Questions
During an experiment to simple vapour compresion cycles in the HVAC lab at Faculty of Engineering,...



During an experiment to simple vapour compresion cycles in the HVAC lab at Faculty of Engineering, Rabigh , the following data are obtained:-
• The temperature enter to the compressor is "saturated vapor condition".
• The temperature exit the compressor is 55 0C.
• The temperature enter to the expansion device is 18.5 0C.
• The evaporator gauge pressure is 3.05 bar.
• The condenser gauge pressure is 10.7 bar.
• The volume flow rate at the evaporator entrance is 1.5 lit,/min
Complete the thermos-fluid Lab. Experiment #1 (attached file) that include the following exercises:-
Exercise No.1
Representation of the refrigeration cycle on the p-h diagram
Complete the table for inlet and exit conditions from each component (compressor, condenser, expansion device, and evaporator).
.
Exercise No.2
Energy analysis of compressor

Exercise No.3
Energy analysis of condenser

Exercise No.4
Energy analysis of evaporator

Exercise No.5
Calculate the coefficient of performance and refrigeration capacity?

In: Mechanical Engineering

Construct a 95% confidence interval for an experiment that found the sample mean temperature for a...

  1. Construct a 95% confidence interval for an experiment that found the sample mean temperature for a certain city in August was 101.82, with a population standard deviation of 1.2. There were 6 samples in this experiment.
  1. A group of 10, foot - surgery patients had a mean weight of 240 pounds. The sample standard deviation was 25 pounds. Find a confidence interval for a sample for the true mean weight of all foot – surgery patients. Find a 95% Confidence Interval.
  1. 510 people applied to the Bachelor’s in Elementary Education program at Florida State College. Of those applicants, 57 were men. Find the 90% Confidence Interval of the true proportion of men who applied to the program.

  1. A study revealed that 65% of men surveyed supported the war in Afghanistan and 33% of women supported the war. If 100 men and 75 women were surveyed, find the 90% confidence interval for the data’s true difference in proportions.

In: Computer Science

A charge neutral macrocyclic ligand having four donor atoms froms a red, diamagnetic complex of Ni(II)....

A charge neutral macrocyclic ligand having four donor atoms froms a red, diamagnetic complex of Ni(II). The counter ions for this complex is the very weak Lewis base, ClO4-. When ClO4- is replaced by thiocyanate, violet complex forms.

a. Draw the structures of the red and violet complexes such that thier geometires can be decerned based only on your drawings.

b. Draw the d-orbital slitting diagrams of the red and violet complexes such that the relative energies of the orbitals in the two complexes can be compared.

c. Wse your orbital diagrams to show were the d electroms reside in each complex. Explain your electron configurations.

d. describe an experiment that you could do to test whether your predicted electron configurations are reasonable. Show what the results of this experiment would be for the d electron configureation that you showed in part c

In: Chemistry

) Computers in some vehicles calculate various quantities related to performance.  One of these is the fuel...

  1. ) Computers in some vehicles calculate various quantities related to performance.  One of these is the fuel efficiency, or gas mileage, usually expressed as miles per gallon (mpg).  For one vehicle equipped in this way, the car was set to 60 miles per hour by cruise control, and the mpg were recorded at random times.  Here are the mpg values from the experiment:

37.2     21.0     17.4     24.9     27.0     36.9     38.8     35.3     32.3     23.9

19.0     26.1     25.8     41.1     34.4     32.5     25.3     26.5     28.2     22.1

The vehicle sticker information for the vehicle states a highway average of 27 mpg.  Perform a hypothesis test at 5% significance level to determine if the results of this experiment are consistent with the vehicle sticker.

  1. (30 points) Give the hypotheses, test statistic, rejection region, p-value, decision, and interpretation.
  2. (5 points) What would a Type II error be in this situation?

In: Statistics and Probability

1. Define the ff: A. Heat- B. Heat capacity- 2. Why is it desirable to have...

1. Define the ff:
A. Heat-

B. Heat capacity-

2. Why is it desirable to have the water a few degrees colder than room temperature when the initial temperature is taken?

3. Why is the mass of the outer shell of the calorimeter and the insulating ring not included in taking data for Calorimetry?

6. Why should the hot metal be dry before it is introduced into the cold water? 837 calories of heat are required to heat 100.00 grams of copper from 0.0 C to 100.0 C. What is the specific heat of copper?

***Determining specific heat through insulating through coffee cup. Aluminum is heated and then immediately put in a thermal cup containing water.. Shaked.. then Final Temperature is determined.

