Question 4596:

• NECO 2005

Which of the following statements is/are correct in any machine?

I. The velocity ratio is usually greater than the mechanical advantage.
II. Efficiency work inputwork outputIII. The velocity ratio is independent of friction.

A. I only
B. III only
C. I and II only
D. I and III only
E. II and III only

Question 4597:

• NECO 2005

Which of the following is a percussion Instrument?

A. Flute
B. Guitar
C. Piano
D. Trumpet
E. Xylophone

Question 4598:

• NECO 2009

Which of the following statements about a gas is NOT correct?

A. It has no definite shape
B. It is compressible
C. Its molecules are closely packed
D. Its molecules gain kinetic energy when heated
E. Its molecules move about randomly

Question 4599:

• NECO 2009

A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14).

A. 0.05s
B. 1.00s
C. 2.00s
D. 3.14s
E. 6.28s

Question 4600:

• NECO 2009

Which of the following statements is correct about light and sound waves? Both

A. Are longitudinal waves
B. Are transverse waves
C. Have the same velocity in air
D. Need a medium for propagation
E. Transmit energy