EECS 1019 Study Guide - Midterm Guide: Contraposition

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turquoisegnu128

1 Oct 2018

School

York University

Department

Electrical Engineering and Computer Science

Course

EECS 1019

Professor

All

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EECS 1019 Full Course Notes

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Document Summary

In the questions below determine whether the proposition is true or false: if 1 + 1 = 2 or 1 + 1 = 3, then 2 + 2 = 3 and 2 + 2 = 4. Ans: true: if 1 0, then 3 = 4. Ans: true: write the truth table for the proposition (r q) (p r). p q. F f f f: determine whether this proposition is a tautology: ((p q) q) p. Ans: yes. (a truth table should be presented with all t in the last column: p(0 0). In the questions below p(x y) means x + 2y = xy , where x and y are integers. Determine the truth value of the statement: x yp(x y). In the questions below suppose the variable x represents people, and. F(x): x is friendly t(x): x is tall a(x): x is angry. Ans: x(t(x) f(x)): all tall people are friendly, some people are not angry.

Related Questions

Given the following main program

#main
a = [5,2,9,6,3] doubleList(a) print a

Implement the function named doubleList that takes one list argument and modifies the list so that each element in the list is doubled. The statement print(a) in the main program will then have to print [10,4,18,12,6]
Given the following main program

#main
a = [5,2,9,6,3]
b = reversedList(a) print b
print a

Implement the function named reversedList that takes one list argument and returns a list that contains the elements in the list argument in reverse order. The statement print(b) in the main program will then have to print [3,6,9,2,5]. The statement print(a) must print the original list [5,2,9,6,3] unaffected. This means your function should not modify the list argument.
Given the following main program

#main
a = [5,2,9,6,3] reverseList(a) print a

Implement the function named reverseList that takes one list argument and reverses the list so that the modified list contains the same elements in reverse order. The statement print(a) in the main program will then have to print [3,6,9,2,5]
What is the return value of the functions doubleList, reversedList and reverseList in questions 1, 2, and 3 above?

Given the following main program

#main
a = [5,2,9,6,3]
b = evenElements(a) print b

Implement the function named evenElements that takes one list argument and returns a list that contains the elements in the list argument that are even integers. The statement print(b) in the main program will then have to print [2,6]. What is the return value of the function? Your function should not modify the list argument.
Given the following main program

#main
a = [5, 2, 9, 6, 3, 7, 19, 4, 8, 17, 21, 20, 15] removeOddElements(a)
print a

Implement the function named removeOddElements that takes one list argument and modifies the list so that all odd integers in the list are removed. The statement print(a) in the main program will then have to print [2,6,4,8,20]. What is the return value of the function?
Part A
#Main program A=[5,8,2,0,-5,3] n=-5
answer = isFound(A, n) if answer == True:

print "The integer is found in the list" else:

print "The integer is not found in the list."

Consider the main program shown above. Write a Python function named isFound that takes a list of integers and an integer as arguments and returns True if the integer is found in the list; otherwise it returns False.

Remark: You are NOT allowed to use the in operator or any other built in function when you write this function. Instead, you must write a loop to go through the elements of the list.

Part B

Give the following main program

#main
A = [5,2,9,6,3]
B = [2,4,3,9,7,1,6,5]
flag = isList1InList2(A, B) if flag:

print "The list", A, "is contained in the list", B else:

print "The list", A, "is not contained in the list", B

Implement the function named isList1InList2 that takes two list arguments and returns True if and only if each element of the first list argument are found in the second list argument; otherwise it returns False.

Remark: You are NOT allowed to use the in operator or any other built in function when you write this function. Instead, if you wish, you can use the function you wrote in Part A.

For the lists shown in the main program, your function must return True because each element of list A is found in list B.

A given List is known as Palindrome List if the reverse of the List contains the same elements in the same order of the original List. For example the List of integers [2, 5, 0, 3, 3, 0, 5, 2] is a Palindrome because the reverse of the List which is [2, 5, 0, 3, 3, 0, 5, 2] contains the same elements in the same order as the given List. However the List [1, 2, '2', 1] is not Palindrome because its reverse which is [1, '2', 2, 1] does not contain the same elements in the same order as the given List.

