Correct Answer: D. TT and Tt

Correct Answer: C. rate of turnover

Correct Answer: C. 16.5

Explanation

The third quartile can be found in the \((\frac{3N}{4})^{th}\) position

= \((\frac{3 \times 100}{4})^{th}\) position

This is found in the class 14 - 16.

The upper class boundary = 16.5

Correct Answer: c. Image

Correct Answer: D. soilage.

Explanation

(a)

∑ clockwise moments = ∑ anti-clockwise moments

= 3 x mJ + 4 x 15 = 60 x 2

= 3mJ + 60 = 120

= 3mJ = 120 - 60

= 3mJ = 60

\(∴mJ=\frac{60}{3}=20kg\)

(bi)

\(∑f_y=0==>N-mgcosθ=0\)

\(=N-12(10)cos30^o=0\)

\(=N=120cos 30^o\)

\(=N=60√3N\)

At the point of moving down,

\(∑f_x=0==>μN-P-mgsinθ=0\)

\(=\frac{2}{3}(60√3)-P-12(10)sin30^o=0\)

\(=40√3-P-60=0\)

\(=P=40√3-60\)

\(∴P=9.28N\)

(bii)

\(∑f_y=0==>N-mgcosθ=0\)

\(=N-12(10)cos 30^o=0\)

\(=N=120 cos 30^o\)

\(=N=60√3N\)

At the point of moving up,

\(∑f_x=0==>P-μN-mgsinθ=0\)

\(=P-\frac{2}{3}(60√3)-12(10)sin30^o=0\)

\(=P-40√3-60=0\)

\(=P=40√3+60\)

\(∴P=129.28N\)

Explanation

(a) Unemployment of labour is a situation where individuals in the labour force who are willing and able to work at the existing wage rate cannot find jobs.

(b)(i)Frictional unemployment– this form of unemployment exists as workers search for jobs of their choice having left their previous jobs or when school leavers enter the labour market from school e.g. a fresh graduate who has completed school and is looking for a job.

(ii)Structural unemployment – this form of unemployment occurs when there are changes in the pattern of demand or production resulting in labour lay-off. A change in technology can also result in structural unemployment. e.g. if an organization begins to use computer, a stenographer who can only type using the traditional typewriter will become unemployed.

(iii)Seasonal unemployment – This form of unemployment occurs when there is a fall in demand for a certain product at a particular time of the year e.g. during the rainy seasons, masons become unemployed and sellers at the school canteen become unemployed during vacation.

(c)(i) The seasonal nature of some jobs e.g. farmers become unemployed during the dry season and masons during the wet season.

(ii) Inadequate education and skills due to termination of education after the basic level and non – acquisition of skills, make people unable to enter certain professions.

(iii) If plants and machinery installed are under – utilized due to inadequate raw materials, poor power supply and limited market, unemployment will arise.

(iv) Urbanisation: a drift of people from the rural to urban centres due to neglect of agriculture creates unemployment.

(v) Advancement in technology can lead to unemployment if the skills of labour are not upgraded.

(vi) If population grows rapidly, surplus labour which cannot be absorbed by the economy will be unemployed.

(vii) If people lack information about the job market, they will be unemployed because they may not be aware of job opportunities elsewhere.

(viii) Government policies like retrenchment, privatization of state enterprises and poor development plans can lead to unemployment.

(ix) If the level of government expenditure increases but is not geared towards investment, there will still be unemployment.

(x) Adoption of labour-saving devices or capital- intensive method of production can lead to unemployment.

(xi) Inappropriate educational curriculum resulting in the non-acquisition of relevant skills for the labour market leads to unemployment.

Correct Answer: C. Portuguese

Explanation

Portuguese gave the name Sierra Leone (Lion Mountains) to the current Sierra Leone.

Correct Answer: C. Action

Correct Answer: D. fogs