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galina1969 [7]
2 years ago
14

Read the following characteristic:

Computers and Technology
1 answer:
Ivanshal [37]2 years ago
3 0

Answer:

A goal of procedural programming

An advantage of object oriented programming

A disadvantage of object oriented programming

A drawback of procedural programming

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A. Calculate the diffusion coefficient for magnesium in aluminum at 450°C.
SIZIF [17.4K]

Answer:

a) D = 4.88 * 10^(-14) m^2 / s

b)   <em>t </em>= 1.1 hr

Solution:

a) Magnesium in Aluminum diffusion:

D = Do * exp(-Qd / RT)

  =  (1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15)

  = 4.88 * 10^(-14) m^2 / s

D = 4.88 * 10^(-14) m^2 / s

b) The composition remains same at say the distance Xo:

(Cx - Co) / (Cs - Co) = Constant

Xo^2 / D_{550} * <em>t </em>= Xo^2 / D_{450} * 15

D_{550} * <em>t </em>= D_{450} * 15

(1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15) * <em>t</em>

(4.88 * 10^(-14) m^2 / s) * 15

by, solving for <em>t </em>we get:

 <em>t </em>= 1.1 hr

So, the time required is 1.1 hr.

5 0
3 years ago
Write a program that prompts the user to enter an oligonucleotide sequence, such as TATGAGCCCGTA.
Alexxx [7]

Answer:

Explanation:

The following code is written in Python. It continues looping and asking the user for an oligonucleotide sequence and as long as it is valid it outputs the reverse complement of the sequence. Otherwise it exits the loop

letters = {'A', 'C', 'G', 'T'}

reloop = True

while reloop:

   sequence = input("Enter oligonucleotide sequence: ")

   for x in sequence:

       if x not in letters:

           reloop = False;

           break

   if reloop == False:

       break

   newSequence = ""

   for x in sequence:

       if x == 'A':

           newSequence += 'T'

       elif x == 'T':

           newSequence += 'A'

       elif x == 'C':

           newSequence += 'G'

       elif x == 'G':

           newSequence += 'C'

   print("Reverse Complement: " + newSequence)

7 0
3 years ago
How do you find specific words on a web page ...?? I know theres a shortcut for highlighting a specific word on a webpage on fir
aniked [119]
If you are on a desktop computer you can press the top row key "F3" and a little box will pop up and you can type the word you are looking for in there and it will find that word on the page you are on and take you straight to it.
5 0
3 years ago
Why operating system is pivotal in teaching and learning
trasher [3.6K]

Answer:

Without it information flow is impossible

Explanation:

The word 'pivotal' also means crucial or vital, and so we need to consider what an operating system actually does.

Remember, merely having all the hardware of a computer would not allow you to run (install and use) programs. It is by means of an operating system that teaching programs can be installed, and it is also by means of an operating system learning can take place.

For example, a student can decode (learn) instructions/lessons from his teacher via a software program; and the software program needs an operating system to open (run) the program.

6 0
3 years ago
What is the first thing you should do to find a mean and range of data?
KatRina [158]

Answer

To find mean of data add all the numbers in the set of data and divide the sum by the number of addends.

To find range, identify the difference between the highest value and lowest value in the set of data.

Explanation

Mean, mode, median and range are the primary measurements used to get the measures of central tendencies. To get the mean and range; first arrange the data in an ascending order, then identify the highest value and the lowest value in the set. The difference between these two data values gives the range of the set of values. For the mean, add all the set of values and then divide their sum with the number of values in the set of data.


6 0
3 years ago
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