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iogann1982 [59]
2 years ago
12

Do u have all the subjects​

Computers and Technology
2 answers:
natka813 [3]2 years ago
8 0
What subjects? Brainly subjects?
Gnom [1K]2 years ago
6 0

Answer:

yes I do have alllll the subjects

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3.A ball is thrown into the air with an initial velocity of 15 m/s. a.How long does it take the ball to reach maximum height?b.W
ehidna [41]

Answer:  a) = 1.5 sec.  b= 11.5 m. c=0  d= 1.5 sec.

Explanation:

a) Once thrown into the air , the only influence on the ball is gravity, so, we can conclude that the acceleration acting on the ball is the one due to gravity, i.e., g= 9.8 m/sec².

Applying the definition of acceleration, we can write the following equation:

a= (vf-vo) / t   ⇒ g = vf-vo / t. (1)

Now, when the ball reaches to his maximum height, it stops momentarily, and then starts to fall, so for this height, we can write vf=0.

Replacing  in (1), and solving for t, we get:

t = (0 -vo) / g = -15 m/s/ - 9.8 m/sec² (Taking upward as positive  direction)

a) t= 1.5 sec.

Replacing this value in the kinematic equation for displacement, when vo=15 m/s, we get:

hmax: 15 m/sec . 1.5 sec -1/2. 9.8 m/sec². (1.5 sec) ² (2)

b) hmax= 11.5 m

c) vf= 0 (as explained above)

Finally, in order to know how long the ball takes to return to its initial height, we know that for the falling part of the trajectory, vo=0, so we can write the equation for displacement as follows:

h=-hmax (because it returns to the same starting point)= 1/2 gt²=-11.5 m

Solving for t, we get:

d) t=1.5 sec.

It can be seen that the time used in going up, it is the same for going down, to travel the same distance.

This result is completely general and applies to any free fall problem.

3 0
3 years ago
Which file contains full and incremental back-up information for use with the dump/restore utility?
Ivahew [28]

The file that contains full and incremental back-up information for use with the dump/restore utility is <u>/etc/dumpdates.</u>

<u></u>

<h3>What is dump/restore utility ?</h3>

Dump examines files in a filesystem, determines which ones need to be backed up, and copies those files to a specified disk, tape or other storage medium. Subsequent incremental backups can then be layered on top of the full backup.

The restore command performs the inverse function of dump; it can restore a full backup of a filesystem. Single files and directory subtrees may also be restored from full or partial backups in interactive mode.

Learn more about incremental backups

brainly.com/question/5849057

#SPJ4

3 0
1 year ago
Who is the father of computer?​
bagirrra123 [75]

Answer:

The first automatic digital computer has been designed by the English mathematician and inventor Charles Babbage. Babbage developed the Analytical Engine Plans for the mid-1830s.

Explanation:

  • Babbage has developed the concept of a digital, programmable computer and was a mathematician, philosopher, inventor, and mechanical engineer.
  • Some regard Babbage as a "computer father"
  • The inventing of its first mechanical computer, the difference engine, is attributable to Babbage, which eventually resulted in more complex electronic designs, although Babbage's Analytical Engine is the main source of ideas for modern computers. He was described as the "prime" among the numerous polymaths of his century by his varied work in another field.
7 0
2 years ago
Imagine that you need to be late to work next Thursday because of a doctor's appointment. Compose your own e-mail appropriate fo
ratelena [41]
In form your boss a week early
8 0
3 years ago
Remember that kid who would always ask you for your food, even though he packed his own lunch.
Verizon [17]

Answer:

ye ye

Explanation:

7 0
3 years ago
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