search the internet for the Stanford Experiment and see the different perspective about this experiment afer viewing the video, if you have been a guard, do you think you would have been more likely to go along with the other guards or would you have resisted or spoken up about treating the prisoners the way you would have wanted to be treated if the roles had been reversed??
In: Psychology
3.This experiment explores the concept of osmosis, with a hands on experiment using potatoes and salt water in your kitchen at home. Be sure to read the instructions for the potato experiment
Actions
in the lab handout ahead of time so you can get the materials you need for the lab before you do it!
In your prelab, you explored diffusion through a semipermeable membrane. In that activity, small particles could easily pass through the semipermeable dialysis membrane. But all semipermeable membranes are not equal! Before starting this lab, consider the following.
A living membrane is considered to be semipermeable. Is it permeable to the same substances as the dialysis membrane used in prelab? Which of the following substances do you expect to passively move through the plasma membrane of potato cells? Pick all that apply.
Group of answer choices
sodium ions
chloride ions
water
4.The passive movement of solutes across a living membrane is called .
The passive movement of water across a living membrane is called .
In: Biology
PH experiment:
What is one real-world or practical application for this experiment or portion of this experiment?
Define the following: abscissa, acid, base, endpoint, equivalence point, neutralization, pH, pKa, mono- protic acid, polyprotic acid, ordinate, strong acid, strong base, and weak acid.
Draw the structure of each of the acids in Table 1.
Produce data tables for each of your runs. Leave room in your notebook for lots of data. Record the actual volume of titrant and solution pH as you conduct the experiment.
Identify all potentially hazardous steps in your procedure. In your own words, explain what safety precautions should be taken and why.
Consider the titration of 0.050 M HCl with 0.050 M NaOH. Calculate the pH: (a) of the pure HCl solution; (b) of 25.00 mL acid plus 12.50 mL base; (c) at the equivalence point; and (d) of 25.00 mL acid and 37.50 mL base.
Consider the titration of 0.050 M NaOH with 0.050 M HCl. Calculate the pH: (a) of the pure NaOH solution; (b) of 25.00 mL base plus 12.50 mL acid; (c) at the equivalence point; and (d) of 25.00 mL base and 37.50 mL acid.
In one experiment, an unknown acid was titrated with NaOH. The pH at the equivalence point was 7.75. Was the unknown acid strong or weak? Explain. Hint: The pH of pure water at room temperature is 7.
In: Chemistry
Name: .
A manager of a local clothing retail store wants to make a sales and promotion plan for next month. In order to evaluate the effectiveness of the plan, the manager identifies all the costs and other relevant information and conducts Break-even analysis. Here are the identified costs and other related information.
Monthly rent fees: $2,500
Wages for the hired employees (Monthly): $6,000
Utility fees (Monthly): $700
Other operation costs (Monthly): $1,000
Purchase price per unit: $78 (The manager purchases clothing from other retailers)
Shipping and handling cost per unit: $12
(Assume there is no other cost)
Answer 9000 :
What is the Variable cost per unit?
Answer 90 :
The manager wants to have 20% profit margin on selling price. What is the selling price per unit at the retail store?
Answer : 240 :
How many product units must be sold a month to break even?
Answer 68 :
What is the revenue at the break-even point?
Answer 409.09 :
The manager wants to have total profit of $5,000 a month. How many product units must be sold to achieve this goal?
Answer :
Now the manager considers two marketing promotion options.
Option 1: Advertising on a local cable channel next month. The advertising cost is $2,000.
How many product units must be sold to cover the Total Cost (including the advertising cost)?
Answer :
Option 2: Sales promotion next month (10% price discount on selling price).
.How many product units must be sold to cover the Total Cost (including sales promotion cost)?
Answer
In: Accounting
PART IV - ANALYSIS AND INTERPRETATION OF EPIDEMIOLOGIC RESULTS
The following food exposure information was collected through the cohort study. On January 19, the information was tabulated by epidemiologists from the Argentine MOH. (Table 2)
Table 2. Foods eaten by ill and well bus drivers at the home at the terminal bus stop, January 3-7, 1998. (N=21)
|
Food item |
Ate item |
Did not eat item |
||
|
Ill |
Well |
Ill |
Well |
|
|
Bologna |
1 |
0 |
8 |
12 |
|
Hot dog |
1 |
1 |
8 |
11 |
|
Matambre* |
9 |
2 |
0 |
10 |
|
Mate** |
4 |
4 |
5 |
3 |
|
Processed Ham |
2 |
3 |
7 |
9 |
|
Sauce |
7 |
2 |
2 |
10 |
|
Salami |
1 |
1 |
8 |
11 |
|
Solid ham |
2 |
3 |
7 |
9 |
*Matambre is a traditional meat roll in Argentina.
