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Four identical rods are joined end to end to form a square. The mass of each rod is M and length L. The moment of inertia of the square about:
1. the median line?
2.one of the diagonals is?

Find the ratio in which the line segments joining the points (2,-1,3) and (-1,2,1) are divided by the plane x + y + z = 5.

Find the equation of a circle which passes throught point (1,2) and touches the line y=x+3.The point (3,4) is inside the circle.

 The number of common tangents that can be drawn to the circles
  +Undetermined error: Undetermined error: @@y^2@@ – 4x  − 6y –3 = 0 and   + Undetermined error: Undetermined error: @@y^2@@  + 2x + 2y + 1 = 0 is??

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the angle between the lines y = (2- root 3 )x+5 and Y= (2 + root3 )x -7 is ?????

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1.Iodine molecules dissociates into atoms after absorbing light of 4500 angstrom.If 1 quantum of radiation is absorbed by each molecule,calculate the kinetic energy of iodine atoms.(bond energy of iodine molecules=240kJ/mol) 2.Find out the value of electrostatic potential energy of 2 electrons separated by 3.0 angstrom in vacuum. 3.Calculate the velocity of an electron placed in the 2nd orbit of Li2+ ion.Also Calculate the number ofrevolutions per second that it makes around the nucleus.

Why do migrating birds fly in a "v" formation?

Migrating birds like canadian geese use a teachnique called squadron formation. The squadron formation allows them to flow freely and conserve energy. Also, their streamlined v shape allows them to travel long distances.

 The sum to n terms of the series 1 + [2(1 + 1/n)] + [3(1+1/n)^2] +.... is?


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When a cylindrical body rolls down on an inclined plane, then why is it said to be combination of rotational & translational motion?

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