You roll two fair dice, and denote the number they show by X and Y. Let U = min{X, Y } and V = max{X, Y }. Write down the joint probability mass function of (U, V ) and compute ρ(U, V ) i.e the correlation coefficient of U and V
In: Statistics and Probability
What is the value for Ecell for the reaction shown below if each one of the dissolved species has a concentration of 0.1 M?
2 Fe3+ (aq) + 2 I-(aq) → 2 Fe2+(aq) + I2(s)
a) -0.35 V
b) -0.29 V
c) +0.11 V
d) +0.17 V
In: Chemistry
A silver wire with resistivity 1.59 x 10^-8 ? x m carries a current density of 4.0 mm^2. What is the magnitude of the electric field inside the wire?
A) 0.064 V/m
B) 2.5 V/m
C) 0.040 V/m
D) 0.10 V/m
In: Physics
There is some evidence that, in the years 1981-85 , a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw, "Does it pay to change your company's name? A stock market perspective," Marketing Science v., pp.320-35, 1987 .) Suppose that, to test the profitability of name changes in the more recent market (the past five years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about 0.72%, with a standard deviation of 0.11%. Suppose that this mean and standard deviation apply to the population of all companies that changed names during the past five years. Complete the following statements about the distribution of relative increases in stock price for all companies that changed names during the past five years. (a) According to Chebyshev's theorem, at least 36% of the relative increases in stock price lie between ___ and ___ . (Round your answer to 2 decimal places.) (b) According to Chebyshev's theorem, at least ___of the relative increases in stock price lie between 0.50 % and 0.94 %. (c) Suppose that the distribution is bell-shaped. According to the empirical rule, approximately ___ of the relative increases in stock price lie between 0.50 % and 0.94 %. (d) Suppose that the distribution is bell-shaped. According to the empirical rule, approximately 99.7% of the relative increases in stock price lie between ___and ____ .
In: Statistics and Probability
Use a 2N7002 MOSFET, connect the source to ground and add separate DC voltage sources to the gate and drain. Set the voltages to 2.5 V (gate) and 5 V (drain). Save an image of your circuit and include it in your document. Perform a dc operating point (DC op pnt) simulation and paste the output (as text) in your document. Confirm that the operating point is at approximately VGS = 2.5 V and ID = 62 mA. [3 marks]
b) Use your circuit and the “DC sweep” simulation option to generate the drain current characteristics for this MOSFET. You should setup the drain voltage as the first source to sweep (from 0 V to 10 V at 1 mV intervals) and the gate voltage as the second (from 1 V to 3 V at 0.25 V intervals). Run the simulation and include a plot of the drain current in your document (your plot should, of course, consist of multiple curves). NOTE USING LTspice
In: Electrical Engineering
1. One of the half-reactions for the electrolysis of
water is
2H2O(l)
→O2(g)
+ 4H+(aq) +
4e−
If 0.992 L of O2 is collected
at 25°C and 755 mmHg, how many faradays of
electricity had to pass through the solution?
2.
| What is E°cell for the following reaction? |
| 2 Ag(s) + Sn2+(aq) → 2 Ag+(aq) + Sn(s) |
| Ag+(aq) + e– → Ag(s) | E° = 0.80 V |
| Sn4+(aq) + 2e– → Sn2+(aq) | E° = 0.13 V |
| Sn2+(aq) + 2e– → Sn(s) | E° = –0.14 V |
+0.94 V
–0.94 V
+0.67 V
–0.67 V
+1.34 V
3. One of the half-reactions for the electrolysis of
water is
2H+(aq)
+ 2e−
→H2(g)
If 0.845 L of H2 is collected
at 25°C and 782 mmHg, how many faradays of
electricity had to pass through the solution?
In: Chemistry
To integrate a paraphrase into your own discussion, introduce it with a signal phrase that names the author and then provide a full citation at the end.
Click "true" if the following citation is correct.
As PC World columnist Daniel Tynan points out, “Employees could accidentally spill confidential corporate information … or allow worms to spread throughout a corporate network” (8).
In: Economics
The author of the course textbook offered his definition of religion. Based on your own spiritual understandings and beliefs, do you agree with this definition? Explain your reasoning. Cite references where possible.
Corduon's definition of religion is: "A religion is a system of beliefs and practices that directs a person toward transcendence and thus provides meaning and coherence to a person’s life."
In: Psychology
Chapter 2 discusses the guidelines for document retention and destruction. Obviously, we can't keep everything, but what are the rules for retention and destruction?
Note: Texbook we're using-Payroll Accounting 2020 6th edition, Author: Jeanette M. Landin
In: Accounting
In: Economics