820 on the combined mathematics and reading parts of the SAT in order to compete in their first college year. The scores of the 1.5 million high school seniors taking the SAT last year are approximately Normal with mean 1026 and standard deviation 209. For an SRS size 200
1) Find the mean and standard deviation of x bar
2) What is the distribution of x bar?
3) What is the probability that a sample mean value exceeds 1028?
4) The highest 2.5% of sample mean value are higher than ____
5) Has the average score increased since last year? To answer this, do the followings:
I. A SRS size 200 gives a sample mean of 1028. State hypotheses, find the test statistic, pvalue, and express your conclusion using a significance level of α=2.5%.
a. Hypotheses (Use notations)
b. test statistic
c. pvalue
d. Conclusion? Include practical terms.
II. Find a 95% confidence interval for the mean SAT score.
In: Math
Consider the equilibrium reaction
CO(g)+H2O(g)⇋CO2(g)+H2(g)
Determine how each change in the left-hand column will stress the system and in which direction the equilibrium reaction will shift in response.
Drag the appropriate labels to their respective targets
| Change | System Stress | Equilibrium shift |
| Add CO(g) | ||
|
Remove H2O(g) |
||
| Add CO2(g) | ||
| Remove H2(g) |
Choices for equilibrium shif:
Forward reaction rate temporarily decreases, Reverse reaction rate temporarily decrease, Reverse reaction rate temporarily increases, Forward reaction rate temporarily increases
Choices for system stress:
increase reactant , increase product, decrease product, decrease reactant
In: Chemistry
A 195-kg rugby player running east with a speed of 4.00 m/s tackles a 95.0-kg opponent running north with a speed of 4.5 m/s. Assume the tackle is a perfectly inelastic collision. (Assume that the +x-axis points towards the east and the +y-axis points towards the north.)
(a) What is the velocity of the players immediately after the tackle?
| magnitude | _____ m/s |
| direction | ________ ° counterclockwise from the +x-axis |
(b) What is the amount of mechanical energy lost during the
collision?
______J
In: Physics
A company uses a combination of three components- A, B and C to create three different drone designs. The first design Glider uses 3 parts of component A and 2 parts of components B. Design Blimp uses 2 parts of component B and C, and the last design, Pilot uses one part of each component. A sample of 75 components, 25 A, 25 B, 25 C, will be used to make prototypes for the various designs. If 30 components are selected at random, what is the likelihood two prototypes of each design can be made?
In: Math
In: Biology
Discuss a specific situation where association rules are used, or could be used, in your organization or in one with which you are familiar. Which association rules are relevant to the organization and why?
In: Computer Science
What are some outcomes/consequences of high job satisfaction?
can you identify situations in which your job attitudes directly influenced your behavior?
In: Operations Management
1.Create a standard Java project (i.e. not a JavaFX project) in NetBeans called Personsages
2.Declare a Scanner variable called keyboardInput and a variable called personAge as type int. Code the statement to read in an integer with a prompt to "Enter your age as an integer:".
3.Code an "if/else if" (also called a multi-way if) block to output the following text based on age ranges personAge might contain:
4.Code an "if / else" statement to determine if the age entered in Step 9 is on/before the year 1990 or after 1990 outputting the message that the person was born on/before or after 1990.
5.Declare a String variable called aCityInNY and read in a String from the keyboard with a prompt "Enter Albany, Buffalo, New York, Rochester, or Binghampton to see its population:".
6.Code a switch block to compare the value input to the cities just mentioned. Output "Population is: " with the population of each city (you are not being tested on the actual population). If the user enters any other city or text, output an appropriate error message to the user.
7.Declare an integer variable called intInput and assign it a 0. Declare a Boolean called keepLooping and set to true. Code a while loop with keepLooping as the condition.
8.In the body of the while loop, code a prompt that says “Input a number – enter 999 to exit:”. Use a Scanner method to get an integer from the keyboard and assign it to intInput. Output the number only if it does not equal 999, else set keepLooping false.
9.Declare a variable called loopInt. Code a for loop that uses loopInt and counts from 0 to 9.
10.In the for loop body, output “For Loop Counter = “ + loopInt.
11.After the for loop, set the loopInt variable to 0. Code a do-while loop that ends after loopInt is 9.
12.In the body of the do-while, output “Do-While Loop Counter = “ + loopInt. Code a statement to increase loopInt by 1.
13.After the while loop, declare an int variable called
loopIntInner and an int variable called loopIntOuter. Code a for
loop that counts loopIntOuter from 0 to 4. This is the outer loop.
In the body, code another for loop (this is the inner loop) that
counts loopIntInner from 0 to 2. In the body of the inner loop put
an output statement that outputs “loopIntOuter: “ + loopIntOuter +
“ loopIntInner: “ + loopIntInner.
14.Run the program with 32 as the age prompt in Step 9.
15.Enter at least one valid city for Step 12.
16.Enter at least 2 numbers for 15 and then 999.
In: Computer Science
Please use python.
Step a: Create two DataFrames df1 and
df2 from the following two tables that hold
student scores. Each DataFrame has four rows and
three columns.
|
df1: |
df2: |
|||||
|
Name |
Course A |
Course B |
Name |
Course C |
Course D |
|
|
Adam |
80 |
84 |
Bob |
65 |
72 |
|
|
Bob |
74 |
76 |
David |
85 |
82 |
|
|
David |
78 |
83 |
Eva |
76 |
80 |
|
|
Tom |
85 |
82 |
Tom |
90 |
88 |
Step b: Join the two DataFrames into df3 so that it only includes the students who appear in both tables. Print df3.
Step c: Set the column 'Name' as the index of df3 using df3.set_index() function. Print the updated df3. You can learn from https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.set_index.html.
Step d: Show the average score of each student in df3.
In: Computer Science
Research any literature/articles that address globalization and its challenges in the context of management…..Discuss in specific terms the challenges and how they are or can be overcome and their respective applicable solutions. Highlight the strategic approaches that managers develop and implement to gain a sustainable competitive advantage. Is globalization a greater challenge or threat to dynamic organizational structures than static organizational structures? Elaborate how you could device a workable method to resolving the challenges or threats. Provide logically-connected organizational management leaders who have made history in this regard.
In: Operations Management
A 100.0 m rod with a diameter of 3.0mm has a charge of 1004.0C. What is the approximate electric field 2.0mm from the surface of the rod, not near either end?
A) 9.0*1011 r N/C
B) - 9.0*1011 r N/C
C) - 5.2*1013 r N/C
D) 5.2*1013 r N/C
The answer is D, I am not sure how they got that answer, can you please explain and show your work. Thanks in advance
In: Physics