Correct Answer: A) commercial banks

Explanation

The correct answer is Option A: commercial banks.

Commercial banks are financial institutions that provide various services to individuals and businesses, including accepting deposits, granting loans, and offering other financial products. One of the services they provide is the discounting of bills of exchange.

A bill of exchange is a written order from one party (the drawer) to another party (the drawee) to pay a certain amount of money to a third party (the payee) on a specified date. When a business or individual needs immediate funds, they can take their bill of exchange to a commercial bank and have it discounted.

Discounting a bill of exchange means that the bank will pay the bill's value to the holder in advance, deducting a certain percentage as commission or interest. The bank then collects the full amount from the drawee when the bill matures.

By discounting bills of exchange, commercial banks help businesses and individuals access funds quickly and provide liquidity to the economy. It is an important function of commercial banks in facilitating trade and commerce.

To learn more about this topic, please read the relevant sections of the recommended textbooks.

Correct Answer: C. Straight slope

Correct Answer: B. increased prices of goods and services

Correct Answer: C. contentment

Correct Answer: D. 9\(\sqrt{3m}\)

Explanation

tan 30\(^o\) = \(\frac{h}{27}\)

h = 27 tan 30\(^o\)

= 27 x \(\frac{1}{\sqrt{3}}\)

= \(\frac{27}{\sqrt{3}}\) x \(\frac{\sqrt{3}}{\sqrt{3}}\)

= \(\frac{27 \sqrt{3}}{3}\)

= 9\(\sqrt{3m}\)

Correct Answer: A. volume of her oil revenue

Correct Answer: D. flexible

Explanation

Flexible Constitution is a constitution that is not defined or set apart in a distinct document and that is not distinguishable from other law in the way in which its terms can be legislatively altered. A flexible constitution can be easily amended when need rises

Explanation

(a)(i) In nuclear fission reaction results in splitting a heavy nucleus into two parts of nearly equal masses while in nuclear fusion process two light nuclei combine together to form a heavier nucleus.

(ii) Nuclear fission releases less energy per nuclear while nuclear fusion releases more energy per nuclear.

(iii) Nuclear fission can take place at room temperature while nuclear fusion takes place at very high temperature.

(ii) Peaceful uses of atomic energy are:

- Production of laser beams

- Production of x-rays

- Production of energy in discharge tubes.

(b)(i) The neutrons produced as a result of fission of a nucleus can cause further fission if they strike other nuclei. This rapid multiplication of a fission process by fissile neutrons is called chain reaction.

(ii) (i) Conditions necessary for chain reaction to occur are:

- The mass of fissile material must exceed the critical mass

- In addition to the two nuclei produced during the fission, one to three neutrons must be produced per parent nucleus.

(ii) Components in a nuclear reactor used to control chain reactions are;

- Boron steel

- Heavy water or denterium oxide

- Graphite or carbon rod.

(c)(i) The type of nuclear reaction is fusion.

T\(_{\frac{1}{2}} = \frac{0.693}{\lambda}\); \(\lambda = \frac{0.693}{T_{\frac{1}{2}}}\)

= \(\frac{0.693}{5.40 \times 10^{3}}\)

= 1.28 x 10\(^{-4}\)S\(^{-1}\)

Explanation

Weathering is the breaking down of rock masses (rock minerals) into simpler forms through the agents of physical, chemical and biological processes. (a)(i) Types of weathering include: (i) Physical weathering (ii) Chemical weathering. (b) Factors which influence weathering are: 1. Climatic factors: (a) Temperature (b) Rainfall/ Water (c) Wind. 2. biological factors / Living organisms: (a) Man (b) Plant (c) Animals 3. Topography 4. Parent Materials 5. Time.

1. Climate: (a)Temperature: (i) changes in temperature bring about cracks in rocks. (ii) these differences in temperature cause aggregates onerals of which rocks are made up to expand to varying degrees since they have different coefficients or expansion. The rocks are stressed, hence peeled and cracked.

b. Rainfall/Water: (i) when water falls on rocks in form of rain, it moves or transports weathered rock and rock particles down the ground, thereby, exposing unweathered part of the rock to other agents. e.g. temperature changes for further weathering. (ii) The rock particles carried down the rok sides by rainwater are abrassive, thereby, causing mechanical breakdown of rock surfaces which carried along with it rain water down the drain. (iii) in temperate countries and other areas with temperate climate, ice is formed in cracks from water collected in such cracks. Since water increases in volume when it freezes, the ice serves as a wedge, thereby, widening the cracks, and cause promoting rock disintegration. (iv) water dissolves minerals in rocks, thereby, causing weathering. (v) involves the attachment of water molecules to the substance or chemical compound being attacked. This may lead to the weakening of the rock mineral concerned, and in turn, weaken the rock which contains that minerals: leading to its breakdown. Wind is more active in arid regions. (1). It also carnes rock particles which collides against each other, thereby causing abrassions and chipping off of particles

2. Biological factors or living organisms: (i) activities of man e.g.in road construction, mining, farming breakdown rocks physically. (ii) plants contribute immensely to weathering of rocks through their roots. (iii) roots of trees and shrubs growing by the side of rocks or on the rocks, penetrate into cracks in the rocks. These widen and break-down the rocks. (iv) plants' roots exude certain susbtances or chemicals which cause the dissolution of rock minerals. (v) burrowing animals, e.g. earthworms, rodents, e.t.c. cause weathering by their activities.

3. Topography: (i) the gradient of the land affects the velocity of the running water or ice on the rock. (ii) this affects the rates, the force ( pressure) of collision of these particles when they are moved or transported from their original position.

4. Parent Materials: (i). the type of parent material affects the rate of weathering. (ii) softness/hardness of the material affects the rate of weathering.

5. Time: (i) the longer the rocks are exposed to weathering processes, the more the rock will weather

Correct Answer: B. 3

Explanation

23 x 54 = 1242

In mod 7;

1242