**Mate is green tea.
Question 12: Calculate the appropriate measures of association for these exposures.
Question 13: Interpret the results. What further data analysis/information might help?
In: Biology
The goal of this laboratory is to acquire the
necessary knowledge needed to build and analyze a
basic electrical circuit. You will need to watch two videos
introducing the multimeter and the
breadboard. After watching these videos, you will need to answer
five relatively short questions
regarding the concept seen in the videos. Note, after much thought,
i decided to use two videos
from youtube. The creators of these videos did a wonderful job
explaining the different detail
pertaining to these two pieces of equipment.
The video for the multimeter demonstration can be found here:
https://www.youtube.com/watch?v=SLkPtmnglOI
The video for the breadboard can be found here:
https://www.youtube.com/watch?v=6WReFkfrUIk
In the diagram above we have two resistors R1 and R2 connected to a
power source V. The points
A,B,C,D,E and F are considered to be solderless connectors. Four
wires are connecting the entire
circuit. These wires connect the point A and B, B and C, D and E
and finally E and F together. Any of
the wires, or electrical components, could be removed to make a
measurement. Refer to this
diagram for question 1 to 4.
Question 1 (10 points): Using the multimeter explain how you would
measure the voltage drop on
R1? Did you have to remove any component to make the
measurement?
Question 2 (10 points): Using the multimeter explain how you would
measure the resistance of R1?
Did you have to remove any component to make the measurement?
Question 3 (10 points): Using the multimeter explain how you would
measure the current going
through R2? Did you have to remove any component to make the
measurement?
Question 4 (10 points): Using the multimeter explain how you would
measure the total current of
the circuit? Did you have to remove any component to make the
measurement?
Question 5 (10 points): Name two common mistake made by the student
when using a breadboard
In: Physics
2016 2017
Sales $75,000 $90,000 Cost of Goods Sold 45,000 54,000 Gross Profit $30,000 $36,000 Operating Expense 15,000 15,000 Net Income $15,000 $21,000 Compute the corrected net income for 2016 and 2017 assuming that the inventory as of the end of 2016 was mistakenly understated by $7,000.
2016 2017
Corrected net income ______ _______
In: Accounting
Depreciation Methods
Gruman Company purchased a machine for $198,000 on January 2, 2016. It made the following estimates:
| Service life | 5 years or 10,000 hours |
| Production | 180,000 units |
| Residual value | $ 18,000 |
In 2016, Gruman uses the machine for 1,700 hours and produces 45,000 units. In 2017, Gruman uses the machine for 1,200 hours and produces 32,000 units. If required, round your final answers to the nearest dollar.
If Gruman used a service life of 8 years or 15,000 hours and a residual value of $9,000 , what would be the effect on the following under the straight-line, sum-of-the-years'-digits, and double-declining-balance depreciation methods?
Depreciation expense
Straight-line method
2016 $
2017 $
Sum-of-the-years'-digits method
2016 $
2017 $
Double-declining-balance method
2016 $
2017 $
Book value Straight-line method
2016 $
2017 $
Sum-of-the-years'-digits method
2016 $
2017 $
Double-declining-balance method
2016 $
2017 $
In: Accounting
Introduction:
One of the advantages of using Loops is to reduce the amount of programming effort especially when repeating the code is required. To demonstrate this advantages, the code below shows the PasswordGeneration class. The purpose of this program is to generate an ad hoc 12 letters long password upon a selection of a character from a string that contains a pool of letters.
|
/*simple Java program that generate a 12 characters long passwords * author : Dr. Modafar Ati * Version 1.0 */ public class PasswordGeneration { public static void main(String[] args) { String password; //create a pool of letters String letters = new String("&*()789FGHIJKabcdefghijklmLMNO^|{]}PQRSTU!@#$%VWXYZ123456nopqrstuvwxyzABCDE"); //select 12 random characters from the above pool char c1 = letters.charAt((int)(Math.random()*letters.length())); char c2 = letters.charAt((int)(Math.random()*letters.length())); char c3 = letters.charAt((int)(Math.random()*letters.length())); char c4 = letters.charAt((int)(Math.random()*letters.length())); char c5 = letters.charAt((int)(Math.random()*letters.length())); char c6 = letters.charAt((int)(Math.random()*letters.length())); char c7 = letters.charAt((int)(Math.random()*letters.length())); char c8 = letters.charAt((int)(Math.random()*letters.length())); char c9 = letters.charAt((int)(Math.random()*letters.length())); char c10 = letters.charAt((int)(Math.random()*letters.length())); char c11 = letters.charAt((int)(Math.random()*letters.length())); char c12 = letters.charAt((int)(Math.random()*letters.length()));
// Combine all characters into a string that represent the generated password password = Character.toString(c1) +Character.toString(c2) + Character.toString(c3); password += Character.toString(c4) +Character.toString(c5) + Character.toString(c6); password += Character.toString(c7) +Character.toString(c8) + Character.toString(c9); password += Character.toString(c10) +Character.toString(c11) + Character.toString(c12);
//present the user with the generated password System.out.println("Password generetad is : " +password); } } |
Now upon implementing Loops strategy, the number of lines of the previous program will be reduced significantly. Version 2 of the above code can be written after adding more functionality to it is shown below. The new code has extra flexibility added to it by given the user to specify the size of the password required.
