The temp and number density in a typical Planetary nebula are 3,500 K and 2.3*10⁹ m^-3

a. Calculate the pressure in Pa in a Planetary nebula

b. Calculate the Mean free path in the nebula if the particles have a diameter of 0.20 nm

c. calculate the mean speed of a hydrogen atom under the nebula conditions above

d. Calculate the collision density for a hydrogen atom in the nebula.

I calculated these solutions myself but I have doubt in my answers, I'd appreciate some confirmation.

a. The U.S. average yield of corn is 153 bushels/acre.

Does this agree with the 2009 international average as

defined by the United Nation

Two point charges Q₁ = +4.00 nC and

Q₂ = −2.70 nC

are separated by 55.0 cm.

(a) What is the electric potential at a point midway between the charges?
V

(b) What is the potential energy of the pair of charges?
J

What is the significance of the algebraic sign of your answer?

Positive work must be done to separate the charges.Negative work must be done to separate the charges.  

In a experiment we did with electromagnets, we used only one battery with a certain voltage and didn't change it out. So did the current stay constant if we used the same battery because the voltage stayed constant????

The purpose of the experiment was to manipulate the number of winds to increase the magnetic field strength.

Thanks

  A 63.0-? resistor is connected in parallel with a 115.0-? resistor. This parallel group is connected in series with a 17.0-? resistor. The total combination is connected across a 15.0-V battery.

(a) Find the current in the 115.0-? resistor.
A

(b) Find the power dissipated in the 115.0-? resistor.
W

One of the key ways a firm may be a monopoly is through patent protection. Perhaps many of you heard of the infamous case of Martin Shkreli's price hike of a drug called Daraprim from $12.50 to $750 almost overnight (Links to an external site.). Specifically answer this prompt: Should there be a price ceiling placed on patented products? Why or why not? If so, how exactly would you set the price ceiling? Consider the incentives that such a policy may have in the short and long term.

A yes/no/maybe answer to the question with an explanation of your reasoning.Include a detailed and accurate application of one or more of the concepts: patent, legal barriers to entry, economic profit in the short run and long run.

A portfolio has 65 shares of Stock A that sell for $40 per share and 130 shares of Stock B that sell for $31 per share. What is the portfolio weight of Stock A? What is the portfolio weight of Stock B?

Use the following for this section: Na = 23.0 g/mol, Mg = 24.3 g/mol, Cl = 35.5 g/mo

1. Calculate the amount of sodium chloride required to make 200 mL of a 0.100 M sodium chloride solution. This is solution 1.
2. Calculate the amount of magnesium chloride required to make 200 mL of a 0.100 M magnesium chloride solution. This is solution 2.
3. Solution 3 is made by mixing 50 mL solution 1 and 50 mL solution 2. Calculate the chloride ion concentration in the resulting solution.
4. Solution 4 is made by mixing 50 mL solution 1 and 50 mL of a 0.20 M silver nitrate solution. Calculate the resulting sodium ion and chloride ion concentrations.

Asset management ratios are used to measure how effectively a firm manages its assets, by relating the amount a firm has invested in a particular type of asset (or group of assets) to the amount of revenues the asset is generating. Examples of asset management ratios include the average collection period (also called the days sales outstanding ratio), the inventory turnover ratio, the fixed asset turnover ratio, and the total asset turnover ratio.

Consider the following case:

Monroe Manufacturing has a quick ratio of 2.00x, $34,875 in cash, $19,375 in accounts receivable, some inventory, total current assets of $77,500, and total current liabilities of $27,125. The company reported annual sales of $800,000 in the most recent annual report.

Over the past year, how often did Monroe Manufacturing sell and replace its inventory?

2.86x

37.85x

34.41x

8.01x

The inventory turnover ratio across companies in the manufacturing industry is 37.851x. Based on this information, which of the following statements is true for Monroe Manufacturing?

Monroe Manufacturing is holding less inventory per dollar of sales compared with the industry average.

