Correct Answer: C. storage

Explanation

The last cycle of data processing where data and information are preserved for future use is called 'storage'. This is the phase where data or information is saved either temporarily or permanently for future use. The 'output' is the result of data processing but not necessarily preserved for future use. 'Processing' is the action of manipulating data. 'Record' is a piece of stored information.

Correct Answer: D. became suspicious

Correct Answer: B. Tourism

Explanation

How a person determines his or her political beliefs is called political socialization. Tourism is an agent of political socialization process that can shape the way people build their political beliefs

Correct Answer: C. Fiscal policy

Correct Answer: A. extraction of resources in their raw states

Correct Answer: C. N3,200

Explanation

(a) If a stable element is bombarded by \(\alpha\) - particles the nucleus will become unstable and decay into other elements with the release of energy.

Example; \(^{14}_{7}N + ^4_2He \to ^{17}_8 O + ^1_1H\) + Energy

(b) When the nucleus of Uranium is bombarded with a neutron, it splits into two nearly equal parts with a release of energy and neutrons. These excess neutron, if not controlled, further bombard the remaining nuclei, causing a chain reaction and consequently an explosion, provided the critical mass of the Uranium is, exceeded

\(^{235}_{92}U + ^1_0U \to ^{236}_{92}U \to ^{141}_{56}Ba + ^{92}_{36}Kr + 3^1_0n\) + Energy

(c)(i) Radioactive substances give off identifiable radiation i.e \(\alpha, \beta\) and 8 radiations

(ii) They are chemically identical to their non-radioactive counterparts and later can be made radioactive by bombardment with nuclear particles

(iii) Radioactive materials decay with specific half-life.

(d) Three applications of atomic energy

(i) It is used for the production of nuclear weapons for warfare

(ii) It is used in the generation of electric power

(iii) It is used to detect leakages in underground pipes carrying oil or gases.

(e) Two Postulates of Bohr's Model of the Atom:

(i) Electrons occupy certain fixed orbits around the nucleus of an atom. When an electron is in one of these orbits it does not radiate any energy

(ii) The angular momentum is quantized in the allowed orbit.

Two Limitations To Bohr's Model:

(i) It could not interpret the details of the spectra of complex atoms

(ii) There is no theoretical basis for selecting the allowed orbits postulated.

Explanation

\(\overline{PQ}\) = \(\begin{pmatrix} 1 \\ 3 \end{pmatrix}\) - \(\begin{pmatrix} 4 \\ -5 \end{pmatrix}\) = \(\begin{pmatrix} -3 \\ 8 \end{pmatrix}\)

\(\overline{MR}\) = \(\begin{pmatrix} -5 \\ 2 \end{pmatrix}\) - \(\begin{pmatrix} x \\ y \end{pmatrix}\) = \(\begin{pmatrix} -5 & -x \\ 2 & - y \end{pmatrix}\)

\(\begin{pmatrix} -3 \\ 8 \end{pmatrix}\) = \(\begin{pmatrix} -5 & -x \\ 2 & - y \end{pmatrix}\)

⇒ -5 - x = -3; x = -2

⇒ 2 - y = 8; y = -6

The coordinate of M (-2,-6)

(b) \(\overline{PM}\) = \(\overline{OM}\) - \(\overline{OP}\)

= \(\begin{pmatrix} -2 \\ -6 \end{pmatrix}\) - \(\begin{pmatrix} 4 \\ -5 \end{pmatrix}\) = \(\begin{pmatrix} -6 \\ -1 \end{pmatrix}\)

\(\overline{PQ}\) = \(\overline{OQ}\) - \(\overline{OP}\)

= \(\begin{pmatrix} 1 \\ 3 \end{pmatrix}\) - \(\begin{pmatrix} 4 \\ -5 \end{pmatrix}\) = \(\begin{pmatrix} -3 \\ 8 \end{pmatrix}\)

|\(\overline{PM}\)| = √(-6\(^2\) + [-1\(^2\)]) = √37

|\(\overline{PQ}\)| = √(-3\(^2\) + 8\(^2\)) = √73

cosØ = \(\frac{PM.PQ}{|\overline{PM}||\overline{PQ}|}\)

cosØ = \(\frac{[-6i - j].[-3i+8j]}{√37 . √73}\) = \(\frac{10}{√2710}\)

⇒ Ø = cos\(^{-1}\) \(\frac{10}{√2710}\)

: Ø = 78.91° ≈ 79°

Correct Answer: D. vaccination

Correct Answer: C. \(\frac{22000}{3}\)km