Correct Answer: B. demonstration

Explanation

Governments are held accountable if citizens can punish and/or reward the government to influence it to pursue the best interests of citizens. Demonstration can lead to violence causing loss of lives and properties. It isn't a reasonable way of holding one's government responsible and accountable

Correct Answer: C) 2.0

Correct Answer: A. An agent.

Correct Answer: B. 17/1,000

Explanation

0.0425/2.5 = 425/25000 = 17/1000

Correct Answer: B) the valence electrons of the elements in the same period increase progressively 'across the period

Explanation

(a)(i) Coulomb's law of electrostatics

The electrostatic force between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

(ii) Calculation of the magnitude of the electrostatic force

F = \(\frac{kq_{1}q_{2}}{d^{2}}\)

F = \(\frac{9.0 \times 10^{9} \times 1.6 \times 10^{-19} \times 1.6 \times 10^{-19}}{(5.2 \times 10^{-11})^{2}}\)

= 8.52 x 10\(^{-8}\) N

(b)(I) Proof of V\(_{out}\)

Let the current through the circuit be I

V\(_{in}\) = I(R\(_{1}\) + R\(_{2}\))

OR

I = \(\frac{V_{in}}{R_{1} + R_{2}}\)

V\(_{out}\) =IR\(_{2}\)

II. Calculation of R\(_{1}\);

V\(_{out}\) = V\(_{in}\)(\(\frac{R_{1}}{R_{1} + R_{2}}\))

OR

\(\frac{V_{out}}{V_{in}} = \frac{R_{1}}{R_{1} + R_{2}}\)

\(\frac{1}{2.5} = \frac{R_{1}}{R_{1} + R_{30}}\)

R\(_{1}\) = 20\(\Omega\)

(ii) The Volt The unit of potential difference between two points when one joule of work is done in taking one coulomb of charge between the points,

(c) Why wood is not suitable for use as the Core of transformers Wood is a non-magnetic material and would not provide magnetic coupling between the coils for electromagnetic induction.

(d) Applications of cathode ray tube

i. For studying alternating current waveform

ii. For measuring frequency/voltage/ reactance/power factor and resistance of an electronic device

iii. Used to monitor signals/check FM/AM characteristics

Correct Answer: A) collegial

Explanation

A collegial system is one where a group of people share the responsibilities of the executive branch of government. This means that there is no one person who has more power than the others, and decisions are made through discussion and consensus.

In contrast, a parliamentary system has a chief executive, who is usually the leader of the political party with the most support in the legislature. A revolutionary system is one where a group of people overthrow the existing government and create a new one. A republican system is one where the head of state is not a monarch, but is instead elected by the people or by a group of representatives.

Therefore, the correct answer to the question is A, collegial, because it is the only option that describes a system where there is no single person who serves as the chief executive.

Correct Answer: D. normal reaction between the liquid layers

Correct Answer: C. larger surface area

Correct Answer: C) oxygen

Explanation

2CO + O\(_2\) \(\rightarrow\) 2CO\(_2\)

50cm\(^3\) \(\rightarrow\) 25cm\(^3\)

20% \(\times\) 150cm\(^3\)

30cm\(^3\) is the volume of oxygen available for the reactions.

But only 25cm\(^3\) is required, therefore O\(_2\) is in excess.