The perceived pitch of a sound depends on ________________.

Ovoviviparous species are distinguished by what trait?

Put the steps of contraction of the heart in the correct order

I. Contraction of the ventricles

II. Signal transmitted from the SA node

III. Contraction of the atria

IV. Delay at the AV node

What is the correct order of processes involving the movement of oxygen from the environment to mitochondria in vertebrates?

Diarrhea occurs when inadequate water absorption occurs from the digestive system. Which region of the digestive tract is most greatly affected in patients with diarrhea?

Innate immunity __________________________.

Sharks are UNLIKE most ocean fishes in what way(s)?

i. The concentration of Na⁺, K⁺ and Cl^- ions in shark tissues is the same as the concentration of these ions in seawater.

ii. Sharks are isotonic to seawater

iii. Sharks have cells specialized to secrete salts

The ampullae of Lorenzini in sharks are used for ________________.

What is the partial pressure of oxygen at an atmospheric pressure of 600 mm Hg?

What can the mouthparts of an animal tell you about its diet?  

i. Mouthparts provide clues about the type of digestion that goes on in the stomach

ii. Mouthparts provide clues about the specific foods an animal pursues.

iii Mouthparts provide clues about the rate of nutrient absorption.

Which of the four terms below is correctly defined by the associated phrase?

I. CD4 T Cell: a leucocyte whose primary job is to help in the activation of other leucocytes

II. HISTAMINE: a chemical messenger in the immune response whose primary job is to dilate blood vessels near the wound site, allowing for easier recruitment of other immunce cells

III. LYSOZYME: an enzyme secreted by the eyes that acts as an antibiotic by digesting bacterial cell walls.

IV. EPITOPE: a specific region where a particular antigen binds to an antibody, B-cell receptor, or T-cell receptor.

Sperm cells mature and are stored within human males in the _______________

Which of the following connective tissues is INCORRECTLY matched?

For a neuron at rest with a membrane potential of -65 mV, an increase in the movement of potassium inos out of that neuron's cytoplasm would result in the ____________________.

What term describes the mode of asexual reproduction in which offspring develop from unfertilized eggs?

The vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart are the ___________.

Which statement best describes the difference in responses of effector B cells (plasma cells) and cytotoxic T cells?

Which of the following molecules is/are required to break down fats?

Neurotransmitters released from the vagus nerve cause a decrease in heart rate. To which part of the vertebrate nervous system would the vagus nerve belong?

Corneal eye surgery is now routinely performed to change the shape of the cornea and improve vision. This surgery is beneficial because ________________.

Which of the following variables can have an effect on the speed of an action potential once it has been initiated?

Which of the following processes is NOT controlled by hormones?

2C₄H₁₀ (g) + 13O₂ (g)  →  8CO₂ (g)+ 10H₂O (g)

ΔH_rxn = Σ(bond energy of bonds broken) − Σ(bond energy of bonds formed)Eqn. 1

ΔH_rxn = Σ(ΔH_f, products) − Σ(ΔH_f, reactants)Eqn. 2

Look up all the bond enthalpies for the reactants and products. Calculate the sum of the bond energies (in kJ) in all of the reactants and in all of the products, paying attention to the number of bonds in the molecules and the stoichiometric coefficients for each molecule from the balanced chemical equation. (Enter unrounded values.)

Σ(bond energy of bonds broken)= ----------- kJ

Σ(bond energy of bonds formed)= ----------- kJ

Calculate the enthalpy of combustion, using Eqn. 1. Express the final answer as kJ/mol of butane. Pay attention to the stoichiometric coefficient of the fuel in the balanced chemical equation. (Enter an unrounded value.)

------- kJ/mole of butane

b) Use enthalpies of formation to calculate the enthalpy of combustion for butane with the same balanced reaction written in (a)(i).

(i) Look up all the enthalpies of formation for the reactants and products—make sure you use the value for the correct phase of the species. Calculate the sum of the enthalpies of formation (in kJ) for all of the reactants and all of the products, paying attention to the stoichiometric coefficients for each molecule from the balanced equation. (Enter unrounded values.)

