Question 4386:

• NECO 2001

N.N.P.C. gas cylinder containing 15kg of cooking gas was left open, and the gas emptied in 3.8 minutes, at an average speed of 20 ms^-1. What force was exerted on the gas in the cylinder?

A. 132N
B. 13.2N
C. 1.32N
D. 0.132N
E. 0.013N

Question 4387:

• NECO 2001

An object placed 15cm from a converging lens forms a real image whose magnification is 2.0. What is the focal length of the lens?

A. 5.00cm
B. 10.00cm
C. 15.00 cm
D. 18.00 cm
E. 20.00cm

Question 4388:

• NECO 2001

Which statement about the concept of temperature is NOT true?

A. Temperature decides the direction of heat flow between two bodies
B. Temperature is a measure of coldness of a body
C. Temperature is a vector quantity
D. Temperature is a measure of hotness of a body.
E. Temperature scales include Fahrenheit, Celsius and Kelvin

Question 4389:

• NECO 2001

Which is a stringed Instrument?

A. Drum
B. Flute
C. Piano
D. Saxophone
E. Trumpet

Question 4390:

• NECO 2001

The statement that the mechanical advantage of a machine is 3 means that the ____________

A. Efficiency is 33\(\frac{1}{3}\)%
B. Effort is three times as large as the load
C. Mechanical advantage is 3 times as large as the velocity ratio
D. Ratio of the effort to the load is 1: 3
E. Velocity ratio is 3