(a) Define specific heat capacity.

(b)(i) With the aid of a labelled diagram, describe an experiment to determine the specific heat capacity of copper using a copper ball.

(ii) State two precautions necessary to obtain accurate results.

(c) A piece of copper block of mass 24 g at 230°C is placed in a copper calorimeter of mass 60 g containing 54 g of water at 31°C. Assuming heat losses are negligible, calculate the final steady temperature of the mixture. [specific heat capacity of water = 4200 J kg\(^{-1}\) K\(^{-1}\)] [specific heat capacity of copper = 400 J kg\(^{-1}\) K\(^{-1}\)]

Simplify \((\sqrt{6} + 2)^2 - (\sqrt{6} - 2)^2\)

• A. \(2\sqrt{6}\)
• B. \(4\sqrt{6}\)
• C. \(8\sqrt{6}\)
• D. \(16\sqrt{6}\)

Find the difference between the range and the variance of the following set of numbers 4, 9, 6, 3, 2, 8, 10, 5, 6, 7 where \(\sum d^2\) = 60

• A. 2
• B. 3
• C. 4
• D. 6

Muhammad es Sadek was a 19th century ruler of

• A. Morocco
• B. Libya
• C. Tunisia
• D. Algeria.

The major determinant of cross elasticity of demand is the

• A. price of the good
• B. degree of necessity of the good
• C. level of income of consumers
• D. closeness of the substitutes

Which of the following countries is noted for its problem of population pressure?

• A. Canada
• B. India
• C. Nigeria
• D. Libya

The following factors are essential for maize production except

• A. high temperature
• B. low temperature
• C. relative humidity
• D. adequate rainfall

During a conflict between management and workers, the union's bargaing power is based on

• A. work-to-rule
• B. negotiation
• C. picketing
• D. management decision

Accounts can be classified into

• A. cash and credit transactions
• B. cash and credit accounts
• C. personal and private account
• D. personal and impersonal account

The correct relationship between the displacement, s, of a particle initially at rest in a linear motion and the time, t, is?

• A.s \(\alpha\) t\(^{-2}\)
• B.s \(\alpha\) t\(^{-1}\)
• C.s \(\alpha\) t
• D.s \(\alpha\) t\(^{2}\)