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 Ankit Bisht's messages in the community 1 2 3 4 GO Go to Page...
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Two small bodies of masses 10 kg and 20 kg are kept at a distance 1 m apart and released, Assuming  that only mutual gravitation force is acting , find the speedsd of the particles when the separation decreases to .5 m
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Four particles of equal masses M move along a circle of of radius R under the action of their mutual gravitational attraction. Find the speed of each particle
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Four particles having masses m , 2m , 3m and 4m are placed at the four corners of a square of edge a . Find the gravitational force acting on a  particle of mass m placed at the centre .
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Only this chapter is necessay for IIT-JEE.
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WHICH ONE IS GOOD ARIHANT'S OBJECTIVE MATHEMATICS FOR IIT OR A DAS GUPTA
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For theoritical part use morrison and Boyd and for questions use Arihant(organic chemistry)
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On the basis of the acid-catalyzed hydration, can you suggest a reason why the reaction

CH2=CHCH(CH3)2      H2SO4            CH3CHCH(CH3)2
H2O

would probably not be a good method for the synthesis of 3-methul-2-butanol ?
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A spring of negligible mass having a force constant k extends by an amount y when a mass m is hung from it. The mass is pulled down a little and released. The system begins to execute SHM of amplitude A and angular frequency    . The total energy of the mass-spring system will be

A)    1/2 mA2     2
B)     1/2 mA22  + 1/2 ky2
C)    1/2  ky2
D)    1/2 mA2 2  - 1/2  ky2

Ans ? (B)

Plz explain

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The work done by the external forces on a system equals the change in
a)      total energy
b)      kinetic energy
c)      potential energy
d)      none of these

Plz explain the ans

ans is (a)
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A heavy stone is thrown from a cliff of height h with a speed v. The stone will hit the ground with max speed if it it thrown
a) vertically upward
b) vertically downward
c) horizontally
d) the speed does not depend on the initial direction
plz explai

ans is (d)
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The equation of the tangent at the point P(t), where t is any parameter, to the parabola y2 = 4ax is

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Brilliant tutorials because many students take part in it
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A concave mirror forms the real image of a point source lying on the optical axis at a distance of 50 cm from the mirror. The focal length of the mirror is 25 cm. The mirror is cut in two and its halves are drawn a dist of 1 cm apart in a direction perpendicular to the optical axis . How will the image formed by the halves of the mirror be arranged
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Convex and concave mirrors have the same radii of curvature R. The distance between the mirrors is 2R. At what point on the common optical axis of the mirrors should a point source of light A be placed for the rays to converge at the point A after being reflected first on the convex and then on the concave mirror?

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A point source of light S is placed on the major optical axis of the concave mirror at a distance of 60 cm. At what distance from the concave mirror should a flat mirror be placed for the rays to converge again at the point S having been reflected from the concave mirror and then from the flat one? Will the position of the point where the rays meet change if they are first reflected from the flat mirror? The radius of the concave mirror is 80cm.

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it will attak that c atom which is linked to the H atom
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Which is the best books to prepare for NTSE .
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A regular polygon of n sides is formed by bending a wire of total length 2  r which carries a current I, (a)Find the magnetic field B at the centre of the polygon. (b) By letting n  infinity  ,deduce the expression for the magnetic at the centre of a circular current.
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A long straight wire carries a current i. Let B1 be the magnetic field at a point P at a distance d from the wire. Consider a section of length l of this wire such that the point  P lies on a perpendicular bisector of the section. Let B2 be the magnetic field at this point due to this section only. Find the value of of d/l so that B2 differs from B1 by 1%.

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