Write a Python function named isPalindrome that takes a List as argument and returns True if the argument is a Palindrome List; otherwise it returns False. You don't need to write the main program; just write the function. If you would like to test your function, then it is ok to write the main program too but you will not get any mark for the main program.
Given your function in question #7 above, what is the output of the following code: a=[]

b = [5,2,9,6,3]

print isList1InList2(a,b)
Given your function in question #7 above, what is the output of the following code:

a=[]
b=[]
print isList1InList2(a,b)
Given your function in question #7 above, what is the output of the following code: a = [5,2,9,6,3]

b=[]

print isList1InList2(a,b)

Given the following main program

#main
a=[]
n = readListElements(a)
print "The user entered", n, "elements to the list" print a

Implement the function named readListElements that takes one list argument and modifies the list by repeatedly asking the user to enter integer values and then appending them to the list. The process stops when the user enters -1000. The stopping value -1000 should not be appended to the list. Moreover your function must count the appended elements and return it. Example if the user enters the integers 31, -4, 9, 1,-1000 then your function must modify the list a to a = [31, -4, 9, 1] and return the number elements added which is 4.
Write a function named createRandomList that takes an integer argument n and returns a list with n elements. The elements must be random numbers in the range [0,100]

Given the following main program:

#main

   n = int(input("How many elements do you want in your list? "))
   a = createList(n)
   s1 = sumOfElementsAtEvenIndexes(a)
   print s1

   s2 = sumOfElementsAtOddIndexes(a)
   print s2
   s3 = sumOfAllElements1(a)
   print s3

   s4 = sumOfEvenElements(a)
   print s4
   s5 = sumOfOddElements(a)
   print s5

   s6 = sumOfAllElements2(a)
   print s6
   if (s3 != s6):

         print "Something is wrong in your program."
   else:

         print "Looks like you have done a good job."

Implement the functions as follows:

createList: returns a list object with n elements. The elements are generated randomly so that each element is in the range [15,45]
sumOfElementsAtEvenIndexes: returns the sum of the elements at even indexes. Use a for loop or a while loop.
sumOfElementsAtOddIndexes: returns the sum of the elements at odd indexes. Use a for loop or a while loop.
sumOfAllElements_A: returns the sum of all the elements in the list using the functionssumOfElementsAtEvenIndexes and sumOfElementsAtOddIndexes. Here you are NOT allowed to use any loop; instead make function calls as described.
sumOfEvenElements: returns the sum of the even integer elements in the list. Use a for loop or a while loop.
sumOfOddElements: returns the sum of the odd integer elements in the list. Use a for loop or a while loop.
sumOfAllElementsB: returns the sum of all the elements in the list using the functions sumOfEvenElements and sumOfOddElements. Here you are NOT allowed to use any loop; instead make function calls as described.

17. Most data compression algorithms like winzip, gzip, lzip and etc are based on the frequency distribution of characters in a given string. Write a function named getFreqDistribution that takes a string argument and returns a LIST that has length 26 such that the first element of the list is the number of appearance of 'a' or 'A' in the string, the second element is number of appearance of 'b' or 'B', and so on so forth.

I'm studying python 2 and have a lot of troubles with solving these homework questions.

grayelk171

*Please refer to the attached file.

You are writing a rough draft for the essay part 1,

This writing practice will focus on

Steps *1 and *2 below:

___________________

FIVE STEPS OF WRITING~*1- Prewrite*2-Draft 3- Revise 4- Edit/Proofread 5- Publish

Expository Essay Part 1

Student Resource

EXPOSITORY ESSAY

– explains, points out

Used in articles, essays, exam questions

- Used to report on research

- Used to share information, give directions

REVIEW:

Elements of Expository Essay:

Thesis

–

Thesis Statement states topic, introduces supporting points

Structure

–

- Organization - often by Cause/Effect, Problem/Solution, Compare/Contrast

- Supporting paragraphs (at least one per supporting point)

- Use of formatting, graphics, and multi-media where appropriate

- Conclusion - relates to thesis and pulls supporting points together

Style

–

- Formal tone - complete sentences; conventional construction and language

- Active voice

Assignment:

Complete the first

two

steps in writing an Expository Essay.

You can use the sample writing prompt on Page 3 or choose a topic based on stories/articles of

your choosing. Page 3 also gives a sample thesis and outline based on the writing prompt. If

writing on your own topic and texts, choose three texts from different genres – e.g., short story,

science fiction, poetry, memoir, informational text, etc.

Step 1)

Prewrite

– Write your thesis statement.

– Determine the structure and organization (e.g., compare/contrast).

– Make an Outline (should include the thesis statement plus a list of

supporting points and a conclusion).

Step 2)

Draft

– Follow your Outline.

– Consider the audience's knowledge of and experience with the topic.

– Give concrete examples (each supporting point should be at least one

paragraph).

– Relate each point back to the thesis statement.

– Draw a conclusion that relates to the thesis statement and ties the

supporting points together.

Expository Essay Part 1

Student Resource

EXPOSITORY ESSAY - SAMPLE THESIS AND OUTLINE

WRITING PROMPT

Compare/contrast the authors' treatments of the theme of

taking

responsibility

in three different genres of text:

Short Story

–"Through the Tunnel,"

Science

Fiction

– "A Sound of Thunder," and

Informational Text

– "Quit blaming; take responsibility."