4. What does this experiment show about the specific heat of water?

5. How does the conductivity of the metal used in this experiment affect the accuracy of the results?

In: Physics

*MiniTab Is Required for this question** Suppose that a precise measuring device for new hair growth...

*MiniTab Is Required for this question** Suppose that a precise measuring device for new hair growth has been developed and is used in the experiment described in exercise 1922. The percentages of new hair growth for the 30 pairs of men involved in the experiment were recorded. Do these data allow the chemist to conclude that drug B is more effective?

Drug A   Drug B
3.5   7.1
2.4   6.6
4.2   4.2
1.1   1.0
2.9   2.7
2.8   4.1
5.6   8.3
4.8   8.8
0.8   0.8
3.6   3.4
2.0   1.8
5.6   6.9
4.3   6.8
7.1   7.9
3.8   6.2
3.6   3.5
4.2   7.3
2.8   2.7
6.1   9.5
3.7   6.2
4.0   6.7
3.5   6.8
3.1   3.0
6.0   9.0
5.3   8.4
2.6   4.1
4.8   4.8
2.2   1.8
4.2   5.6
0.8   2.2

In: Statistics and Probability

We consider the experiment of picking a point at random from the interval (0, 1). The...

We consider the experiment of picking a point at random from the interval (0, 1). The sample space for this experiment is the interval (0, 1). We consider three sequences of events in this sample space En = ( 1 n , 1) Fn = (1 − 1 n , 1), Gn = ( 1 2 − 1 2n , 1 − 1 2n ), n positive integer. (a) Is (En) ∞ n=1 increasing, decreasing, both, or neither? (b) Is limn→∞ En defined? If so, what is it (express your answer in interval notation). (c) Is (Fn) ∞ n=1 increasing, decreasing, both, or neither? (d) Is limn→∞ Fn defined? If so, what is it (express your answer in interval notation). (e) Is (Gn) ∞ n=1 increasing, decreasing, both, or neither? (f) Is limn→∞ Gn defined? If so, what is it (express your answer in interval notation).

In: Statistics and Probability

Social Research Methods: Stanford Prison Experiment 1. What is the independent and the dependent variable in...

Social Research Methods: Stanford Prison Experiment

1. What is the independent and the dependent variable in the study?

2. How might you ope rationalizing that hold comes of Interest?

3. Who involved in the experiment had experimental knowledge?

4. What incentives did participants to participate in this study?

5. Was the sample result in generalizable? - Why or why not?

6. List all of the parts of the study that you found questionable or unethical?

7. What were the research ethics that were violated? How would you participants NOT protected from harm?

8. Qualitative or quantitative- How Could You conduct a research study in a different format?

9. How can you go about researching this topic (ex. non-experimental format)?

10. Is this research study biased?

11. What are some key points about the Stanford prison research study?

In: Psychology

Determination of an Equilibrium Constant 1.    What is meant by a reversible reaction? 2.   True...

Determination of an Equilibrium Constant

1.    What is meant by a reversible reaction?


2.   True or False :       The numerical value of the equilibrium constant for                        a given reaction only changes if the temperature
                   changes.

3.   Which component of the reaction mixture was it that was titrated with
   sodium hydroxide?

   A.   Acetic acid           B.   Isopropyl alcohol

   C.   Water               D.   Phenolphthalein

4.   Why was it necessary to wrap your rubber stopper in plastic wrap?


5.   Why was it necessary to titrate a blank sample solution, that is, a sample
   of distilled water which contain only sulfuric acid?


6.   List two advantages of using a buret for measuring reaction volumes as
opposed to maybe a graduated cylinder. (Precision and accuracy are not exceptable answers)

7.   What is a catalyst and how and why was a catalyst needed in this
   experiment?

8.   When would you want to use a pipet instead of a buret in an experiment?

In: Chemistry

1. A 2.168 gram sample of an organic compound containing C, H and O is analyzed...

1. A 2.168 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 5.607 grams of CO2 and 1.148 grams of H2O are produced. In a separate experiment, the molar mass is found to be 136.2 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

2.A 6.210 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 10.34 grams of CO2 and 3.388 grams of H2O are produced.

In a separate experiment, the molar mass is found to be 132.1 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

3.A 0.5079 g sample of a pure soluble bromide compound is dissolved in water, and all of the bromide ion is precipitated as AgBr by the addition of an excess of silver nitrate. The mass of the resulting AgBr is found to be 0.9007 g.

What is the mass percentage of bromine in the original compound?

In: Chemistry