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3 years ago

Find the unknown quantities

Computers and Technology

1 answer:

MrMuchimi3 years ago

3 0

Answer:

I = 11/2 = 5.5

R = 60/11 ≈ 5.5Ω

Explanation:

You use V = I·R twice.

Entire circuit: 140 = I·(20+R)

Resistor: 30 = I·R

Solving this system of equations gives:

140 = I·(20+R) = 20I + IR

30 = I·R

140 = 20I + 30

20I = 110

I = 11/2 = 5.5

R = 60/11 ≈ 5.5Ω

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Demonstrate your grasp of the Unix file system by constructing a directory structure as follows: In your home ( ~ ) directory, c

s2008m [1.1K]

Answer:

The steps to follow in executing the command are listed in the Explanation section

Explanation:

Open the terminal using Ctrl + Alt + T

To go to home directory, type: cd ~ OR just cd

To create a directory named UnixCourse, type: mkdir UnixCourse

To change directory to UnixCourse, type: cd UnixCourse

To create a fileAsst directory, type: mkdir fileAsst

To change directory into fileAsst, type: cd fileAsst

To create TweedleDee directory, type: mkdir TweedleDee

To create TweedleDum direectory, type: mkdir TweedleDum

To view the directory, type: ls

To copy from one directory to another:

cp ~/cs252/Assignments/fileAsst/hatter.txt ~/UnixCourse/fileAsst/TweedleDee

To change to TweedleDee directory and list to view:

cd TweedleDee

cd .. (this is to go back to the fileAsst directory)

To copy from one directory to another:

cp ~/cs252/Assignments/fileAsst/dormouse.txt ~/UnixCourse/fileAsst/TweedleDum

To change to TweedleDum directory and list to view:

cd TweedleDum

cd .. (this is to go back to the fileAsst directory)

The command below is executed as required:

~/cs252/bin/fileAsst-1

We check the directory for new file:

ls (to display entire file/folder)

then move the new file to TweedleDee directory

mv ~/UnixCourse/fileAsst/'name of file' ~/UnixCourse/fileAsst/TweedleDee

we then rename the file to rabbit.dat

mv ~/UnixCourse/fileAsst/TweedleDee/'name of file' ~/UnixCourse/fileAsst/TweedleDee/rabbit.dat

cd .. (this is to go back to the fileAsst directory)

The command below is executed as required:

~/cs252/bin/fileAsst-2

7 0

4 years ago

You work for a company that is growing. Originally, all the users in all departments had access to all the data in the database.

elena-s [515]

Answer:

Authorization levels (privileges) need to be set for the users in the company.

Explanation:

Users need to be classified according to their departments and their position. Each group should see only related data, so their authorizations need to be done accordingly.

Also managers and staff should have different levels of reach to the data. Thus their privileges should set accordingly.

7 0

3 years ago

Read 2 more answers

Because we allow everyone full control, how do you make sure that the shared files are secure?

alina1380 [7]

Make private accounts on defiant servers

4 0

4 years ago

The function below takes one parameter: a string (date_string) containing a date in the mm/dd/year format. Complete the function

Natalija [7]

Answer:

The solution code is written in Python 3.

def convertDate(date_string):
date_list = date_string.split("/")
for i in range(0, len(date_list)):
date_list[i] = int(date_list[i])
return date_list
print(convertDate('06/11/1930'))

Explanation:

Firstly, create a function convertDate() with one parameter, date_string. (Line 1).

Next, use the Python string split() method to split the date string into a list of date components (month, day & year) and assign it to variable date_list. (Line 3) In this case, we use "/" as the separator.

However, all the separated date components in the date_list are still a string. We can use for-loop to traverse through each of the element within the list and convert each of them to integer using Python int() function. (Line 5 - 6)

At last return the final date_list as the output (Line 8)

We can test our function as in Line 11. We shall see the output is as follow:

[6, 11, 1930]

8 0

3 years ago

1. row a statement you submit to get paid for a product or service 2. spreadsheet software used by many business professionals t

Ivenika [448]

Answer:

1. row a horizontal set of data in a spreadsheet

2. spreadsheet software used by many business professionals to work with numbers

3. data information that is stored

4. template a file that serves as a starting point for a new document

5. function a built-in formula in a spreadsheet

6. invoice a statement you submit to get paid for a product or service

Explanation:

The correct matches have been mentioned in the answer section. Certainly, a row is the horizontal set of data is a spreadsheet. And other options are self-understood. And hence, it is self-explanatory.

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3 years ago