Question 4591:

• NECO 2005

The mercury column in a simple mercury barometer is of height 5m above the mercury in a reservoir. If the tube is replaced with one whose radius is twice that of the first tube, what will be the height of the mercury column in the new tube?

A. 2.5m
B. 5.0m
C. 7.5m
D. 10.0m
E. 20.0m

Question 4592:

• NECO 2005

The escape velocity of an object from the gravitational field of a planet

I. Increases with the mass of the object
II. Increases with the mass of the planet
III. Is smaller on the moon than on the earth. Which of the above statements is/are correct?

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

Question 4593:

• NECO 2005

Which of the following is a non-renewable energy source?

A. Coal
B. Hydro
C. Ocean waves
D. Solar
E. Tides

Question 4594:

• NECO 2005

Which of the following is NOT a component of an a.c. generator?

A. Armature
B. Carbon brushes
C. Magnet
D. Slip ring
E. Split rings

Question 4595:

• NECO 2005

An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

A. 12ms^-1
B. 7ms^-1
C. 6ms^-1
D. 5ms^-1
E. 4ms^-1