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 rigid tank of volume 0.3 m3 contains water initially at its critical point. The water is now cooled to 150°C
a) What mass of water is in the tank?
b) Has the average specific volume of this water changed during the cooling process?
c) Find the mass of liquid water and the mass of water vapor in the tankat the end of the process.
d) Find the volume of liquid water and the volume of water vapor in the tank at the end of the process.
e)Find the quality of the final mixture. Is it meaningful to talk about the quality of the water at the initial state of this process? Why or why not?
f) Find the enthalpy change of the water in the tank.
In: Chemistry
1A) A 0.3-kg block, attached to a spring, executes simple harmonic motion according to x = 0.08 cos (35 rad/s⋅t), where x is in meters and t is in seconds. Find the total energy of the spring-mass system.
Ans.E =1.18 J
1B) A 1.5-kg cart attached to an ideal spring with a force constant (spring constant) of 20 N/m oscillates on a horizontal, frictionless track. At time t = 0.00 s, the cart is released from rest at position x = 10 cm from the equilibrium point. Find the position of the cart and its velocity at t = 5.0 s
Ans. x=8.25 cm
In: Physics