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nlexa [21]
3 years ago
14

Which of the following would not be considered a polymer?

Computers and Technology
2 answers:
lesantik [10]3 years ago
7 0

The answer is quartz

A polymer is any of a class of synthetic substances composed of huge molecules that are made up of repeating sub-units interconnected together by chemical bonds. They constitute such man-made materials as glass, paper, plastics, rubbers, and glass. Anything plastic is a common example of a polymer.

miskamm [114]3 years ago
3 0
Correct answer would be <span>A) <u>quartz</u></span>.  Plastic, nylon, and rubber can all be broken down or heated to make it expand, and be used in common products.

Hope this helped :)
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Help with some questions. Thank you!
Oksana_A [137]

Answer:

1. E: II and III only

2. A: (int)(Math.random() * (upper − lower) ) + lower

3. A: The value of answer is N

4. E: while( !(userGuess == secretNumber) && numGuesses <= 15 )

5. C: 21

Explanation:

1. Which of the following is equivalent to while(userGuess != secretNumber)?

I. while( userGuess < secretNumber && userGuess > secretNumber)  

NO - This will test until the userGuess is smaller AND greater than the secretNumber, at the same time... so that condition will never be true.

II. while( userGuess < secretNumber || userGuess > secretNumber)

YES - This will test the value of userGuess and see if it's smaller OR greater than secetNumber.  So, it will loop until the user guesses right.

III. while( !(userGuess == secretNumber) )

YES, this will negate the match with the secretNumber.  In order words, if it's not a match, it will return true... so the loop will run until it finds a false condition (a match).

As you can see, only II and III are valid.

2.  If the lower limit were inclusive and the upper limit exclusive, which expression would properly generate values for the secret number?

A: (int)(Math.random() * (upper − lower) ) + lower

Since the lower limit is INCLUSIVE, we mustn't add one to the lower limit.  Also, the Math.random() function returns a value that matches our needs; it returns a value between [0,1[ (meaning the 0 is included, but not the 1).

Assuming the (int) caster does return only the integer portion doing a round down of the result, we'll be perfect.

3. What conclusion can be made about the state of the program when the while loop terminates?

while(!answer.equals( "N"))

{.....

A: The value of answer is N

The condition in the loops reads as "While the negation of the answer being 'N', loop".  If the answer equals 'N' then the method should return true... which will be negated by the '!' operator, causing the condition to be false. Thus we know that if the loop ends, the value of answer contains 'N', any other value will keep the loop going.

4. Assuming numGuesses is initialized to 1, how would the while statement be modified to include an extra criterion limiting the number of guesses to 15?

E: while( !(userGuess == secretNumber) && numGuesses <= 15 )

This modified condition will first test to see if the user has guessed the secretNumber (if he has, the first sub-parenthesis will be true... so the left side of the && operator will be false due to the negation operator.  The right side of the && operator will check to see how many tries have been attempted. Since the counter starts at 1, it needs to go up to 15 inclusively... so the <= is the right comparison operator.

5. After execution of the following code segment, what will be displayed?

int x = 1;

while(x < 18)

{

x += 5;

}

System.out.println(x);

C: 21

The x variable is initialized with 1... then enters the loop, in which it is incremented by 5 at each passage.

So after first passage, x = 6

After second passage, x = 11

After third passage, x = 16

After fourth passage, x = 21

Cannot enter the loop again because 21 > 18.

So, it will print out the value of 21.

3 0
3 years ago
A communications medium that carries a large amount of data at a fast speed is called
babymother [125]
Either Firewire, or an ethernet cable.
7 0
3 years ago
. In testing, what is the role of an oracle?
ikadub [295]

Answer:

The role of test oracle is to determine if a test has passed or failed. Oracle compares the outputs of the system under a  test, for a given test-case input, and the output(s) that should have. A test oracle works on specifying constraints on the output(s) for a set of inputs. An oracle could be:

  • a program which tells if the output is correct.
  • documentation that specifies the correct output for inputs.
  • a human that can tell whether it is correct an output.

5 0
3 years ago
When it comes to collecting and organizing prospect and account​ information, salespeople have a large variety of computer syste
OleMash [197]

Answer:

sales force automation systems

Explanation:

Based on the information provided within the question it can be said that in this scenario these are known as sales force automation systems (SFA). This type of system or software is used in order to automate various business tasks, including managing contacts, order processing, sales, inventory, etc. Which is why it is mostly used by the salespeople.

4 0
3 years ago
Hello! I am a new coder, so this is a simple question. But I am trying to create a code where you enter a number, then another n
slavikrds [6]

no longer returns an error but your math seems to have something wrong with it, always returns 0

Console.WriteLine("Enter a percentage here");

   int Percent = int.Parse(Console.ReadLine());

   Console.WriteLine("Enter your number here");

   int Number = int.Parse(Console.ReadLine());

   int result = Percent / 100 * Number;

6 0
2 years ago
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