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Numerical from Kinematics and vectors

  1. A jetliner moving at 500. km/h due east moves into a region where the wind is blowing from exactly NW toward the SE at a speed of 127 km/h. What is the new velocity of the airplane? you must include both magnitude and direction in your answer.
  2. The speed of a train changes from36km/h to 72km/h in 10sec. calculate the distance travelled during this time

 

Resultant magnetic force

What is resultant magnetic force? can you please explain with an example.

(Shreya)

Answer:

When a magnetic substance (or a magnet) is placed in a region where there are multiple magnetic fields, the net force due to all of them is called the resultant.

In other words, it is that magnetic force which can effectively replace all other magnetic force acting on it

(Need more explanation? Post as comment to this post for details)

 

Coulombian force and conductor

what’s effect of  coulombic forces on conductor medium ?

amk niazi

Ans:

In a conductor, the coulombian  repulsive forces  pushes the valence electrons and the electrons move away from the center to the surface ie from the region of stronger force to the region of lesser force, creating a Faraday cage

 

Photos from KVS Regional Science Exhibition (Chennai) 2010

The KVS Regional Science Exhibition 2010 (Chennai Region) was conducted at KV Pattom on 1 & 2 Sep 2010

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