Answer:
Total time = 190 ms
Explanation:
The requests missing in question are:
Requests ( A, 80) , (B,75) , (C,82) , (D,90) , (E,45)
Number of movements = | 70 - 45 | + | 45 - 0 | + | 0 - 75 | + | 75 - 80 | + | 80 - 82 | + | 82 - 90 |
= 35 + 45 + 75 + 5 + 2 + 8
= 70 + 80 + 10
= 160
Time taken for seek = 160 * 1 ms = 160 ms
Time taken for servicing request = Number of tracks * Time for each track = 5*6 = 30
Total time = 160 + 30 = 190 ms.
Answer:
The intersection of rows and columns in a worksheet is called a cell
Answer:
Refer to the illustration below to answer the following questions. Use the drop-down menus to make your selections.
Left: A table titled Table 1: Students with entries Student I D Number, Name, Grade. Right: A table titled Table 2: Courses with entries Course I D Number, Course Name, Student I D Number.
What is the primary key in Table 1?
✔ Student ID Number
What is the primary key in Table 2?
✔ Course ID Number
What does Student ID Number refer to in Table 2?
✔ the foreign key
What forms the link between Table 1 and Table 2?
✔ Student ID Number
Explanation:
The term "net radiation" refers to <span>the difference in amount of incoming and outgoing radiation the total amount of energy received by earth.
</span>
<span>Energy comes from the sunlight penetrates the top of the
atmosphere- that's the incoming energy. Then some of it is lost by reflection of clouds
or the Earth's surface, thermal radiation- that's the outgoing energy.</span>