Waec Physics 2000 Past Questions and Answers

Question 51:

• WAEC 2000

The nucleon number and the proton number of a neutral atom of an element are 23 and 11 respectively. How many neutrons are present in the atom?

A. 11
B. 12
C. 23
D. 34

Question 52:

• WAEC 2000

In a nuclear reactor, electricity can be generated through the following processes. Arrange the processes in the correct order. i. The steam is used to drive turbines. ii. The heat energy released is removed by passing water through the reactor. iii. The turbines in turn generate electricity. iv. The water then passes through some form of heat exchanger to produce steam

A. Ii, iv, i and iii
B. I, ii, iii and iv
C. Iii, i, iv and ii
D. Iv, i, iii and ii

Question 53:

• WAEC 2000

The duality of matter implies that matter

A. Exists as a particle of dual composition
B. Has momentum and enrgy
C. Has both wave and particle properties
D. Is made up of dual materials

Question 54:

• WAEC 2000

A body of mass 0.6kg is thrown vertically upward from the ground with a speed of 20ms\(^{-2}\). Calculate its;
(i) potential energy at the maximum height reached.
(ii) kinetic energy just before it hits the ground.

Question 55:

• WAEC 2000

What is a projectile? Give four examples of projectiles in everyday life