Recently Active Questions

a ball of mass m is thrown up with a vel. 10 m/s.and it returns to the hand of the thrower with a vel .of 9 m/s. find the height attained by the ball(take level of hand to be 0 and air resistance to be uniform) ...

From a variable point P on y=x-3 tangents PQ& PR are drawn to the circle x2+y2 = 4 , Q' & R' r the corresponding points of Q & R on the ellipse x2/4+y2=1 in the same quadrants as Q & R The locus of the midpoint of Q' R' is an ...

a spider(with 8 diff legs) has 8 diff socks n 8 diff shoes. in how many ways can the spidey wear the stuff?? HINT: a shoe is worn only ater wearing a sock!!!!!! ...

1. If A and B are symmetric matrices of the same order,then (A) AB is a symmetric matrix (B) A - B is a skew-symmetric matrix (C) AB + BA is a symmetric matrix (D) AB - BA is a symmetric matrix 2. If A,B,C are three matrices ...

can someone please give me sucess magnet solutions??? I seem to have lot my roll no and along with that my account_id and pasword Thanks ...

Visit google.com for a dedicated front page on google with the falling apple [1] btw how much of Netwon's work is his own is a huge question of history and debate.. But yeah its his birthday today... ...

the reactivity of SN1 increases with the stability of carbocation where as that of nucleophilic addition rxn decreases with stability of carbocation?? ...

What are the products in following reactions ? *Image* ...

1)Find the value of "t" for which- e2x= t x , has only one solution. 2)Let "g" be the inverse function of a differenciable function "f" such that, G(x) = 1/g(x). If f(4)=2 & f'(4)= 1/16, then (G'(2))2 =? 3) Value of "a" for w ...

The hybridisation in PH3 molecule is ...

lim-x→0 xx= ...

1> If 84^n divides (496)! , then what is the maximum value of n ?? 2> What is the number of 5 digit multiples of 3 that end with digit 6 ?? ...

*Image* ...

Functions f(x) & g(x) are such that - (f.g)'= (f'.g'). If f(x) = ex2 and g(1)=e, the domain of g(x) being (1/2,∞), find (a+b) if g(5) = aeb. ...

a point mass m starts from rest and slides down the surface of a frictionlesssolid sphere of radius r as shown in fig.(a)measur angles from the vertical and P.E.from the top(b)change in P.E.of the mass with the angle(c)K.E. a ...

what is d-d transition and charge transfer ? how do we judge whether the colour is due to dd transition or due to charge transfer? ...

A ball of mass m is dropped on to a floor from a certain height The collision is perfectly elastic and the ball rebounds to the same height and again falls. Find the average force exerted by the ball on the floor during a lon ...

Q1 : If p(x) is a reciprocal polynomial of odd degree , then one of the roots of p(x)= 0 , is ?? Q2: Sum of rational roots of x5 = (133x - 78) / (133 - 78 x ) ...

In how many ways we can place one white and one black rook on a chessboard so that they do not attack each other ? ...

This is strictly for those who stay in West Bengal! I know that what I am going to ask is not anything by a mile related to IIT but still I need some advice from you guys!! I just wanted to know that what is the marks require ...

A gun is mounted on a railroad car. The masses of shell gun car is 50m where m is mass of one shell. If the velocity of gun w r t gun in its state before firing is 200m/s What is the recoil speed of the car after the second s ...

During a heavy rain hailstones of average size 1 cm dia falls with a average speed of 20 m/s. Suppose 200 hailstones strike every sq.m of a 10mX10m roof perpendicularly in one sec and assume that the hailstones do not rebound ...

NISHANT BHAIYA AND OTHERS PLZ REPLY FAST WHICH BOOK SHOULD I USE FOR ORGANIC REACTION MECHANISMS- MUKUL RAY OR S N SANYAL ...

Got this idea after one of sinchan's posts... Not worth a QOD.. but still a nice variation of Seating arrangement. What is the number of ways to seat people at each of the vertices in both the images below. *Image* Aside: I w ...

2 circular loops of equal radii are placed coaxially at some separation. The first is cut and a battery is inserted to drive a curent in it . The current changes slightly due to the variation in resistance with temperature. D ...

A metallic disc of radius r can rotate freely inside a long solenoid (ideal), abt a metallic shaft which runs parallel to the axis of the solenoid and is perp to the plane of the disc and passes through its centre.. Total res ...

*Image* If the answer of Q1) is "x" & that of Q2) is "y", Give the value of (x+y)..... I don't have individual answers. But (x+y) =10. ...

assertion:cyclobutane is less stable than cyclopentane reason:presence of ebnt bonds causes loss of orbital overlap ...

Q1. Assume that the light is monochromatic. Let the no. of photons falling on a surface per unit time be 'n' and I = intensity of light.. Then I\propto n^x where x= _____ Q2. Change in phase when a longitudinal wave reflects ...

f(x)=ax3+bx2+cx+d g(y)=ay3+f'''(m)y2/2+cf''(m)/1+f(m)=0. f(x) has roots α1, α2, α3 and g(y) has corresponding β roots. PT difference between the corresponding roots are equal. ...