#2.  Explain the gold standard and why the U.S. stopped using it.   Your answer must a) identify at least one advantage and disadvantage to the gold standard, b) talk about convertibility of dollars to gold, and c) identify at least one key event and year of a change relating to the use of the gold standard. HINTS: There were several events that weakened how the gold standard was used before It was totally abandoned. Other hints: Bretton Woods and foreign exchange)

A straight, vertical wire carries a current of 1.27 A downward in a region between the poles of a large superconducting electromagnet, where the magnetic field has a magnitude of B = 0.567 T and is horizontal.

Part A

What is the magnitude of the magnetic force on a section of the wire with a length of 1.00 cm that is in this uniform magnetic field, if the magnetic field direction is east? (Unit N)

Part B

What is the direction of the magnetic force on a section of the wire with a length of 1.00 that is in this uniform magnetic field, if the magnetic field direction is east?

How much force could you exert on a large crate if you wanted to get it moving? One thing the answer depends on is whether you can keep your footing.

a) Imagine someone on level ground, pushing horizontally against a crate, with enough effort that their feet are about to start slipping. Nevertheless, the crate hasn't started moving. What type of force is the crate exerting on the person pushing on it, and how does the magnitude of this force compare to the magnitude of the force the pusher is exerting on the crate? Explain.

b) Draw a FBD of the pusher in this situation.. Use standard symbols for all forces, include labeled axes, and include information about your velocity and acceleration. Only include forces that act on the person pushing the crate.

c) Choose a coefficient of static friction between the pusher's feet (or shoes) and the floor (in the range of 0.50 to 0.70). Let's say the pusher's mass is 92 kg. Use N2L in conjunction with your FBD to calculate the force exerted on the pusher by the crate when their feet are about to start slipping.

d) Suppose you tried this yourself – let's assume you're just as strong as the pusher, but you weigh less. Would you be able to exert as much force on the crate as you just calculated? Why or why not?

e) The pusher, pushing as hard as possible, manages to make the crate start sliding, and keeps pushing. Draw a FBD for the sliding crate.

f) Choose a coefficient of kinetic friction between the crate and the floor (between 0.30 and 0.45). Calculate the minimum time, starting from rest, it would take to push the crate 3.5 m across the floor, if its mass is 71 kg. Hint: you'll need N2L and your second FBD to start solving this.

According to Gallup, 86% of incoming freshman said that getting a better job represents a critical factor in their decision to enroll in college. Consider a sample of 150 incoming freshman selected at random. Round your answers to 3 decimal places as needed.

a. Is the sampling distribution model for the sample proportion likely to be Normal? (Yes or No). Explain by stating the conditions and assumptions which must be met for the Normal model in this particular context.

b. Give the values for the mean and standard deviation of the sampling distribution model of p hat for this situation where n = 150. (Clearly write down the notations and formulas used)

Mean:                         Standard deviation:

c. Use MINITAB to create a graph of the sampling distribution model for this situation.

d. Determine the z-score associated with 134 freshman in a sample of 150 saying that getting a better job represents a critical factor in their decision to enroll in college.

i. Give the equation/formula with the values substituted.

ii. Give the value of Z.

e. Determine the probability that fewer than 123 freshmen in a sample of 150 said that getting a better job represents a critical factor in their decision to enroll in college.

f. Use MINITAB to produce the graph showing the curve with the appropriate area shaded to answer #1e. Copy and paste the graph here.

2. A survey of 845 employed people found that 31% are engaged at work. Gallup defines engaged employees as those who are involved in, enthusiastic about, and committed to their work and workplace. Round your answers to 3 decimal places as needed.

a. Use MINITAB to determine the 90% confidence interval for the proportion of employees who are engaged at work. Copy and paste the MINITAB output found in the Session window here.

b. State the formula for 90% confidence interval using appropriate notations.

c. Write the equations for the lower bound and the upper bound of the 90% confident interval with the appropriate values substituted.

Lower bound =

Upper bound =

d. Write the 90% confidence interval for proportion of people engaged at work.   

e. Interpret the meaning of this confidence interval in the context of the problem. Carefully explain what 90% confidence means in this context.

f. Determine the margin of error associated with this confidence interval.

g. What is the value of the standard error of the sample proportion?

h. Would a 95% confidence interval calculated from the same data be wider or narrower?  

You are a second year student in Prestige Open University. The recent pandemic, Covid-19, has forced your university to move lessons online. This change brought about relief to some students but also some challenges to others. As a second year student, you have decided to write a proposal to the dean of the school to highlight the problems faced and suggest some possible solutions.

In your proposal to the dean of the school,
 state the purpose of your proposal;
 suggest two (2) problems that you faced while attending classes online;
 suggest two (2) solutions to overcome those problems; and
 describe the benefits of those suggestions to the students.

Your proposal should be about 600-800 words.

In your opinion, does capital structure matter (e.g. does it affect firm valuation)? Detail your reasoning with concrete examples (using real data) of your firm (the firm you pick to work on throughout the term).

*****Urgent Please !!!! Please answer using ---- RESEARCH QUESTION - ( How has the COVID-2019 pandemic affected mental health among hospital employees? )*****

1. What is your research question?

2. Does your research question meet the FINER criteria? Please explain

3. Provide some background and significance.

4. What is your proposed study design? What is your time frame?

5. What is your justification for your proposed study design.

6. Who is your proposed study population? What are the selection criteria? How are you going to reach your proposed study population? Do you plan on surveying everyone, or take a sample? I take a sample, will it be a random or convenience, or other sampling design? We will go over sampling designs in more detail later, but I'd like you to make an educated guess.

7. Why did you choose this study population, the selection criteria, the sampling design, etc.?

8. What is/are your exposure(s) of interest, and how will you collect information on your exposure variables? Why did you choose this way of measuring?

9. What is/are your outcome(s) of interest, and how are you going to collect information on your outcome variables? Why did you choose this way of measuring?

10. Provide an example of a research hypothesis related to your study.

Do not do sample size calculations or analytic approach.

Think like a scientist and carefully considering the different aspects of your study design.

Case scenario 4: You see a 23-year-old in post-natal ward who has been diagnosed with lactational mastitis. Her breasts are engorged, painful, red and warm to touch.

Explain the pathogenesis of lactational mastitis. Develop a management plan for this patient’s condition. Recommend three (3) strategies to minimize the recurrence of lactational mastitis.

Photosynthesis relies on assemblies of molecules that work in tandem to produce energy from water and light. One set of molecules absorbs light primarily in the red and another absorbs light primarily in the blue. Draw the energy level diagram for each and draw the absorption profile versus photon energy. Explain why green leaves turn yellow in the Fall.

Explain to your non-technical client how the practice of financial risk management is similar to hedging, and how is it different.

State and discuss the reasons why Qantas should hedge and why it shouldn’t hedge its fuel costs.