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Q:

The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by

A) Bernoulli's principle B) Magnetic properties of the ship's material
C) Newton's third law of motion D) Earth's gravitational force
 
Answer & Explanation Answer: A) Bernoulli's principle

Explanation:

The rapid flow of air between the two moving ships causes a reducton of pressure (Bernoulli's principle) , so they (the ships) are drawn closer together

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Filed Under: Physics

Q:

The inability of a body to change its state of rest or uniform motion along a straight line is called its

A) momentum B) velocity
C) acceleration D) inertia
 
Answer & Explanation Answer: D) inertia

Explanation:

Flows out of Newton's first law of motion.

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Q:

A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

A) will increase B) will decrease
C) does not change D) varies with the increase of depth of the immersion of the iron piece
 
Answer & Explanation Answer: A) will increase

Explanation:

When the piece of iron is lowered into the water, the water level in the bucket increases. And so the pressure at the bottom of bucket also increases. Thus the total thrust at the botto also increases. Therefore the spring balance reading increases.

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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:

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

Answer

B.R. Ambedkar

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Subject: Famous Personalities

Q:

Which is the largest satellite in the solar system?

Answer

Ganymede , satellite of Jupiter

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Subject: General Science

Q:

What landmark in science and technology did india achieve on 21 November 1963?

Answer

The launch of the first rocket from TERLS or Thumba Equatorial Rocket  Launching Centre.

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Subject: General Science