2. Which is more dangerous, touching a faulty 110-volt light bulb or a Van de Graaff generator charged to 100,000 volts? Why? Give a detailed elaborate answer.

3. Calculate the size of the force that would be experienced by a 3.0 µC charge placed into a uniform electric field of strength 1.0 x 10⁵ N/C.

4. A – 5.0 mC charge travels due south under the influence of a 10 N force when placed into a uniform electric field. What force would a 10 mC charge experience if placed in the same field and in which direction would it move?

5. What is the magnitude of a point charge that would create an electric field of 1.00 N/C at points 1.00 m away?

6. Consider a fixed point charge of +2.00 μC. What is the magnitude and direction of the electric field at a point P, a distance of 0.100 m away?

7. An electric field has an electric field strength 6000. N/C at a distance of 1.5 m. What is the strength of the field at a distance of 6.0 m?

8. 24. An alpha (α) particle is positioned in an electric field such that the gravitational force acting on it is equal to the electrostatic force.

             (q_α = 3.2 x 10^–19 C and m_α = 6.64 x 10^–27 kg)

a) What is the direction of the electric field at this point?

b) What is strength of the electric field?

c) If the field is located 0.25 m away, what is the magnitude of the charge?

9. Determine the potential at a point 0.50 m from a 20. µC point charge.

10. An electric field is parallel to the x-axis. What is the magnitude and direction of the electric field if the potential difference between x = 1.0 m and x = 2.5 m is found to be +900 V?

11. A charged droplet of mass 5.88 x 10^–10 kg is hovering motionless between two parallel plates. The parallel plates create have a potential difference of 24000 V and are 2.00 mm apart. What is the charge on the particle?

Write a class called CheckUserName.

CheckUserName must have a main method.

Your program must ask for a user name.  If the name is on the list
below (Liam, for example) greet the user saying:

welcome back: Liam

If the user is an admin (like Benkamin, for example) print:

welcome back: Benjamin
you have admin privileges

Your program must accept upper case or lower case:

emacs% java CheckUserName
enter a user name: Liam
welcome back: Liam
emacs% java CheckUserName
enter a user name: liam
welcome back: liam


Here is the list of users:

Liam
Noah
William
James
Oliver
Benjamin admin
Elijah
Lucas
Mason
Logan
Alexander admin
Ethan
Jacob
Michael
Daniel admin
Henry
Jackson
Sebastian

Don't use switch

Examples:

emacs% java CheckUserName
enter a user name: Liam 
welcome back: Liam 
emacs% java CheckUserName 
enter a user name: liam 
welcome back: liam 
emacs% java CheckUserName 
enter a user name: Oliver 
welcome back: Oliver 
emacs% java CheckUserName 
enter a user name: Benjamin 
welcome back: Benjamin 
you have admin privileges 
emacs% java CheckUserName 
enter a user name: benjamin 
welcome back: benjamin 
you have admin privileges 
emacs% java CheckUserName 
enter a user name: foo 
You are not a recognized user emacs%

I have this for the java code

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;

public class CheckUserName {

    public static void main(String[] args) {
        //users list
        HashSet<String> users = new HashSet<>();
        users.add("liam");
        users.add("noah");
        users.add("william");
        users.add("james");
        users.add("oliver");
        users.add("elijah");
        users.add("lucas");
        users.add("mason");
        users.add("jacob");
        users.add("logan");
        users.add("ethan");
        users.add("michael");
        users.add("henry");
        users.add("sebastian");
        users.add("jackson");
        //admins list
        HashSet<String> admins = new HashSet<>();
        admins.add("benjamin");
        admins.add("alexander");
        admins.add("daniel");
        Scanner sc = new Scanner(System.in);
        System.out.println("enter a user name: ");
        String name = sc.nextLine();
        //checking in users list
        if (users.contains(name.toLowerCase())) {
            System.out.println("Welcome back " + name);
        }
        //checking in admins list
        else if (admins.contains(name.toLowerCase())) {
            System.out.println("Welcome back " + name);
            System.out.println("you have admin privileges ");
        }

        else System.out.println("You are not a recognized user");
    }
}

but I run it, it says "enter a user name:" your output, "enter a user name: welcome back: sebastian" expected output (error with the different names )

C++ exercise ! Change the WEEK‐4 program to work through the GradeBook class.

