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Q:

When a steel ball is placed on the surface of mercury, it does not sink because

A) of the surface tension of mercury B) mercury is a semisolid
C) of the high viscosity of mercury D) the density of mercury is greater than that of steel
 
Answer & Explanation Answer: D) the density of mercury is greater than that of steel

Explanation:

A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats

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Filed Under: Physics

Q:

A boy is swinging a ball attached to a string in a horizotal circle. If the string snaps 

A) the ball will travel towards the center of the circle and fall down B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C) it will fall down at the same place where the string breaks D) None of these
 
Answer & Explanation Answer: B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Explanation:

The centripetal force having been removed the body cannot  execute the curved path

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Filed Under: Physics

Q:

A hunter on the ground wishes to shoot a  bird on a tree at a distance with his rifle. He has to point the rifle

A) at the lower alevation than the bird B) at a higher alevation than the bird
C) In the same direction as the bird D) vertically upwards
 
Answer & Explanation Answer: B) at a higher alevation than the bird

Explanation:

The trajectory of the bullet is a parabola

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Filed Under: Physics

Q:

The playback singer who is certified as the 'Most Recorded Artist' in the world (2009) by the World Records Academy is ________

Answer

Asha Bhosle . She  is the sister of Latha Mangeshkar

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Subject: Famous Personalities

Q:

Who is the first British footballer to play 100 champions League matches and the highest paid player in the world ?

Answer

David Beckham

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Subject: Famous Personalities

Q:

Who is the veteran communist leader and CM of West Bengal for a record five consecutive tems until Nov 2000?

Answer

Jyoti Basu

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Subject: Famous Personalities

Q:

Who is the youngest Asian to win the international Master's title?

Answer

Viswanathan Anand

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Subject: Famous Personalities

Q:

Who is the Emancipator of the 'untouchables' and crusader for social Justice?

Answer

B.R. Ambedkar

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Subject: Famous Personalities