Explanation

(a) Ageostrationary satelite: is an artificial satellite whose period of revolution is equal to the period of rotation of the Earth.

OR

A satellite whose period of revolution is equal to 24 hrs/ 1 day.

(b) Types of lasers

i. Gas

ii. Solid state

iii. Semi-conductor

iv. Liquid

v. Chemical

vi. Fibre

Correct Answer: C. erect and bigger than the object

Explanation

Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.

Correct Answer: D) caryopses

Explanation

In Biology, fruits can be classified into different types based on their characteristics. One-seed fruit is a type of fruit that has only one seed within it. In some cases, the pericarp (the outer layer of the fruit) and seed coat (the protective layer covering the seed) may fuse together to form a single structure. This type of fruit is known as a caryopsis. The question is asking which of the given options is the correct name for a one-seed fruit in which the pericarp and seed coat have become fused together. Based on the options, the correct answer is Option D, caryopsis. It is important to note that other types of fruits exist, such as drupes, legumes, samaras, and achene. These fruits differ in their characteristics and can be identified by their unique features. For example, a drupe is a fruit that has a fleshy outer layer and a hard inner layer surrounding the seed, while a legume is a fruit that splits open along two sides to release seeds. Overall, caryopses are one-seed fruits in which the pericarp and seed coat have become fused together, and are commonly found in grasses such as corn and wheat.

Correct Answer: A. maintain law and order

Explanation

The Primary functions of The Government are to maintain order,settle conflicts,and protect the community. The Government guides us by setting policies, budgets and interact with other communities. They also provide help that certain people cant address independently.

Correct Answer: B) segmentation

Explanation

The correct answer is Option B: segmentation.

Market segmentation is an important concept in marketing. It involves breaking down a larger market into smaller segments or groups based on common characteristics such as age, gender, income, or geographic location. This helps businesses to better understand and target specific customer groups with products or services that meet their specific needs and preferences.

By segmenting the market, businesses can develop more effective marketing strategies and tailor their products or services to meet the specific demands of each segment. This allows them to better serve their customers and gain a competitive advantage in the market.

For example, a clothing company may segment their market into different age groups, such as teenagers, young adults, and middle-aged individuals. They can then create clothing lines that cater to the fashion preferences and styles of each age group. This targeted approach can help the company attract and retain customers within each segment, leading to increased sales and customer satisfaction.

In summary, market segmentation is the process of dividing a market into smaller segments based on common characteristics, allowing businesses to better understand and meet the specific needs of different customer groups.

Correct Answer: B. Infants

Explanation

(b)(i)Two main functions of the ear are:

Hearing and maintenance of balance.

(ii) The mechanism involved in hearing are;

1. The pinna; collects sound waves in the air, concentrates them and passes them on through the external auditor) canal or meatus.
2. The waves; cause the tympanic membrane or ear drum to vibrate. The vibrations are passed on to the ear ossicles (mallens, inclus and stapes) which amplify them.
3. The round oval window;fenestral oval is rotunda also vibrates, passing the waves into the cavity of the inner ear, cochlea, where the perilymph vibrates, transmits the waves in the cochlea which also causes the endolymph of the cochlea to vibrate. The vibrations are then transmitted across the organ of cot or sensory nerve cell or basilar membrane.
4. The impulses;are set up and they stimulate the auditory nerve cells which then transmit the impulses to the brain, for interpretation.

The mechanisms involved in the maintenance of balancing are as follows:

Head movement in any direction affects the fluid or endolymphy, in the corresponding semicircular canals, which are at right angles to each other. This forces the sensory cells, gelatinous copula in the ampulla, to set up impulses through the auditory nerve to the brain and intern, for interpretation. The brain relays the impulses to the body muscles, for balancing/ determine the position of the body.

Correct Answer: D. \(CH_3COOCH_2CH_3 + H_2O ?H^+? CH_3COOH + CH_3CH_2OH\)

Explanation

The hydrolysis of an alkanoate is the reaction of an alkanoate with water to form a carboxylic acid and an alcohol. The correct reaction is:

\(CH_3COOC_2H_5 + H_2O ?H^+? CH_3COOH + CH_3CH_2OH\)

Correct Answer: A. 60°

Explanation

In a polygon with n sides, the sum of the angles =

(n - 2)180, where n = the number of sides.

In our problem, n = k.

So, we have:

(3k - 10)90 = (k - 2)180

270k - 900 = 180k - 360

Simplifying:

90k = 540

k = 6. So, we have a regular hexagon.

Now, each exterior angle = 360/n

We have: 360/6 = 60

Conclusion: Each exterior angle is 60 degrees.

Correct Answer: B. Ieeadiation of gamma rays