Question 4546:

• NECO 2004

Which of the following is NOT an example of a percussion instrument?

A. Bell
B. Drum
C. Flute
D. Gong
E. Xylophone

Question 4547:

• NECO 2004

The time t₁, t₂ and t₃ for 20 complete oscillations of a simple pendulum experiment are 32.0s, 34.6s and 35.5s respectively. Calculate the mean period of the pendulum.

A. 1.60s
B. 1.70s
C. 1.73s
D. 1.78s
E. 5.11s

Question 4548:

• NECO 2004

Calculate the magnitude of the electric field intensity in vacuum at a distance of 25cm from a charge of 5 × 10^-3C. [Take 1/4πε₀]

A. 7.2 × 108NC^-1
B. 1.8 × 108NC^-1
C. 5.6 × 108NC^-1
D. 3.6 × 108NC^-1
E. 1.5 × 106NC^-1

Question 4549:

• NECO 2004

The temperature at which the water vapour present in the air is just enough to saturate the air is the ____________ point.

A. Boiling
B. Critical
C. Dew
D. Ice
E. Steam

Question 4550:

• NECO 2004

Which of the following statements is true of nuclear fission?

A. Heavy nuclei combine to form new element
B. Protons are used in bombarding heavy nucleus
C. The sum of the masses of the products is greater than the mass of the original substance
D. Two light nuclei are made to combine to form a heavy nucleus
E. Very large amount of energy is released.