A battery is constructed based on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+ are 1.1×10−4 M and 1.6 M , respectively, in 1.0-liter half-cells. What is the initial voltage of the battery? Answer:2.8. What is the voltage of the battery after delivering 5.0 A for 8.0 h ? How long can the battery deliver 5.0 A before going dead? Please show all step thank you
In: Chemistry
Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed to collide into a tumor, killing the malignant cells. Suppose a proton accelerator is 4.0 m long and must accelerate protons from rest to a speed of 1.0 × 107 m/s. Ignore any relativistic effects (Chapter 26) and determine the magnitude of the average electric field that could accelerate these protons.
In: Physics
|
security |
beta |
Standard deviation |
Expected return |
|
S&P 500 |
1.0 |
20% |
10% |
|
Risk free security |
0 |
0 |
4% |
|
Stock d |
( ) |
30% |
13% |
|
Stock e |
0.8 |
15% |
( ) |
|
Stock f |
1.2 |
25% |
( ) |
3) If stock F has an average return of 12%,
1. find the expected return based on CAPM equation and beta 1.2
2. find the abnormal returns, alpha
In: Finance
Suppose you held a diversified portfolio consisting of a $7,500 investment in each of 20 different common stocks. The portfolio's beta is 1.31. Now suppose you decided to sell one of the stocks in your portfolio with a beta of 1.0 for $7,500 and use the proceeds to buy another stock with a beta of 1.35. What would your portfolio's new beta be? Do not round intermediate calculations. Round your answer to two decimal places.
In: Finance
Scheme is a dialect of a programming language called Lisp, which was developed at MIT in 1959. Alice 1.0 was released in 2006 from CMU, and Python in 1994. Based on what you know of the Scheme language, describe the major differences between how it works and how Alice or Python works. What advantages might Scheme have over Alice/Python? What advantages might Alice/Python have over Scheme?
In: Computer Science
Two 0.60 kg basketballs, each with a radius of 10 cm, are just touching. Ignore any other gravitational interactions.
(a) How much energy is required to change the separation between
the centers of the basketballs to 1.0 m?
_____ J
(b) How much energy is required to change the separation between
the centers of the basketballs to 10 m?
_____ J
As usual, if you don't draw the picture, label distances, you'll use the formula incorrectly.
In: Physics
Human Resource Planning (HRP) represents a significant improvement on traditional Manpower Planning exercise.
To what extent does HRP represent an improvement towards an organisation’s assessment of it human resource needs?
1.0 Introduction
2.0 Human Resource Planning (HRP)
2.1 Definition of Human Resource Planning
2.2 Role of Human Resource Planning
2.3 Objectives of Human Resource Planning
2.4 Process of Human Resource Planning
In: Operations Management
Dinitrogen pentoxide (N2O5) decomposes in chloroform as a solvent to yield NO2 and O2. The decomposition is first order with a rate constant at 45 oC of 1.0 x 10–5 s–1. Calculate the partial pressure (in atm) of O2 produced from 1.00 L of 0.600 M N2O5 solution at 45 oC over a period of 20.0 h if the gas is collected in a 10.0-L container. (assume that the products do not dissolve in chloroform.)
In: Chemistry
A 3.3 kg object is pulled by 4 ropes. One rope is used to pull the object 15° North of East with a force of 25 N. A second rope pulls it due south with a force of 15 N. A third pulls the object 22° west of north with a 36 N magnitude. If the object is moving due west with a constant acceleration (a=1.0 m/s^2 ), describe the force (magnitude and direction) applied by the 4th rope.
In: Physics
The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9520 observations, the sample mean interval was x1 = 61.2 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 25,340 observations, the sample mean time interval was x2 = 71.2 minutes. Historical data suggest that σ1 = 8.35 minutes and σ2 = 12.41 minutes. Let μ1 be the population mean of x1 and let μ2 be the population mean of x2.
(a) Compute a 95% confidence interval for μ1 – μ2. (Use 2 decimal places.)
| lower limit | |
| upper limit |
(b) Comment on the meaning of the confidence interval in the context of this problem. Does the interval consist of positive numbers only? negative numbers only? a mix of positive and negative numbers? Does it appear (at the 95% confidence level) that a change in the interval length between eruptions has occurred? Many geologic experts believe that the distribution of eruption times of Old Faithful changed after the major earthquake that occurred in 1959.
Because the interval contains only positive numbers, we can say that the interval length between eruptions has gotten shorter.
Because the interval contains both positive and negative numbers, we can not say that the interval length between eruptions has gotten longer.
We can not make any conclusions using this confidence interval.
Because the interval contains only negative numbers, we can say that the interval length between eruptions has gotten longer.
In: Statistics and Probability