This program has some functionality that you can use with the Gradebook class.

So, please revise Gradebook class so that the class can use sort() and display() functions of WEEK4 program .

week-4 program :

#include
#include
using namespace std;

void sort(char nm[][10]);
void display(char name[][10]);

int main() {
char names[10][10];
int i;
for (i=0; i<10; i++)
{

cout << "Enter name of the student : ";
cin >> names[i];
}
sort(names);

display(names);

return 0;
}

void sort(char nm[][10]){
char temp[10];
cout <<"Sorting names in Ascending Order " << endl;

for (int i = 0; i <10; ++i)
for (int j =i+1; j<10; j++)
{

if (strcmp(nm[i],nm[j])>0)
{

strcpy(temp,nm[i]);
strcpy(nm[i],nm[j]);
strcpy(nm[j],temp);
}
}

};
void display(char nm[][10]) {

cout <<"Displaying names in Ascending Order " << endl;

for (int i = 0; i <10; ++i)
{
cout<< nm[i] << " " <

}

}

--------------------------------------------------------------------------------

Gradebook class:

#include
#include // program uses C++ standard string class
using namespace std;

// GradeBook class definition
class GradeBook
{
public:

// function that sets the course name
void setCourseName( string name )
{
courseName = name; // store the course name in the object
} // end function setCourseName

// function that gets the course name
string getCourseName() const
{
return courseName; // return the object's courseName
} // end function getCourseName

// function that displays a welcome message
void displayMessage() const
{
// this statement calls getCourseName to get the
// name of the course this GradeBook represents
cout << "Welcome to the grade book for\n" << getCourseName() << "!"
<< endl;
} // end function displayMessage

private:
string courseName; // course name for this GradeBook
}; // end class GradeBook

// function main begins program execution
int main()
{
string nameOfCourse; // string of characters to store the course name
GradeBook myGradeBook; // create a GradeBook object named myGradeBook

// display initial value of courseName
cout << "Initial course name is: " << myGradeBook.getCourseName()
<< endl;

// prompt for, input and set course name
cout << "\nPlease enter the course name:" << endl;
getline( cin, nameOfCourse ); // read a course name with blanks
myGradeBook.setCourseName( nameOfCourse ); // set the course name

cout << endl; // outputs a blank line
myGradeBook.displayMessage(); // display message with new course name
} // end main

Morton Forms
Morton Forms is a Canadian controlled private corporation owned by Viola Morton. For the
taxation year ended December 31, 2016, Ms. Morton's daughter, Linda, who works in the
business, has calculated a Net Income for Morton Forms of $576,183. In calculating this figure,
Linda used generally accepted accounting principles.
Linda has produced the following Income Statement for the year ended December 31, 2016:
Morton Forms Inc.
Income Statement Year ending December 31, 2016
Sales $ 7,578,903
Cost of Goods Sold 5,468,752
Gross Profit 2,110,151
Expenses
General and Admin $ 852,000
Amortization Expense 550,000
Interest 8,500 1,410,500
Operating Income    699,651
Other Income:
Loss on Disposal of Intangible Assets (17,000)
Interest Income 110,532
Income before income taxes 793,183
Income Taxes
Current 182,000
Future 35,000 217,000
Net Income $ 576,183
During your review of Linda’s work and last year’s tax return for the corporation, you have made
the following notes:
1. In the accounting records, the Allowance for Doubtful Accounts was $25,000 at
December 31, 2016, and $20,000 at December 31, 2105. During 2016, the company
had actual write-offs of $11,750. As a result, the accounting Bad Debt Expense was
$16,750. This amount is included in General and Admin expenses on the Income
statement.
2. A review of the listing of receivables (for tax purposes), indicates that the actual items
that may be uncollectible total $15,000 at December 31, 2106. In 2015, the company
deducted a reserve for bad debits of $13,000 for tax purposes.
3. General and Admin Expenses include:
a) Donations to registered charities 27,000
b) Accrued Bonuses – Accrued Sept 1, 2016. Paid June 15, 2017 78,000
Meals and entertainment costs:
c) $1,000 per month for premium membership at golf club for Viola 12,000
d) $200 per month for membership at golf club for salespeople 2,400
e) Meals while entertaining clients 32,000
f) Food costs for Viola’s personal chef for her meals at home 5,000
g) Annual summer BBQ for all staff 6,000
h) Sponsorship of local baseball team where company name is
prominently displayed on front of jersey 15,000
i) Advertising in a US trade magazine directed at US clients 100,000
j) New software purchased October 1, 2016. ($13,000 for applications
and $25,000 for systems) 38,000
k) Accounting and legal fees for amended to the articles of
incorporation 6,000
l) Costs to attend annual convention of finger knitters in Thailand.
While at the convention, Viola was sure to hand out business cards
and talk to other attendees about her business with the intention of
claiming the convention as a business expense. 17,000
4. Interest expense consists of the following:
a) Interest expense - operations 5,000
b) Penalty and interest for late and insufficient instalment payments 2,000
c) Interest on late payment of municipal property taxes 1,500

