Question 4231:

• WAEC 2020

Which of the following machines does not apply the lever principle?

A. Claw hammer
B. Wheelbarrow
C. Single pulley
D. Sugar tong

Question 4232:

• WAEC 2020

The average distance moved by a molecule between collisions is called

A. Molecular distance
B. Intermolecular distance
C. Mean distance
D. Mean free path

Question 4233:

• WAEC 2020

Which of the following waves requires a material medium for its propagation?

A. Radio waves
B. Light waves
C. Sound waves
D. X-rays

Question 4234:

• WAEC 2020

The depolarising agent in a Leclanche cell is?

A. Carbon rod
B. Ammonium chloride
C. Manganese (IV) oxide
D. Zinc plate

Question 4235:

• WAEC 2020

The material used to slow down the neutrons in a nuclear reactor is

A. Boron
B. Copper
C. Graphite
D. Uranium