Σ(ΔH_f, reactants)= kJΣ(ΔH_f, products)= ______kJ

(ii) Calculate the enthalpy of combustion, using Eqn. 2. Express the final answer as kJ/mol of butane. Pay attention to the stoichiometric coefficient of the fuel in the balanced chemical equation. (Enter an unrounded value.)

------------ kJ/mol of butane

Part B

The amount of heat that can be obtained from a reaction depends on the amount of reactant used or the amount of product made. The quantity ΔH_rxn in kJ/mol can be used like any other stoichiometric coefficient to relate the amount of heat to the moles of reactant or product used to carry out a reaction. The amount of enthalpy available per kg of fuel is called the energy density of the fuel, and is commonly used to compare the energy content of different sources of energy.

Using your answers from part A (a), answer the following questions.

(a) For butane, C₄H₁₀, calculate the energy released for the combustion of 1 kg of fuel. Express your answer in the units MJ/kg and as the absolute value of the energy. (1 MJ = 1000 kJ.) (Enter an unrounded value.)

--------------- MJ/kg butane

(b) Calculate the kg of carbon dioxide produced per kilogram of fuel for butane. Express your answer as kg CO₂/kg. (Enter an unrounded value.)

--------------- kg CO₂/kg butane

Part C

Diesel is a mixture of hydrocarbons with between 8 and 21 carbon atoms. The average empirical formula for the mixture that is diesel corresponds to C₁₂H₂₃. Biodiesel is a fatty acid ester that can be synthesized from the fatty acids (stearic acid or linoleic acid) in plants or from used cooking oil, such as canola oil or soybean oil. A typical component of biodiesel has the formula C₁₉H₃₆O₂.

(a) Write and balance the combustion reaction for diesel (C₁₂H₂₃) and for biodiesel (C₁₉H₃₆O₂). (Hint: Recall how combustion engines work before answering this question. Include states-of-matter under the given conditions in your answer. Use the lowest possible whole number coefficients.)

Dissel

4C₁₂H₂₃(g) + 71O₂(g) → 48CO₂(g)+46H₂O(g)

Biodiesel

C₁₉H₃₆O₂(g) + 27O₂(g)  → 19CO₂(g)+18H₂O(g)

(b) Calculate the kg of carbon dioxide emitted per kg of diesel and biodiesel. (Enter unrounded values.)

(i) Diesel

________ kg CO₂ / kg diesel

(ii) Biodiesel

________ kg CO₂ / kg biodiesel

Please solve and show work for the questions with the blanks.

Item 1

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 2

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 3

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 4

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 5

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 6

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 7

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 8

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 9

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

Hints

Item 10

In the case below, the original source material is given along with a sample of student work. Determine the type of plagiarism by clicking the appropriate radio button.

Which of the following is true for the Student Version above?

Word-for-Word plagiarism

Paraphrasing plagiarism

This is not plagiarism

The Case of the Man with the Weak Arm

Albert, a seventy-two year old African-American man, is brought into the emergency room by his daughter. Approximately 45 minutes before arriving, Albert dropped his book when his right arm and hand "fell asleep". When he tried to rise, he noticed his right leg was weak and he needed to hold onto the couch to stand up. He had a difficult time talking because the right side of his face and mouth were "numb" and his tongue felt "thick".

In obtaining a medical and family history it was noted that Albert has smoked at least 1 pack of cigarettes per day for the last 40 years and both of his parents died of strokes when they were in their mid sixties. He has previously been diagnosed with both essential hypertension and hypercholesterolemia. He admits to "skipping" his antihypertensive medication because of the unpleasant side effects it causes. Albert notes that he has been experiencing short (5 – 10 minutes) incidences of weakness on his right side, but he attributed this to the position he was in, causing his arm or leg to "fall asleep". He has also noticed that he is having mild headaches, but recently, these have been less frequent.

