The diagram below illustrates the trajectory of a fired missile from point P at 250 ms-1

If the missile point Q after 40 s, calculate the distance |PQ|

A bar magnet is divided into two pieces, which of the following statement is correct?

• A. two new magnets are created
• B. the magnetic field of each separate piece becomes stronger
• C. the electric field is created
• D. the bar magnet is demagnetized

An object floats in a fluid when it displaces it's

• A. volume of liquid in which it floats
• B. mass of fluid in which it foats
• C. weight of fluid in which it foats
• D. density of fluid in which it foats

The energy associated with the emitted photon when a mercury atom changes from one state to another is 3.3 ev. calculate the frequency of the photon. [e = 1.6 x 10^-19c; h = 6.6 x 10^-13js]

• A) 1.3 x 10^-15 Hz
• B) 3.1 x 10⁵² Hz
• C) 3.2 x 10^-53 Hz
• D) 8.0 x 10¹⁴ Hz

State three methods of polarising an unpolarised light

The production and type of charge of a body can only be accounted for by the?

• A) deficiency or surplus of electrons
• B) equibrium in protons and neutrons
• C) deficiency or surplus of protrons
• D) deficiency or surplus of neutrons

Suppose three identical steel balls Q, R, and S, are placed on an undulating ground as illustrated in the diagram below. Which of the balls is/are in neutral equilibrium?

• A. S only
• B. Q only
• C. R only
• D. Q and S only

A conductor has a diameter of 1.00mm and length of 2.00m. If the resistance of the material is 0.1Ω, the resistivity is

• A) 2.55 × 105 Ωm
• B) 2.55 × 103 Ωm
• C) 3.93 × 10-6 Ωm
• D) 3.93 × 10-8 Ωm

A cell of e.m.f 12V and internal resistance 4Ω is connected to an external resistor of resistance 2Ω. Find the current flow.

• A) 5 A
• B) 4 A
• C) 3 A
• D) 2 A

When the breaks in a car are applied, the frictional force on the tyres is?

• A. a disadvantage because it is in the direction of the motion of the car
• B. a disadvantage because it is in the opposite direction of the motion of the car
• C. an advantage because it is in the direction of the motion of the car
• D. an advantage because it is in the opposite direction of the motion of the car