|
/*simple Java program that generate a flexible size passwords * author : Dr. Modafar Ati * Version 2.0 */ import java.util.Scanner; public class PasswordGeneration { public static void main(String[] args) { Scanner input = new Scanner(System.in); String password=""; char c; int size = 0; String letters = new String("&*()789FGHIJKabcdefghijklmLMNO^|{]}PQRSTU!@#$%VWXYZ123456nopqrstuvwxyzABCDE"); System.out.print("What is the length of password would you like to generate : "); int lengthOfPasswords =input.nextInt();
while(size < lengthOfPasswords) { //select a random character from the list c = letters.charAt((int)(Math.random()*letters.length()));
//now append the letter to the pass String password += Character.toString(c);
size++; } System.out.println(password); input.close(); } } |
Task:
You are required to modify the second version of the program to satisfy the following conditions:
PS: Below is a sample output of the program
|
How many passwords would like to generate : 5 What is the length of password would you like to generate : 15 The following 5 are now generated ________________________________________________________________ tE3gEZMSEHtA6Ku n%iPfc%JGZaxGk6 Z^Rhdz5f7OIVx2F jh3dldFfFO9W)kS Kpjn$]9Pmpm(bX3 Would you like to generate another set of passwords (Y/N ) : y How many passwords would like to generate : 10 What is the length of password would you like to generate : 10 The following 10 are now generated ________________________________________________________________ &^upcN&DvY *x^D2(tX}$ Ie9HjCCIkD oOr*mT{kpC 4H7cz$m2U$ (]BBIRykgW *V8vTh2DN& BMxw%W8*|v dyLivkl)U1 hP4eFeI5FM Would you like to generate another set of passwords (Y/N ) : N Thank you |
Notes :
In: Computer Science
Quiz 2
Hippocrates
Thomas Sydenham
James Lind
Benjamin Jesty
Edward Jenner
Ignaz Semmelweis
John Snow
Louis Pasteur
Robert Koch
John Graunt
William Farr
Bernardino Ramazzini
Edgar Sydenstricker
Doll and Hill
Florence Nightingale
Janet Lane-Claypon
Alice Hamilton
Wade Hampton Frost
Identified various modes of transmission and incubation times for cholera
B. Provided classifications of morbidity statistics to improve the value of morbidity information
C. Observed in the 17th century that certain jobs carried a high risk for disease
D. Introduced the words "epidemic" and "endemic"
E. Advanced useful treatments and remedies including exercise, fresh air, and a healthy diet, which other physicians rejected at the time
F. Through an experimental study, showed that lemons and oranges were protective against scurvy
G. Invented a vaccination for smallpox
H. The father of modern epidemiology
I. Used data as a tool for improving city and military hospitals
J. Conducted the first cohort study investigating the association between smoking and lung cancer
K. Promoted the idea that some diseases, especially chronic diseases, can have a multifactorial etiology
L. Observed that milkmaids did not get smallpox, but did get cowpox
M. Developed a vaccine for anthrax
N. Pioneered the use of cohort and case-control studies to identify risk factors for breast cancer
0. A pioneer in the field of toxicology
P. Credited for producing the first life table
Q. Used photography to take the first pictures of microbes in order to show the world that microorganisms in fact existed and that they caused many diseases
R. A statistician who was a pioneer in developing the theory of epidemiologic study design and causal inference
S. Discovered that the incidence of puerperal fever could be drastically cut by the use of hand washing standards in obstetrical clinics
2. List some of the contributions of the microscope to epidemiology.
3. What two individuals contributed to the birth of vital statistics?
What type of epidemiologic study was used by James Lind?
5. What types of epidemiologic studies were used by Doll and Hill?
In: Biology