Physical examination indicated that Albert was alert and anxious, but his speech was slurred. He was afebrile, had a respiratory rate of 16 breaths per minute, a regular heart rate of 86 beats per minute and a blood pressure of 190/120 mm Hg. Albert had no irregular heart sounds and presented with slight bilateral edema of the ankles. Examination of the nervous system indicated intact tactile sensory function, decreased strength of the right extremities, a diminished gag reflex, diminished right deep tendon reflexes, and right facial droop. Based on these symptoms the emergency room physician suspected a thrombolytic stroke and immediately ordered a head CT scan and various blood tests. The physician also discussed the relative benefits and risks of various treatments and courses of action with Albert and his daughter. Albert was given aspirin for possible thrombosis and a b-blocking antihypertensive and his condition was monitored closely while awaiting the test results.

Results of the laboratory tests indicated hyperglycemia, hypercholesterolemia, normal blood clotting times and platelet numbers. In addition, the head CT was normal. Despite the treatments initiated, Albert’s condition continued to deteriorate. While his blood pressure decreased to 170/84 mm Hg, his heart rate was elevated to 100 beats per minute and became irregular. He continued to demonstrate decreased sensation on his right side, slight dysarthria, and further decreases in strength in both right extremities. Based on these results, treatment with plasminogen activator was initiated and an electrocardiogram (ECG) was conducted. The results of the ECG indicated atrial flutter.

After 5 hours, Albert’s condition improved to the point that the hemiparesis and dysarthria were at baseline levels and his blood pressure was stabilized at 156/70 mm Hg. Further treatments were then initiated to stabilize Albert’s atrial flutter and hypertension. He was given digoxin, which stabilized the atrial flutter and heart rate at 80 beats per minute and an angiotenisn converting enzyme (ACE) inhibitor was prescribed for the hypertension. An echocardiogram indicated bilateral stenosis of the carotid arteries. Antithrombolytic therapy (325 mg aspirin/day) was also prescribed. Albert was encouraged to stop smoking and to modify his diet and was discharged.

Answer the following questions about this case using the medical terms learned this week.

What symptoms suggested that Albert was having a stroke? What risk factors did Albert present with, which would support the symptoms observed? Why is Albert’s treatment include aspirin?

1. Label Analysis—Lipids  

Instructions: Use the label for a frozen meal below to answer the questions that follow on a separate sheet of paper.

Short answers (do not need to be in complete sentences). Show work for calculations.  

(20 points.)

All informations are inside. It seems like you can't solve this. Are you really a tutor?

QUESTION 22

Kelly, a new employee, learns her company provides a group insurance plan that she can enroll in. Her friend, Michael, suggests that Kelly would be able to save money if she chooses to purchase an individual insurance plan over the company's group insurance plan. Which of the following weakens Michael's argument?

QUESTION 18

John is the head of the insurance claims department. John works for longer hours than his subordinates, however, he is not paid overtime for working more than 40 hours per week. Under the FLSA, which of the following will justify the organization's decision not to give John overtime pay?

2 points   

QUESTION 19

John is the owner of the restaurant, The Round. He decides to increase employee motivation by introducing benefit packages. However, Nina, the manager, suggests that employees will be more motivated if John increases their actual wages. Which of the following statements, if true, strengthens Nina's argument?

Using the "mammals" dataset from the "MASS" library in R:

