Correct Answer: D. soaking

Correct Answer: D. air or by road

Explanation

The best answer is D. air or by road.

Here's why:

• by air is the correct way to say you're traveling by plane.

• by road is the correct way to say you're traveling by a land vehicle (car, bus, etc.) on roads.

Let's look at the other options:

• A. with lorry is grammatically incorrect. You would say by lorry or in a lorry.

• B. by aircraft is technically correct but by air is more common and natural for general travel.

• C. by airways is incorrect. Airways refers to the routes or the company, not the mode of travel itself.

Explanation

(a) The characteristics of the following are;

(i) Granite

(i) Granite contains large crystals

(ii) They do not occur in layers or strata

(iii) They do not contain fossils which are the remains of plants and animals embedded in rocks.

Limestone:

(i) Limestone is arranged in layers or stata

(ii) They contain fossils

(iii) The rock is non-crystaline in structure

(iii)Graphite:

(i) Graphite is not crystaline

(ii) It is arranged in layers or strata

(iii) It may contain fossils

(b)(i)Graniteis formed from the cooling and solidification of molten magma ejected from below the earth crust. It cools before reaching the surface of the earth hence granite is called a plutonic or intrusive igneous rock

(ii)Limestoneis formed from the remains of living organisms such as corals or shellfish. These remains have been cemented together under the influence of water to form organic sedimentary rock

(iii)Graphite is formed from pre-existing sedimentary rock called clay which have changed or metamorphosed to a new rock as a result of the influence of heat and pressure. Graphite is an example of metamorphic rock.

Correct Answer: A. the nucleus loses two protons and two neutrons

Explanation

The correct answer is A. the nucleus loses two protons and two neutrons.

An alpha particle (\alpha) is identical to a helium-4 nucleus, consisting of 2 protons and 2 neutrons. Therefore, when a radioactive nucleus undergoes alpha-particle emission, it expels this particle, resulting in:

• A decrease in the atomic number (Z) by 2 (loss of two protons).

• A decrease in the mass number (A) by 4 (loss of two protons and two neutrons).

Correct Answer: C. diminishing marginal utility

Explanation

It shows that when total utility is at the maximum, marginal utility equals zero.

Correct Answer: A. led o rapid rural-urban migration

Correct Answer: A. lycopersicon esculentum

Correct Answer: C. 120

Explanation

In a circular seating arrangement, we fix the position of one person and then rotate the others, so we have

\((6-1)! = 5! = 5\times4\times3\times2 = 120\)

Correct Answer: D. 75%

Correct Answer: C. 3465J

Explanation

Q = ML + MC\(\theta\)

= 10 x 335 + 10 x 2.1 x 5

= 3465J