Question 4456:

• NECO 2002

In which simple machine is the effort applied between the load and the fulcrum?

A. Claw hammer
B. Nut crackers
C. Pliers
D. Sugar tongs
E. Wheelbarrow

Question 4457:

• NECO 2002

A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?

A. 240N
B. 32N
C. 20N
D. 12N
E. 8N

Question 4458:

• NECO 2002

If the temperature of a resistance wire is gradually increased, its resistance will ____________

A. Decrease gradually
B. First increase and then decrease
C. First increase and then remain the same
D. Increase gradually
E. Remain the same

Question 4459:

• NECO 2002

If the size of the hole of a pinhole camera is increased, the image formed becomes ____________

A. Brighter and blurred
B. Brighter and larger
C. Brighter and sharper
D. Blurred and duller
E. Blurred and larger

Question 4460:

• NECO 2002

A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms^-1]

A. 1320m
B. 660m
C. 400m
D. 330m
E. 165m