2015 W&WR needed to replace 2 miles of track.
costs $80,000. using MACRS depric, what would be the depreciation
for
2014
2016
2018
2020
2022
In: Finance
Given the following information:
|
Expected return on Stock A |
.15 (15%) |
|
Standard deviation of return |
0.3 |
|
Expected return on Stock B |
.18 (18%) |
|
Standard deviation of return |
0.4 |
|
Correlation coefficient of the returns on Stock A and Stock B |
0.75 |
a. What are the expected returns and
standard deviations of the following
portfolios?
1. 100 percent of funds invested in Stock A
2. 100 percent of funds invested in Stock B
3. 50 percent of funds invested in each stock?
b. What would be the impact if the correlation coefficient were
-0.42 instead of 0.75?
In: Finance
Given the following information:
Expected return on Stock A .15 (15%)
Standard deviation of return 0.3
Expected return on Stock B .18 (18%)
Standard deviation of return 0.4
Correlation coefficient of the returns on Stock A and Stock B 0.75
a. What are the expected returns and standard deviations of the following portfolios?
1. 100 percent of funds invested in Stock A
2. 100 percent of funds invested in Stock B
3. 50 percent of funds invested in each stock?
b. What would be the impact if the correlation coefficient were -0.42 instead of 0.75?
In: Finance
A piston-cylinder assembly has initially a volume of 0.3 m3 of air at 25 oC. Mass of the air is 1 kg. Weights are put on the piston until the air reaches to 0.1 m3 and 1,000 oC, in which the air undergoes a polytropic process (PVn = const). Assume that heat loss from the cylinder, friction of piston, kinetic and potential effects are negligible. 1) Determine the polytropic constant n. 2) Determine the work transfer in kJ for this process, and discuss its direction. 3) Sketch the process in T-V (temperature-volume) diagram.
In: Mechanical Engineering
In Young’s experiment, monochromatic light of wavelength 600 nm shines on two slits separated by 0.3 mm, producing an interference pattern on a screen that is 2.0 m away. You put a thin sheet of glass (n = 1.5) at the top slit and you observe a dark fringe the central location of the screen. Furthermore, the fourth bright spot on both sides of the central location is missing. (a) Sketch the resulting interference pattern. Precisely state the spacing between bright and dark fringes. Sketch up to and including the second order diffraction minimums. You must show all your numerical work. [4] (b) Find the width of the slits. [2] (c) Find the minimum thickness of the glass such that the central location of the screen is dark. [2] (d) Explain if the same pattern would be obtained if two independent sources of light, that is, using two separate lasers (one for each slit) would be used (instead of just one laser illuminating both slits). [2]
In: Physics
A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C and 100 kPa total pressure. Determine
(a) The specific humidity
(b) The relative humidity
(c) The specific enthalpy of the mixture in the tank as (kJ/kg-mixture) (calculate by hand)
(d) The specific enthalpy of the mixture in the tank as (kJ/kg-dry air) (calculate by hand)
(e) Explain (in 1-2 sentences) the difference between the values in c and d – which value agrees with the enthalpy value in the psychrometric chart at this condition?
In: Mechanical Engineering
3) A vortex tube receives 0.3 m3/min of air at 600 kPa and 300 K. The discharge from the cold end of the tube is 0.6 kg/min at 245 K and 100 kPa. The discharge from the hot end is at 325 K and 100 kPa. Determine the irreversibility.
In: Mechanical Engineering
a nurse on pediatric unit is implementing a prescription for dexamethasone solution 0.3 mg/kg now. which of the following additional information should nurse interpret this prescription and administer this medication.
brand name
frequency
strength of solution
weight of child
route
In: Nursing
A piston-cylinder device initially contains 0.3 m3 of nitrogen gas at 350 kPa and 35 ℃. An electric heater within the device is turned on and is allowed to pass a 240W for 6 minutes. Nitrogen expands at constant pressure, and a heat loss of 3000 J occurs during the process. Determine the final temperature of the nitrogen. (Average CP for Nitrogen is 1.039 kJ/kgK and molecular weight of Nitrogen is 28.01 kg/kmol.)
In: Other
A manufacturing firm has a monthly production of units modeled
by?(?, ?) = 50?0.7?0.3 where x is the number of units of labor and
y is the number of units of capital.
The company has a budget of $75,000 per month for labor and
capital. If each unit of labor costs $30 and each unit of capital
costs $25, how much should the company spend on labor and materials
in order to maximize their production?
In: Math