Addition of charcoal to the filter bed of sand during water treatment for township supply is to?

• A. prevent goiter
• B. prevent tooth decay
• C. remove odour
• D. kill germs

The elasticity of supply of perishable goods is?

• A. unitary
• B. inelastic
• C. zero
• D. elastic

An entrepreneur who intends to establish a frozen fish shop will need a

• A. reliable power supply
• B. good communication network
• C. good network of road
• D. reliable skilled labour

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?

• A. Translational motion
• B. rotational motion
• C. brownian motion
• D. oscillatory motion

(a) Sketch a diagram of a simple pendulum performing simple harmonic motion and indicate positions of maximum potential energy and kinetic energy.

(b) A body moving with simple harmonic motion in a straight line has velocity, v and acceleration, a, when the instantaneous displacement, x in cm, from its maximum position is given by x = 2.5 sin 0.4 \(\pi t\), where t is in seconds. Determine the magnitude of the maximum (i) veloxity; (ii) acceleration

(c) A mass m attached to a light spiral is caused to perform simple harmonic motion of frequency

f = \(\frac{1}{2 \pi} \sqrt{\frac{k}{m}}\), where k is the force constant of the spring.

(i) Explain the physical significance of \(\sqrt{\frac{k}{m}}\).

(ii) If m = 0.30 kg, k = 30Nm\(^{-1}\) and the maximum position is 0.015m, calculate the maximum;

(i) kinetic energy

(ii) tension in the spring during the motion [g = 10 ms\(^{-1}\), \(\pi\) = 3.142]

When a firm speaker of stock appreciation, it refers to

• A. change in the value of its stocks resulting from price movement
• B. increase in the price of it shared quoted on the stock exchange
• C. an unexpected increase in the demand of its stock
• D. the value of its stock in the stock exchange

An aspect of the Nigerian culture which may be regarded as shirk is

• A. excessive spending at burial ceremonies
• B. worship of ancestors
• C. signing and dancing in public
• D. ceremonies involving social interaction between boys and girls

The term community is defined as

• A. the different groups of plants and animals in the same area and interacting with each other
• B. the consumers and producers living in a habitat
• C. living organisms interacting with physical factors of an environment
• D. animals which mutually derive benefit from their association.

Some of the solid minerals found in Nigeria are?

• A. marble tin and columbite
• B. tin, iron and diamond
• C. tin, diamond and bauxite
• D. uranium, lead and iron ore

If the opening stock of Ali ltd is N40,000, the cost of goods sold is N48,000 and the closing stock is N24,000, its rate of turnover will be?

• A. 1.2 times
• B. 1.5 times
• C. 2.0 times
• D. 7.5 times