One of the following statements is true with regards to bodies that float or are

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Question
One of the following statements is true with regards to bodies that float or are submerged in liquids :
Options
A. For a body wholly submerged in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity of the body
B. For a body floating in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity of the body
C. For a body floating in a liquid the stability is ensured if the centre of buoyancy and the centre of gravity, regardless of the relative positions of the centre of buoyancy and gravity
D. For a body floating in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity and the metacentre is above both the centres of gravity and buoyancy.

Correct Answer

For a body floating in a liquid the stability is ensured if the centre of buoyancy is below the centre of gravity and the metacentre is above both the centres of gravity and buoyancy.

More questions

1. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form
Options
A. Mono-chloramine (NHCl)
B. Di-chloramine (NH₂Cl)
C. Nitrogen trichloramine (NCl₃)
D. All the above.

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3. The check rails are placed opposite the crossing so that
Options
A. it is symmetrically placed opposite nose of crossing
B. its one-third length is ahead of the nose of crossing
C. its two-third length is ahead of the nose of crossing
D. its three fourth length is ahead of the nose of crossing.

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4. The following statement is one of the laws of Dynamic friction
Options
A. The force of friction always acts in a direction opposite to that in which a body is moving
B. The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction
C. For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
D. all the above.

Discuss

6. Pick up the incorrect statement from the following :
Options
A. while measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length
B. an increase in temperature causes a tape to increase in length and the measured distance is too large
C. the straight distance between end points of a suspended tape is reduced by an amount called the sag correction
D. a 100 m tape of cross section 10 mm x 0.25 mm stretches about 10 mm under 5 kg pull.