Correct Answer: A. age structure of the population

Correct Answer: D. general acceptance

Explanation

The most distinctive attribute of money is its widely acceptance as a means of final payment for goods and servicesby all.

Correct Answer: D) 4.25 x 10⁶ Nm^-2

Correct Answer: D. Jesus be cursed

Correct Answer: (d)abattoir

Explanation

(a)(i) An echo is a reflected sound.

(ii) Echoes can be used to:

- Determine the speed of sound in air.

- Determine the depth of a sea bed.

- Locate the positions of shoals of fish.

- Echo sounding is used in mineral prospecting.

(iii) Padding absorbs sound and minimizes reflections at the walls, floors or ceilings. This helps to minimize the effects of echoes.

(b)(i) Timbre is the characteristic quality of a sound produced by a particular voice or instrument. Timbre of the note is pure and it comes out unaccompanied by undesired notes. Overtones are sound notes which accompany the fundamental notes.

(ii) Resonance is said to occur whenever a particular body or system is set in oscillation at its own natural frequency as a result of impulses received from some other system which is vibrating with the same frequency.

(c) Let S\(_1\) = distance i between the ship and the cliff in the first instance

\(\frac{2S}{12}\) = 340; S\(_1\) = 2040m

In the second instance \(\frac{2S_2}{8}\) = 340

S\(_2\) = 1360m

Distance travelled by ship in 2.1 minute S\(_1\) - S\(_2\)

= 2040 - 1360 = 680m

Ship velocity V = \(\frac{680 }{2.1 \times 60}\) = 5.4ms\(^{-1}\)

Correct Answer: B. expandable lungs

Explanation

One can hardly talk about Aunty Ifeoma and Papa-Nnukwu without mentioning Eugene. Despite being brother and sister, the two have very different outlooks on life Eugene, because of his nature, has given up on his father, whom he considers to be hell-bound. Because of this conviction, Eugene will have as little as possible to do with his father.

Aunty Ifeorna, on the other hand, is fanatically devoted to their father, never once missing an opportunity to come to his defense. Several times she has told Eugene that labeling the old man as heathen is erroneous: if Papa-Nnukwu is not Catholic, he is a traditionalist not a heathen.

Aunty Ifeoma adores her father, whom she is careful to include in their Christmas sightseeing. She listens to his stories no matter how many times he has told them. There is a special intimacy between the old man and his daughter. Papa-Nnukwu on his part loves his daughter deeply. He respects her tenacity as a single mother in their kind of society. She is permanently in his prayers. Papa-Nnukwu prays for his daughter-that her circumstances may turn around.

Petrol is in short supply when Papa-Nnukwn's health fails. Thanks to Father Amadi

Correct Answer: D. Level of tax payable

Correct Answer: A. The electrons in both the 2s and 2p orbitals are equivalent