Recently Active Questions

Three identical balls are connected by light inextensible strings with each other as shown and rest over a smooth horizontal table. At the moment t=0, ball B is imparted a velocity. Calculate the velocity of A when it collide ...

A thin convex lens whose focal length in air is known to be 30cm is cut into two parts by a transverse plane parallel to principal axis and 0.5cm above the principal axis. They are placed on the x-axis a shown in the figure.A ...

Q. A hammer of mass M falls from a height h repeatedly to drive a pile of mass m into the ground. The hammer makes the pile penetrate in the ground to a distance d in single blow. Opposition to penetration is given by? ...

Let 2x2+y2-3xy=0 be the equation of a pair of tangents from origin O to a circle of radius 3 with center in the first quadrant. If A is one of the points of contact, Find the length OA ...

The aqueous solution with the lowest freezing point is (1) 0.01 m glucose (2) 0.01 m KCl (3) 0.01 m BaCl2 (4) 0.01 m K4[Fe(CN)6]? With explanation please.thanks ...

Light of wavelength 4000 Ao is incident at small angle on a prism of apex angle 4o The prism has nv = 1.5 & nr = 1.48. The angle of dispersion produced by the prism in this light is ? A)0.2o B) 0.08o C)0.192o D)None of these ...

Number of unhybridised orbitals in vinyl acetylene are (A) 2 (B) 3 (C) 4 (D) 6 ...

A lift performs the first part of its ascent with uniform acceleration a and the remaining with uniform retardation 2a.If t is the time of ascent,find the depth of the shaft. (a) at2/4 (b) at2/3 (c) at2/2 (d) at2/8 (According ...

wat is phenoxide moiety?????? ...

hello!! i am nearly a starter in ORGANIC CHEMISTRY!! i am presently using a book ORGANIC CHEMISTRY ARIHANT PUBLICATIONS... Is this book good enough??I mean which is the best book to use to gain best and clearest theoritical c ...

Q: A ball hits the floor and rebounds after an inelastic collision. In this case, a) the momentum of the ball just after collision is the same as that before collision. b) the mechanical energy of the ball remains same during ...

d arithmetic mean of d roots of d equatio n 4Cos3x -4Cos2x -Cos[315pie+x]=1 ...

*Image* A finite ladder is constructed by connectiong several sections of 2uF and 4uF capacitors combination as shown. IT is terminated y a Capacitor of C...wht should be the value oif C...so that the equivalent capacitence o ...

a block of mass m produces an extension of 9cm in an elastic spring of length 60cm when it is hung by it, and the system is in equilibrium. the spring is cut in two parts of 40cm and 20cm lengths, the same block hangs in equi ...

Q1. Two ships A and B originally at a distance d = 3 km from each other depart at the same time from a straight coastline. Ship A moves along a straight line perpendicular to the shore while ship B constantly heads for ship A ...

The smallest ketone and its next homologue are reacted with NH2OH to forn oxime. (a) two different oximes are formed. (b)three diff oximes are formed . (c)two oximes are optically active. (d) all oximes are optically active. ...

Three sound waves of equal amplitudes have frequencies (v -1), v, (v + 1). They superpose to give beats. What is the number of beats produced per second?? Please give detailed explanation. ...

A particle moves from position {{ar{r}}_{1}}=3hat{i}+2hat{j}-6hat{k} to position {{ar{r}}_{2}}=14hat{i}+13hat{j}+9hat{k} under the action of force 4hat{i}+hat{j}+3hat{k},N . The work done will be ...

Tell me somebody how to integrate this How to integrate dv/ v2+ 2v,??? ...

let a,b,c,d represent coplanar vectors and sin(A)a + 2sin(2B)b + 3sin(3C)c - 4d = 0 then find the least value of sin(A)^2 +sin(2B)^2 + sin(3C)^2 is.... 1. 7/8 2. 8/7 3. 1 4. 2/3 ...

The tangent at a point C of a circle and diameter AB when extended intersect at P. If ∠PCA = 110° , find ∠CBA. a) 70° b) 105° c) 110° d) 120° ...

The fig. shows a silvered lens . ref. index of a = 1.6 and ref. index of b= 1.2 , R1 = 80 cm , R2 = 40 cm and R3 = 20 cm. An object is placed at a distance of 12 cm frm this lens. Find the image posn. http://img835.imageshack ...

prove that tan 3x/ tan x never lies in the range3 and 1/3 whenever define! ...

Figure (15-E11) shows a string stretched by a block going over a pulley. The string vibrates in its tenth harmonic in unison with a particular tuning fork. When a beaker containing water is brought under the block so that the ...

Domain of f(x)=log |log x| is a) (0,,infty ) b) (1,,infty ) c) (0,,1)cup ,(1,infty ) d) (-infty ,,1) ...

A student says that he had applied a force F=-k x on a particle and the particle moved in simple harmonic motion.He refuses to tell whether k is contant or not.Assume that he has worked only with positive x and no other force ...

A spherical body of area A and emissivity 0.6 is kept inside a perfectly black body. total heat radiated by the body at temperature T is ... ...

A heavy, flexible, inelastic chain of length L is placed almost symmetrically onto a light pulley which can rotate about a fixed axle, as shown in the figure. *Image* What will the speed of the chain be when it leaves the pul ...

Q 17. The locus of the vertices of the family of parabolas y=a3x2/3+ a2x- 2a is (1) xy= 105/64 (2) xy= 3/4 (3) xy= 35/16 (4) xy=64/105 ...

will Co(NH3)4Br2Cl show optical isomerism??? ...