Thesis

Authors Lessing, Bradbury, and Gitomer, writing in three different textual genres,

each address the theme of taking responsibility by contrasting instances of responsible and

irresponsible behavior and drawing the conclusion of the benefits of taking responsibility.

Supporting paragraphs

– with formatting (subtitles):

1. Short Story

– Lessing ("Through the Tunnel") contrasts Jerry's irresponsible/ responsible

behavior and draws conclusion responsibility is best – Jerry feels better about himself.

- Irresponsible: Jerry tries to get attention, be accepted by other boys; wants to swim

through tunnel before ready (examples from story)

- Responsible: Jerry stops trying to please other boys; adopts his quest; trains and works

to be prepared (examples from story)

- Lessing draws unstated conclusion of benefits of taking responsibility

(contrasts Jerry's feelings before and after quest)

2. Science Fiction

– Bradbury ("A Sound of Thunder") contrasts Time Safari Inc.'s/ Eckels'

responsible/irresponsible behavior and graphically illustrates the devastating results of

irresponsibility.

- Irresponsible: Eckels' uncaring, irresponsible attitude (examples in story)

- Responsible: Time Safari's careful planning and preparation for the hunt

(examples

from story)

- Bradbury ends story showing dramatic impact of being irresponsible, implying the

benefits of responsibility

3. Informational Text

–

Gitomer ("Quit blaming; take responsibility") compares salespeople

with politicians in their tendency to avoid taking responsibility and contrasts that attitude with

suggestions on taking responsibility to achieve success.

- Irresponsible: Salespeople and politicians blame others for their failures

(specific examples from article)

- Responsible: Suggestions on how they can take responsibility by

studying failures and

making them successes (examples in article)

- Gitomer concludes that salespeople (and politicians) can achieve results

they seek by

overcoming obstacles and taking responsibility

Conclusion

Authors Lessing, Bradbury, and Gitomer, writing in three different textual

genres, each address the theme of taking responsibility by contrasting instances of responsible

and irresponsible behavior, concluding that taking responsibility brings the best r

This writing practice will focus on

Steps *1 and *2 below:

___________________

FIVE STEPS OF WRITING ~* 1-Prewrite* 2- Draft 3- Revise\ 4- Edit/Proofread 5- Publish

Expository Essay Part 1

Student Resource

EXPOSITORY ESSAY

– explains, points out

Used in articles, essays, exam questions

- Used to report on research

- Used to share information, give directions

REVIEW:

Elements of Expository Essay:

Thesis

–

Thesis Statement states topic, introduces supporting points

Structure

–

- Organization - often by Cause/Effect, Problem/Solution, Compare/Contrast

- Supporting paragraphs (at least one per supporting point)

- Use of formatting, graphics, and multi-media where appropriate

- Conclusion - relates to thesis and pulls supporting points together

Style

–

- Formal tone - complete sentences; conventional construction and language

- Active voice

Assignment:

Complete the first

two

steps in writing an Expository Essay.

You can use the sample writing prompt on Page 3 or choose a topic based on stories/articles of

your choosing. Page 3 also gives a sample thesis and outline based on the writing prompt. If

writing on your own topic and texts, choose three texts from different genres – e.g., short story,

science fiction, poetry, memoir, informational text, etc.

Step 1)

Prewrite

– Write your thesis statement.

– Determine the structure and organization (e.g., compare/contrast).

– Make an Outline (should include the thesis statement plus a list of

supporting points and a conclusion).

Step 2)

Draft

– Follow your Outline.

– Consider the audience's knowledge of and experience with the topic.

– Give concrete examples (each supporting point should be at least one

paragraph).

– Relate each point back to the thesis statement.

– Draw a conclusion that relates to the thesis statement and ties the

supporting points together.

Expository Essay Part 1

Student Resource

EXPOSITORY ESSAY - SAMPLE THESIS AND OUTLINE

WRITING PROMPT

Compare/contrast the authors' treatments of the theme of

taking

responsibility

in three different genres of text:

Short Story

–"Through the Tunnel,"

Science

Fiction

– "A Sound of Thunder," and

Informational Text

– "Quit blaming; take responsibility."

Thesis

Authors Lessing, Bradbury, and Gitomer, writing in three different textual genres,

each address the theme of taking responsibility by contrasting instances of responsible and

irresponsible behavior and drawing the conclusion of the benefits of taking responsibility.

Supporting paragraphs

– with formatting (subtitles):

1. Short Story

– Lessing ("Through the Tunnel") contrasts Jerry's irresponsible/ responsible

behavior and draws conclusion responsibility is best – Jerry feels better about himself.