5. Travel costs (included in general and admin expenses) include both air travel and travel
reimbursement to employees for business travel. The company policy is to reimburse
employees $0.58 per kilometer for the business use of their automobiles. During the
year, seven employees each drove 4,000 on employment related activities and one
employee drove 7,500 kilometers. None of the kilometer based allowances are required
to be included in the income of the employees.
6. Maximum CCA has always been taken on all assets. The undepreciated capital cost
balances at January 1, 2016 were as follows:
Class 1 (4%) $650,000
Class 8 95,000
Class 10.1 17,850
Class 14 68,000
Class 291 135,000
Class 44 65,000

1In 2012, used manufacturing and processing equipment was purchased for $4,750,000
from another clothing manufacturer who had gone bankrupt. CCA on this equipment
was fully claimed in 2013, 2014 and 2015. Last year, additional manufacturing and
processing equipment was purchased for $180,000.
7. There was a loss on disposal of a limited life license to produce copyrighted materials for
a major distributor. This license originally cost the company $95,000 , and it was sold for
$63,000 in 2016. The book value of the license at the time of sale was $80,000. When
the license was sold, it was the only asset in its CCA class. The loss was claimed as a
loss on disposal of intangible assets on the Income Statement.

8. The cumulative eligible capital balance at January 1, 2016 was $18,098. Three-quarters
of the $30,000 cost of incorporating the business was put in the CEC account in 2012.
No other items were included in this account prior to the current year.

9. Purchases and sales of equipment and other capital assets made during 2016 were as
follows. (Note: any items discussed in other sections are included in this list as well)
a. The company purchased land and constructed a new building on it during the year.
The building was used 95% for manufacturing and processing. The cost of the land
was $350,000, and the building cost $475,000 to construct.
b. The company purchased a new set of furniture for the reception area for $1,200.
c. Some outdated desks used by the finance department with a cost of $5,000 were
sold for proceeds of $3,500.
d. Landscaping of grounds around the new building cost $35,000. This amount was
capitalized for accounting purposes.
e. A company car for use by the president of the company was purchased for $90,000.
This car replaced the only other existing company car, which was purchased in 2013
for $95,000. The old car was sold for $60,000.
f. A fence around the new building cost $52,000.
g. New software was purchased: $13,000 for Applications and $25,000 for Systems.

10. The company sold some shares that had been purchased several years ago. The
capital gain on these shares was $152,708. Linda didn’t know how to account for this,
so she credited the entire amount to retained earnings.
Required:
Determine Morton Forms’ minimum Net Income for Tax Purposes for the year ending December
31, 2106. Ignore GST/HST/PST implications. Using the supplied formatted Excel spreadsheet,
indicate your rationale for the treatment of all information given.

The streamlines of the velocity field

v(x,y,z)=xlnzi+ylnzj+xk

have equations:

how to calculate External Quantum Efficiency from I-V-L graph? Explain in details.

Ignoring extinction effects, does a star's "color"

(B-V) depend on its distance? Explain.