Question 4371:

• NECO 2001

An astronaut is walking on the moon where the magnitude of the acceleration due to gravity "g’ is one-sixth that on earth. Compared with their magnitudes on the earth, his mass and weight on the moon are ____________

A. Both less
B. Less and the same respectively
C. The same and less respectively
D. The same as on earth
E. Both greater.

Question 4372:

• NECO 2001

Which statement is NOT correct about molecules?

A. The number of molecules in a unit volume of a solid is greater than that in a unit volume of a liquid or gas.
B. Molecules are made up of atoms
C. The force of attraction between two molecules of a solid is greater than that between two molecules of a liquid or gas
D. Molecules of gases are in regular motion
E. Molecules of a solid vibrate about their mean positions.

Question 4373:

• NECO 2001

The inside of a vacuum flask is usually coated with silver to reduce heat loss by ____________

A. Condensation
B. Conduction
C. Convection
D. Evaporation
E. Radiation

Question 4374:

• NECO 2001

What is the angular velocity of an object in a horizontal circular path of radius 1.5m with a constant speed of 12ms^-1?

A. 1.6 rads^-1
B. 4.0 rads^-1
C. 8.0 rads^-1
D. 16.0rads^-1
E. 32.0 rads^-1

Question 4375:

• NECO 2001

A wave is represented by the equation y = 0.5 sin 0.4 Ω(X - 60t), where the distance (X) is measured in centimetres and time (t) in seconds. What is the wave length of the wave?

A. 0.2cm
B. 0.4cm
C. 0.8cm
D. 5.0cm
E. 10.0cm