Waec Physics 1997 Past Questions and Answers

Question 21:

• WAEC 1997

Which of the following statements about kinetic theory of matter is not correct?

A. The molecules of matter are always in motion
B. When a body is heated the average kinetic energy of its molecules decreases
C. Molecules of a liquid move more freely than those of a solid
D. Matter is made up of very tiny particles called molecules
E. The molecules of a gas move more freely than those of a liquid

Question 22:

• WAEC 1997

Which of the following is not correct about the Rutherford’s model of an atom?

A. The mass of an atom is concentrated around the nucleus
B. The nucleus of an atom is positively charged
C. The nucleus is surrounded by the electron cloud
D. The model is applicable to atoms with only one electron in the outer shell
E. The diameter of the nucleus is \(10^{-15}m\)

Question 23:

• WAEC 1997

The ratio of tensile stress to tensile strain is known as

A. Modulus of integrity
B. Modulus of elasticity
C. Shear modulus
D. Bulk modulus
E. Young’s modulus

Question 24:

• WAEC 1997

Which of the following statements is not true of nuclear fission?

A. Mother nucleus is broken into two daughter nuclei of roughly equal parts
B. Neutron is normally used in bombarding heavy nucleus
C. Two light nuclei are made to combine to form a heavy nucleus
D. Very enormous energy is released
E. There is an apparent loss of mass

Question 25:

• WAEC 1997

When a paint brush is removed from clean water, the bristles of the brush are pulled together because of

A. The viscosity of the surrounding air
B. The low density of water
C. Surface tension forces
D. The weight of the brush bristles
E. The mass of the brush bristles