Which of the following redox reactions do you expect to occur spontaneously in the forward direction?

Calculate the nuclear binding energy (in J) and the binding energy per nucleon for the following isotope:

₅₃¹²⁷ I (126.9004 amu)

Nuclear binding energy = __________ x 10 ^__________ J

Binding energy per nucleon = _________ x 10 ^_________ J/nucleon

A solution is made by dissolving 0.636 mol of nonelectrolyte solute in 841 g of benzene. Calculate the freezing point, T_f and boiling point T_b of the solution.

A randomized controlled study was done (Lewis et al, Annals of Internal Medicine, 1998) to see whether the cholesterol lowering drug pravastatin can lower the risk of coronary disease in older patients after myocardial infarction.

Results

Major coronary events occurred in 28.1% of placebo recipients and 19.7% of pravastatin recipients (difference, 9.0 percentage points [95% CI, 4 to 13 percentage points]; relative risk reduction, 32%; P < 0.001). Coronary death occurred in 10.3% of the placebo group and in 5.8% of the pravastatin group (difference, 4.6 percentage points [CI, 1.9 to 6.5 percentage points]; relative risk reduction, 45%; P = 0.004). Stroke incidence was 7.3% in the placebo group and 4.5% in the pravastatin group (absolute reduction, 2.9 percentage points [CI, 0.3 to 4.5 percentage points]; relative reduction, 40%; P = 0.03).

All of the following statements regarding interpreting the numbers are true EXCEPT one. Which statement is NOT accurate?:

a. If we repeated the study on a similar sample of subjects, we would observe a difference of 9 percentage points or greater between pravastatin and placebo less than 1 in 1000 times if there were actually no difference between the groups.

b. We are 95% confident that the true reduction in coronary events from pravastatin compared with placebo is is between 4 and 13 percentage points.

c. Subjects receiving pravastatin had 55% of the risk of coronary death as the placebo group.

d. We are more than 95% confident that pravastatin reduces the risk of coronary events, coronary death, and stroke.

e. We are 97% confident that pravastatin reduced the risk of stroke by 2.9 percentage points compared with placebo.

2. Explain these Bioethical Issues ( Minimum of 5 Sentences each)

a. Abortion

b. Euthanasia

c. Female Genital Mutilation

d. Contraception

e. Stem Cell, Cloning and Genetically Modified Organisms (GMOs)

f. Organ and Blood Donation

Marketing Promotion Campaign

Thinking as a Brand Manager, to create a creative brief for a campaign to launch a new product of our choice to give it to creative agency.

7. In an American Animal Hospital Association survey, 37% of respondents stated that they talked to their pets on the telephone. A veterinarian found this result hard to believe, so he randomly selected 150 pet owners and discovered that 54 of them spoke to their pet on the telephone. At 0.05 significant level, test the result stated by the American Animal Hospital Association.

8. With a random sample 1026 adult Americans, 534 stated the amount of federal tax they have to pay is too high. Use 0.01 significant level to test the claim that at least half of Americans say federal tax is too high.

Calculate the standard Gibbs free energy and equilibrium constant for the oxidation of Fe2+ to Fe3+ by Cr2O72- (a common redox titration method to determine iron.) The half-cell equations that you will need are balanced, on the table of standard reduction potentials.

The Social Security System in the US has been successful so far in terms of reducing poverty among the retirees. However, there is concern that the system may become unsustainable in future. There is a proposal to change the system from its current setup of ‘pay-as-you-go’ to a ‘fully-funded system’, wherein the latter case workers contributions will be invested in financial assets (aka in stocks, bonds etc., managed by private fund managers) and workers will be repaid back with the principal and interest when they retire.

Discuss the potential benefits and costs of the proposed solution relative to the existing system.

A mixture initially contains A, B, and C in the following concentrations: [A] = 0.300 M , [B] = 1.40 M , and [C] = 0.700 M . The following reaction occurs and equilibrium is established: A+2B⇌C At equilibrium, [A] = 0.140 M and [C] = 0.860 M . Calculate the value of the equilibrium constant, Kc.

Hartford Research issues bonds dated January 1, 2017, that pay interest semiannually on June 30 and December 31. The bonds have a $40,000 par value and an annual contract rate of 10%, and they mature in 10 years. (Table B.1, Table B.2, Table B.3, and Table B.4) (Use appropriate factor(s) from the tables provided. Round all table values to 4 decimal places, and use the rounded table values in calculations. Round your 'Present Value' answers to the nearest whole dollar.) Required: Consider each of the following three separate situations. 1. The market rate at the date of issuance is 8%. (a) Complete the below table to determine the bonds' issue price on January 1, 2017. (b) Prepare the journal entry to record their issuance. 2. The market rate at the date of issuance is 10%. (a) Complete the below table to determine the bonds' issue price on January 1, 2017. (b) Prepare the journal entry to record their issuance. 3. The market rate at the date of issuance is 12%. (a) Complete the below table to determine the bonds' issue price on January 1, 2017. (b) Prepare the journal entry to record their issuance.

Describe the physics and draw an illustration of charge polarization.

QUESTION 3

a) A steam power plant operates on an ideal reheat-regenerative Rankine cycle. Steam

enters the high-pressure turbine (HPT) at a pressure of 10 MPa and temperature of

550oC. The steam expands through the HPT stage to a pressure of 0.6 MPa. Some of

the steam at the end of the expansion process in HPT is extracted for a regeneration

process in a closed-type feedwater heater. The steam leaves the heater as a saturated

liquid and then is throttled to the condenser pressure of 10 kPa. The remaining steam at

the end of HPT is reheated at constant pressure of 0.6 MPa to a temperature of 500oC

before entering the low-pressure turbine (LPT). The steam finally expands through the

LPT to the condenser pressure of 10 kPa. The water leaves the condenser as a saturated

liquid. The feedwater in the heater is preheated to saturation temperature of the reheat

pressure. The plant produces a net power output of 115 MW.

i. Show the cycle on a temperature-entropy (T-s) diagram.

ii. Determine the mass fraction of the extracted steam.

iii. Calculate the mass flow rate of the steam, kg/s.

iv. Compute the thermal efficiency, %.

A physics student who is also a pilot is preparing to fly from the Daydon airport home to Kalona Iowa which is due west. Her plane flies with an airspeed (its speed relative to the air) of 106 knots. There is a strong wind blowing at 25 knots coming from the Northwest.

a. What heading should she fly? In other words, what direction should she aim the plane as she flies if she wants to go directly to Kalona? (In degrees North of due West.)

b. What will her ground speed be?