Correct Answer: B) 222

Explanation

The given nuclear reaction involves the decay of a radium (Ra) isotope into a radon (Rn) isotope and an alpha particle (?). In this type of decay, an unstable nucleus emits an alpha particle, which consists of two protons and two neutrons.

In the reaction, the radium isotope is represented as \(^{226}_{88}Ra\), where 226 is the mass number (total number of protons and neutrons) and 88 is the atomic number (number of protons). The radon isotope is represented as \(^{x}_{86}Rn\), where x is the mass number we need to determine, and 86 is the atomic number.

An alpha particle (?) consists of 2 protons and 2 neutrons, so its mass number is 4, and its atomic number is 2. When the radium decays, the mass number and atomic number must be conserved, meaning the sum of the mass numbers and atomic numbers on both sides of the reaction must be equal.

For mass numbers:

\(226 = x + 4\)

To find the value of x, subtract 4 from 226:

\(x = 226 - 4\)

\(x = 222\)

So, the value of x in the nuclear reaction is222, makingOption B the correct answer.

Correct Answer: C. 8√2km

Explanation

\(x^2 = 8^2 + 8^2\)

\(x^2 = 64 + 64 = 128\)

\(x = \sqrt{128}\)

= \(8\sqrt{2}\) km

Correct Answer: D. scanty

Correct Answer: D. Sugar tongs

Explanation

a) First method 4.

Total number of pages = 50

Total number of lines per page = 16

Total number of bits per line = 24,000 bits

Total number of bits in a byte: 8 bits = 1 byte

On each page, there are: 2400 x 16 bytes = 48,000 bytes/page

For 500 pages, there are: 48,000 x 500 bytes

Conversion to Kilobyte = 24000000/1024 = 23437.5KB

Conversion to Megabyte = 23437.5/1024 = 22.89MB

The space occupied in megabyte is 22.89

Second method:

Total number of pages = 500

Total number of lines per page = 16

Total number of bits per lines = 24,000 bits

Total number of bits in a byte: 8 bits = 1 byte

A line in bytes = 24000/8 = 3000 bytes

16 lines = 16 x 3000 bytes = 48000 bytes

1 page in kilobytes = 48000/1024 = 46.875KB

Total space occupied = 500 x 46.875KB = 23437.5KB

Since 1024KB = 1MB

Then total space Occupied in Megabyte

23437.5KB /1024 = 22.8882MB

(b) Auxiliary Storage Hard disk / Hard drive, Compact Disc (CD), Digital Versatile Disc (DVD), Magnetic Tape, Floppy Disk/ Diskette, Pen Drive Flash Drive, Blue ray disk, Memory card or SD-card, Zip drive, Sim card.

(c)(i) Two main types of computer software System Software, Application Software.

(ii) Examples of System Software

1. Operating system: MS windows, Linux, Unix, Mac OSX, DOs, IOS, Novel.

2. Utility software: Virus scanner/ Anti-virus, Disk fragmenter, System monitor, File manager, Device driver, Disk cleaner.

3. Linker.

4. Language translator:Assembler, Interpreter and Complier

Examples of Application Software 1. Specialized software: Application Payroll Program Education Management Software, Accounting Soft- ware, Statistical Software, Web Design Software (e.g Facebook, Skype), etc.

2. Application packages: Microsoft office suite, Word processing, Graphics software, Game software, Database software, Spreadsheet software, Steam software (game), etc.

Explanation

The poet, in acknowledging human frailty vis-a-vis the inviolability and immortality of the could, sends it a an errand to defend the truth against human lies and machinations in all places, high and low. Everywhere, doing the wrong thing holds sway and prevention is rife. Thus the errand involves speaking against the perversion of intellectual, Moral, emotional and other forms of human behaviour.

The poet is mainly worried that institutions uphold the reverse of the fundamental values of their existence. Religious and secular institutions as well as ethical values come up for censure. These include Courts, the Potentates, The Church, Honour, Love and Beauty. On his deathbed, he asks the should to pay visits to each and every one of these perverters. While out at it he must "give the world the lie" as nothing is done right anywhere in the world. The repetition of the line "give the world the lie" acts as a refrain and highlights the poet's preoccupation.

That his concept of morality and living right is not easy to uphold is not lost on the poet. He is aware that facing the truth can be a bitter experiment; telling it, even more so. The bearer of the message of truth may be threatened with death "to give the lie/Deserves no less than stabbing".

However, it is comforting that the soul has the advantage of immortality and will definitely come out unhurt: "No stab the soul can kill".

Correct Answer: A. Abraham

Correct Answer: D. useful

Correct Answer: C. The foundation of their hope of salvation is in Christ's resurrection

Correct Answer: D. Rr x Rr