Myopic defects in the human eye can be corrected through the use of a

• A. Concave Mirror
• B. Concave lens
• C. Prism
• D. Convex lens

Which of the following statement about force is correct ?

• A. electrostatic, gravitational and magnetic forces are always attractive
• B. electric, gravitational and magnetic field obeys inverse square law
• C. fields are real but their corresponding field lines are imaginary
• D. field lines and their corresponding fields are both real

²³₁₁Na + Proton →^p_qX + alpha particle What are the values of p and q respectively in the equation above?

• A. 10 and 20
• B. 12 and 24
• C. 20 and 10
• D. 24 and 12

The electricity meters in houses measure energy unit consumed in

• A. kilowatt-hour
• B. volt
• C. ampere
• D. coulomb

A ball of mass 0.1kg approaching a tennis player with a velocity of 10ms\(^{-1}\),is hit back in the opposite direction with a velocity of 15ms\(^{-1}\). If the time of impact between the racket and the ball is 0.01s, calculate the magnitude of the force with which the ball is hit

• A. 5000N
• B. 500N
• C. 250N
• D. 50N

(a) List two examples each of substances with:

(i) low viscosity;

(ii) high viscosity.

(b) When is a liquid said to be viscostatic?

A swimming pool is 2.1m deep. If it contains water of refractive index 1.3, calculate the apparent depth of pool

• A. 3.4m
• B. 2.7m
• C. 1.6m
• D. 0.8m

A man whose mass is 80kg climbs a staircase in 20s and expends power of 120W. Find the height of the staircase.[g = 10ms^-2]

• A. 1.8m
• B. 2.0m
• C. 2.5m
• D. 3.0m

Two bodies each carrying a charge of 2.00 x 10-10C are 5cm apart. Calculate the magnitude of the force between the charges.[\(\frac{1}{4\pi \mathit{E}_o} = 9.00 \times 10^9 Nm^2C{-2}\)]

• A. 1.44 x 10^-7N
• B. 7.20 x 10^-9N
• C. 7.20 x 10^-11N
• D. 1.44 x 10¹¹N

A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They

• A. expand
• B. collide less often
• C. move more rapidly
• D. contract