(a) State the three characteristics of sound and the factor on which each of them depends.

(b) Explain resonance as applied to sound.

(c) What role does echo play in the construction of a concert hall?

(d) The surface of an ear drum (assumed circular) has a radius 2.1 mm. It resonates with an amplitude of 0.8 x 10\(^{-7}\) in as a result of impulses received from an external body vibrating at 2400 Hz. If the resulting pressure change on the ear drum is 3.6 x 10\(^{-5}\) NM\(^{-2}\), calculate the:

(i) period of oscillation;

(ii) velocity;

(iii) acceleration;

(iv) force. [\(\pi\) = 3.14 ].

According to the letter of Paul to the Romans, sin reigned in death, while grace reigned through righteousness to_______________

• A. Salvation
• B. Eternal Life
• C. Eternal Peace
• D. Eternal Joy

Democracy can promote national development

• A. good governance
• B. promotion of culture
• C. immunity for leaders
• D. registration of parties

Share premium can be used to?

i. write off discount on shares

ii. give loans to directors

iii.pay dividends

iv. pay company's formation expenses.

• A. i and iv only
• B. i and iii only
• C. ii and iii only
• D. iii and iv only

A constitution of any country is basically___________

• A. a mere piece of paper
• B. a guide to how the country should be governed
• C. a document stating what the leaders should do
• D. a document stating how to acquire power

A plant-like feature in Euglena is the

• A. pellicle
• B. pigment spot
• C. large spot
• D. gullet

Effective demand in economics means

• A. the desire for a commodity
• B. a proposal to purchase a good on credit
• C. the desire for a commodity or service backed by purchasing power
• D. an irrevocable instruction to the seller to meet up the need of the buyers

The oldest system of agriculture in Nigeria which now survives only in very remote areas is?

• A. mixed farming
• B. shifting cultivation
• C. marketing gardening
• D. bush fallowing

Using the force displacement diagram shown below. Calculate the work done

• A. 2000J
• B. 1000J
• C. 20J
• D. 5J

From the venn diagram below, the shaded parts represent

• A. (P∩Q)∪(P∩R)
• B. (P∪Q)∩(P∩R)
• C. (P∪Q)∪(P∪R)
• D. (P∩Q)∪(P∪R)