Correct Answer: A. 1.6 x 10^-11N

Explanation

F = EQ

1.6 x 10^-19 x 10⁸

= 1.6 x 10^-11N

Correct Answer: C. p ⇒ q

Explanation

The symbolic form for the statement "If Siah is from Foya, then Foya is in Lofa" is:

p ⇒ q

This is read as "p implies q". It means that if p is true, then q must also be true.

In other words, if Siah is from Foya, then Foya must be in Lofa.

Explanation

Matter is made up of molecules which are held together by intermolecular forces which make the molecules to vibrate about their mean positions giving the solids definite shape.

Correct Answer: C. the queen

Correct Answer: B. sweeping reforms of the religious life of his people

Correct Answer: C. Joint venture

Correct Answer: A. Crystallization

Explanation

(a) The functions of an urban centre are: (i) Provision of social amenities. (ii) Information dissemination (iii) Diffusion of ideas and innovations.

(iv) Recreational/Tourism. (v) Provision of higher order services (x) Educational. (xi) Industrial. (xii) Commercial. (xiii)Administrative/Political.

(xiv) Provision of employment.

(b) The problems of urbanization are: (i) Traffic congestion. (ii) Growth of slums and ghettos (iii) Unemployment /underemployment.

(iv) Overcrowding. (v) Housing congestion. (vi) High crime rate (vii) Increase in social vices. (viii) Environmental pollution.

(ix) Poor sanitation. (x) Political and social unrest. (xi) Spread of diseases and epidemic. (xii) High cost of living/Inflation.

(xiii) High crime rate. (xiv) Pressure on agricultural land. (xv) Increase in government expenditure

(c) The solutions to the problems of urbanization are: (i). Public enlightenment on pollution. (ii) Rapid industrialization.

(iii) Construction of housing. estates.

(iv) Improved security.

(v) Effective waste management. (vi) Introduction of modern farming techniques.

(vii) Price control measures. (viii) Urban renewal, (ix) Development of new towns.

(x) Employment generation / poverty alleviation measures. (xi) Establishment of diversified means of transport.

(xii) Provision of social amenities. (xiii) Enforcement of laws on sanitation. (xiv) Increase in governmental budgetary provisions.

Explanation

(a)Importance of agriculture to the economy of West Africa

• Source of food;
• Source of income;
• Source of employment;
• Provides market for industrial goods such as agrochemicals, machines;
• Provides raw materials for industries e.g. textile industry;
• Provides means of foreign exchange/revenue;
• Source of medicinal herbs;
• Source of materials for shelter;
• Facilitates rural development/social amenities;
• Provision of facilities for recreation and tourism.

(b)Disadvantages of sources of farm power

(i)Internal combustion engine

• It is very expensive to maintain;
• Smoke from engines pollute the air;
• Heavy machine compacts the soil;
• Expensive to purchase;
• Requires much technical know-how to operate and maintain;
• It depends on fuel which may not be readily available.

(ii) Electricity

• Its supply is erratic;
• Could be dangerous if not properly/carefully handled;
• High cost of installation/maintenance;
• It cannot be widely used in field operations;
• Could cause fire outbreak;
• It requires technical know-how.

(iii)Wind

• Its supply is erratic/uncertain/cannot be controlled
• Its use is limited to certain farm operations
• It cannot be stored
• High technical expertise to harness/maintain;
• Noise pollution.

(c)Operations that could be carried out in poultry production through the use of

electrical power

• Hatching of eggs - Debeaking
• Defeathering/plucking of feathers - Automated feeding
• Incubation

Correct Answer: Hon. Tajudeen Abass