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The letters of the word COCHIN are permuted and all permutations are arranged in an alphabetical order as in an English dictionary.What the number of words that appear before the word COCHIN ?

A kid of massM stands at the edge of a platform of radius R which can be freely rotated about its axis . the M.I of the platform is I. The systemis at rest when a freind throws a ball of mass m and the kid catches it .If the velocity of the ball is v horijontly along the tangent to edge of the platforn when it was caught by the kid,find the angular speed of the platform after the event.

A semiconductor YBa₂Cu₃O₇ is prepared by a reaction involving Y₂O_{3 ,}BaO₂and CuO.what should be ratio of their moles ?

The matematical expression for uncertainty principle is

E

T

h/4

.

Please derive and explain.

In an experiment,it is found that 2.0769g of pure X produces 3.6769g of pure X₂O₅.What is the number of moles of X?

_{[0 ]}

^{[1 ]} I 3X-1 I dx.

Because of the friction between the water in oceans with the earth's surface,the rotational kinetic energy of the earth is continuously decreasing.if the earth's angular speed decreases by 0.0016rad/day in 100 years.Find the average torque of the friction of the earth.Radius of the earth is 6400km and its mass is 6.0 x 10^24.

I am not understanding the methods please explain nicely.

A light rod of length 1m is pivoted at its centre and and two masses of 5kg and 2kg are hung from the ends .Find the initial angular acceleration of rod assuming that it was horizontal in the beginning.

For figure,Please consult H.C.Verma,page no.197,Question no.31

A uniform meter stick of mass 200g is suspended from the ceiling through two vertical strings of equal lengths fixed at the ends.A small object of mass 20g is placed on the stick at a distance of 70 cm from the left end. Find the tensions in the two strings.

_{[1 ]}

^{[3 ]} (2X²+5X) dx

Go for vidya mandir classes........................

Please name some good teachers of patna of physics,chemistry,maths.

A cubical block of mass m and edge a slides down a rough inclined plane of inclination

with a uniform speed.Find the torque of the normal force acting on the block about its center.

_{[0 ]}

^{[1 ]} log(1+X)/(1+X²)