body brain
Arctic fox 3.385 44.50
Owl monkey 0.480 15.50
Mountain beaver 1.350 8.10
Cow 465.000 423.00
Grey wolf 36.330 119.50
Goat 27.660 115.00
Roe deer 14.830 98.20
Guinea pig 1.040 5.50
Verbet 4.190 58.00
Chinchilla 0.425 6.40
Ground squirrel 0.101 4.00
Arctic ground squirrel 0.920 5.70
African giant pouched rat 1.000 6.60
Lesser short-tailed shrew 0.005 0.14
Star-nosed mole 0.060 1.00
Nine-banded armadillo 3.500 10.80
Tree hyrax 2.000 12.30
N.A. opossum 1.700 6.30
Asian elephant 2547.000 4603.00
Big brown bat 0.023 0.30
Donkey 187.100 419.00
Horse 521.000 655.00
European hedgehog 0.785 3.50
Patas monkey 10.000 115.00
Cat 3.300 25.60
Galago 0.200 5.00
Genet 1.410 17.50
Giraffe 529.000 680.00
Gorilla 207.000 406.00
Grey seal 85.000 325.00
Rock hyrax-a 0.750 12.30
Human 62.000 1320.00
African elephant 6654.000 5712.00
Water opossum 3.500 3.90
Rhesus monkey 6.800 179.00
Kangaroo 35.000 56.00
Yellow-bellied marmot 4.050 17.00
Golden hamster 0.120 1.00
Mouse 0.023 0.40
Little brown bat 0.010 0.25
Slow loris 1.400 12.50
Okapi 250.000 490.00
Rabbit 2.500 12.10
Sheep 55.500 175.00
Jaguar 100.000 157.00
Chimpanzee 52.160 440.00
Baboon 10.550 179.50
Desert hedgehog 0.550 2.40
Giant armadillo 60.000 81.00
Rock hyrax-b 3.600 21.00
Raccoon 4.288 39.20
Rat 0.280 1.90
E. American mole 0.075 1.20
Mole rat 0.122 3.00
Musk shrew 0.048 0.33
Pig 192.000 180.00
Echidna 3.000 25.00
Brazilian tapir 160.000 169.00
Tenrec 0.900 2.60
Phalanger 1.620 11.40
Tree shrew 0.104 2.50
Red fox 4.235 50.40

The dataset needs to be log transformed to meet regression assumptions. Use predict() to calculate the confidence interval and regression line for this regression and graph it on both the log/log plot and on the un-transformed data (this will require that you back-transform the coordinates for the line and confidence intervals).

Billingham Packaging is considering expanding its production capacity by purchasing a new​ machine, the​ XC-750. The cost of the​ XC-750 is $2.72 million.​ Unfortunately, installing this machine will take several months and will partially disrupt production. The firm has just completed a $48,000 feasibility study to analyze the decision to buy the​ XC-750, resulting in the following​ estimates: • ​

Marketing: Once the​ XC-750 is operating next​ year, the extra capacity is expected to generate $10.2 million per year in additional​ sales, which will continue for the​ ten-year life of the machine. • ​

Operations: The disruption caused by the installation will decrease sales by $4.93 million this year. As with​ Billingham?s existing​ products, the cost of goods for the products produced by the​ XC-750 is expected to be 74% of their sale price. The increased production will also require increased inventory on hand of $1.1 million during the life of the project. The increased production will require additional inventory of $1.1 ​million, to be added in year 0 and depleted in year 10. •

Human​ Resources: The expansion will require additional sales and administrative personnel at a cost of $2.06 million per year. • ​Accounting: The​ XC-750 will be depreciated via the​ straight-line method in years​ 1?10. Receivables are expected to be  14% of revenues and payables to be 10% of the cost of goods sold.​ Billingham?s marginal corporate tax rate is 15%.

a. Determine the incremental earnings from the purchase of the​ XC-750.

b. Determine the free cash flow from the purchase of the​ XC-750.

c. If the appropriate cost of capital for the expansion is 10.3%​, compute the NPV of the purchase.

d. While the expected new sales will be $10.2 million per year from the​ expansion, estimates range from $8.3 million to $12.1 million. What is the NPV in the worst​ case? In the best​ case?

e. What is the​ break-even level of new sales from the​ expansion? What is the​ break-even level for the cost of goods​ sold?

f. Billingham could instead purchase the​ XC-900, which offers even greater capacity. The cost of the​ XC-900 is $4 million. The extra capacity would not be useful in the first two years of​ operation, but would allow for additional sales in years​ 3-10. What level of additional sales​ (above the $10.2 million expected for the​ XC-750) per year in those years would justify purchasing the larger​ machine?