Monroe Manufacturing is holding more inventory per dollar of sales compared with the industry average.

You are analyzing two companies that manufacture electronic toys—Like Games Inc. and Our Play Inc. Like Games was launched eight years ago, whereas Our Play is a relatively new company that has been in operation for only the past two years. However, both companies have an equal market share with sales of $800,000 each. You’ve collected company data to compare Like Games and Our Play. Last year, the average sales for all industry competitors was $2,040,000. As an analyst, you want to make comments on the expected performance of these two companies in the coming year. You’ve collected data from the companies’ financial statements. This information is listed as follows: (Note: Assume there are 365 days in a year.)

Data Collected (in dollars)

Using this information, complete the following statements to include in your analysis.

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Integrativelong dashInvestment decision Holliday Manufacturing is considering the replacement of an existing machine. The new machine costs $ 1.20 million and requires installation costs of $ 150 comma 000. The existing machine can be sold currently for $ 185 comma 000 before taxes. It is 2 years old, cost $ 800 comma 000 new, and has a $ 384 comma 000 book value and a remaining useful life of 5 years. It was being depreciated under MACRS using a 5-year recovery period and therefore has the final 4 years of depreciation remaining. If it is held for 5 more years, the machine's market value at the end of year 5 will be $ 0. Over its 5-year life, the new machine should reduce operating costs by $ 350 comma 000 per year. The new machine will be depreciated under MACRS using a 5-year recovery period. The new machine can be sold for $ 200 comma 000 net of removal and cleanup costs at the end of 5 years. An increased investment in net working capital of $ 25 comma 000 will be needed to support operations if the new machine is acquired. Assume that the firm has adequate operating income against which to deduct any loss experienced on the sale of the existing machine. The firm has a 9.0 % cost of capital and is subject to a 40 % tax rate. a. Develop the relevant cash flows needed to analyze the proposed replacement. b. Determine the net present value (NPV) of the proposal. c. Determine the internal rate of return (IRR) of the proposal. d. Make a recommendation to accept or reject the replacement proposal, and justify your answer. e. What is the highest cost of capital that the firm could have and still accept the proposal?

8a.  Until fairly recently, the FED did not pay interest on bank reserves but a few years ago the FED changed its policy and currently pays interest on bank reserves.  Under its original policy, for every $100 in checkable deposits how much did banks sacrifice in lost interest income due to reserve requirements if a bank charged 11% on their loans to the public when the required reserve ratio was set at 8%?  

8b.  For every $100 in checkable deposits, how much would a bank lose in interest income (opportunity cost) due to reserve requirements if banks charged 16% on their loans to the public when the required reserve ratio was 15%?  Finally, if you were an investor holding shares of common stock in a commercial bank, how are bank profits (and therefore your returns) affected by changes in the required reserve ratio?  Similarly, how are bank profits affected by changes in the market interest rates which your bank charges on loans to the public?  

A plant that operates with Rankine cycle, has the following conditions: P1 = P2 = 10,000 kPa, T2 = 600 ° C, P3 = P4 = 10 kPa, η turbine = 0.8 and η pump = 0.75, power produced in the turbine = 80,000 kW. Calculate: inlet heat, outlet heat, steam flow, and thermal efficiency.

Assume an economy is in long-run macroeconomic equilibrium. The stock market suddenly declines significantly.

- What curve is affected and which way would it shift?

- Explain how the economy will “self-correct” and the reasons why?

- What ‘gap’ is created by the shift in the curve? (recessionary or inflationary gap)

- What would be the appropriate monetary and fiscal policy response be to the station?

Compute the mass of  ₉₂U²³⁵ + ₀n^1.

^{also known as Uranium -235}

^{please type out all steps.}

Briefly explain the reasons why the unit price of an unlisted managed fund is likely to change on a regular basis. In addressing this question reference should be made to the various asset classes, their returns over time, how their returns impact unit price of the fund and also how cash distributions from the fund affect value and unit price of the fund.