- Irresponsible: Jerry tries to get attention, be accepted by other boys; wants to swim

through tunnel before ready (examples from story)

- Responsible: Jerry stops trying to please other boys; adopts his quest; trains and works

to be prepared (examples from story)

- Lessing draws unstated conclusion of benefits of taking responsibility

(contrasts Jerry's feelings before and after quest)

2. Science Fiction

– Bradbury ("A Sound of Thunder") contrasts Time Safari Inc.'s/ Eckels'

responsible/irresponsible behavior and graphically illustrates the devastating results of

irresponsibility.

- Irresponsible: Eckels' uncaring, irresponsible attitude (examples in story)

- Responsible: Time Safari's careful planning and preparation for the hunt

(examples

from story)

- Bradbury ends story showing dramatic impact of being irresponsible, implying the

benefits of responsibility

3. Informational Text

–

Gitomer ("Quit blaming; take responsibility") compares salespeople

with politicians in their tendency to avoid taking responsibility and contrasts that attitude with

suggestions on taking responsibility to achieve success.

- Irresponsible: Salespeople and politicians blame others for their failures

(specific examples from article)

- Responsible: Suggestions on how they can take responsibility by

studying failures and

making them successes (examples in article)

- Gitomer concludes that salespeople (and politicians) can achieve results

they seek by

overcoming obstacles and taking responsibility

Conclusion

Authors Lessing, Bradbury, and Gitomer, writing in three different textual

genres, each address the theme of taking responsibility by contrasting instances of responsible

and irresponsible behavior, concluding that taking responsibility brings the best r

isaiahh223g

Grade 9 Science – Lab Safety & Equipment Woksheet

Part A: Highlight ‘T’ for TRUE OR ‘F’ for FALSE for each of the following questions. (K - 35)

1. T F Broken glassware should be swept up immediately and placed in the garbage bin.
2. T F Eyeglasses or contact lenses are an acceptable substitute for googles during an experiment.
3. T F If you arrive at class to find a spilled liquid on your desk, you should assume it is water and wipe
it up with paper towels.
4. T F Students with long hair must tie it back when using Bunsen burners.
5. T F If you take too much of the chemicals needed for an experiment, put it back into the container you
got it from.
6. T F Class B fires are those related to electrical equipment.
7. T F Discard all solid waste by rinsing it down the sink.
8. T F You may consume food and drinks during a lab, as long as it is kept at a safe distance from
chemicals.
9. T F If asked to detect the odour of a chemical in the lab, the student should inhale a deep breath of the
chemical.
10. T F If your clothing were to catch on fire, your first step should be to STOP, DROP and ROLL.
11. T F When using a fire extinguisher, aim at the top of the fire. The chemical in the extinguisher will
fall and put out the flames.
12. T F When heating chemicals in a test tube, heat from the bottom up, aiming the test tube at the
ceiling, and keep the test tube still.
13. T F It is ok to take off my safety goggles if it’s just for a second while I write something down.
14. T F If any chemical makes contact with your eye, wash it immediately at the eyewash station for
fifteen minutes. If you should spill chemicals on your skin, place the affected area under water
immediately.
15. T F Always read through each activity before you begin.
16. T F If you are unsure about any part of the procedure for an experiment, you should figure it out
yourself. Asking the teacher for clarification will result in a lower mark due to lack of preparation.
17. T F It is acceptable to sit during very long experiments.
18. T F It is ok if I don’t know where the lab safety equipment is since I can just ask someone later.
19. T F Be sure to tell your teacher about any accident, broken equipment, or injury that occurs during
class; no matter how minor.
20. T F When working with chemicals, keep pens and pencils away from your mouth.
21. T F In warmer months, it is acceptable to wear sandals during an experiment.
22. T F Determine whether your equipment is cool enough to disassemble by placing the back of your
hand near it.
23. T F Loose-fitting, long-sleeved shirts should be worn during experiments to protect your arms from
burns and chemical splashes.
24. T F If you must retrieve materials during a lab, it is acceptable to leave your Bunsen burner unattended
as long as it is set to a yellow flame.
25. T F To avoid an injury when heating materials, always place a stopper or tight-fitting lid on the
container being heated.
26. T F If a student uses the last of the chemicals in an experiment, it is their responsibility to go into the
storeroom to retrieve an additional quantity of that chemical.
27. T F Always leave your work area clean and dry before leaving the lab and make sure equipment and
glassware is returned clean to its proper place.
28. T F Horseplay is O.K. during a lab as long as no one is getting hurt.
29. T F It is never advisable to place a thermometer in an open flame.
30. T F To cool hot glassware, run cold water over it.
31. T F Class A fires can be extinguished with water.
32. T F Class D fires must be extinguished with water.
33. T F Keep equipment away from the edge of the lab bench.
34. T F If your eye itches while you are working with chemicals, you should rub it with your hands.
35. T F WHMIS stands for warning hazardous materials information symbols.

jhonny

EECS 1019 Study Guide - Midterm Guide: Contraposition

EECS 1019 Full Course Notes

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