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Ph-NH2 + aq. FeCl3→ brown colouration. Why is the solution brown? ...

For which of the following, y can be a function of x? 1. x4=y2 2.y=(log x)2 ...

Q.1. In a Triangle ABC, the bisector of angle A meets the opposite side at D. Using vectors Prove that BD : DC = c : b. Q.2. The vector (-1,1,1) bisects the angle between the vectors C(x,y,z) and (3,4,0). determine a unit vec ...

How many times does the Number 5 appear in front of you when you start writing numbers from 1 to 105 in a row..???? ...

if you have infinite no of Rs.10,20 nd 50 notes....in how many ways can u give a person Rs.1000? i tried dis... getting to find the no of integral solutions to a+2b+5c =100 how to proceed after this? ...

West bengal RMO results are out http://www.isical.ac.in/~rmo/RMO2011Results.pdfhttp://www.isical.ac.in/~rmo/RMO2011Results.pdf ...

1) Find the value of limit |x|[cosx] where x tends to 0.. [.] is the Greatest integer function.. 2) Find the value of limit (xy-yx)/(xx-yy) where x tends to y. 3) Find the solution of 2x+2|x|>= 2√2. Please provide the pr ...

the photoelectrons ejected from the photocathode of a PMT, are said to be of a random count. i.e. for a single given photon hitting the photocathode, the ejection of photoelectrons are sometimes 10 photoelectrons, sometimes 7 ...

If \vec{a},\vec{b},\vec{c} are non-co-planar unit vectors such that \vec{a} x ( \vec{b} x \vec{c} ) = (\vec{b}+\vec{c})/(\sqrt{2}) , \vec{b} and \vec{c} are non parallel, then find the angle between \vec{a} and \vec{b} . ...

suppose a spring mass system is completely immersed in a liquid . If we give small displacement x to it then will boyant force be considered as restoring force along with -kx or not? ...

Q.1 Four dice are rolled once. Find the number of ways in which one die shows at least 3. Q.2 A die is rolled 10 times. Find the number of ways so that the outcomes always contain 1,2,3. ...

Q1:f(x)=(-1)[x] is even or odd?[.] is GINT. Q2: If f:[-20,20]→R given by f(x)=[ x2/a ]sin x+cos x is an even function.then find a.[.] is GINT. ...

Two conducting rings 'P' and 'Q' of radius 'r' and '3r' move in opp. directions with velocity '2v' and 'v' respectively on a conducting surface. there is a uniform magnetic field of magnitude 'B' perpendicular to plane of rin ...

There are exactly two linear functions,which map[-1,1] onto [0,3].Then find the point of their intersection. ...

Determine whether the following function is even or odd f(x+y)+f(x-y)=2f(x)f(y). f(0)≠0.x,y are reals. ...

You have n balls identical in size and appearance but 1 is an odd weight (could be either light or heavy). You have a set scales (balance) which will give 3 possible readings: Left = Right, Left > Right or Left < Right ...

Find the range of the following Q1: [sin2x]-[cos2x] .[.] is GINT functiion. Q2:sin-1[x2+0.5]+cos-1[x2-0.5] .[.] is GINT. ...

f(x)= sinx-cosx+√2/x1.5 for pi/4 ≤x≤ 5pi/4 . if M is maximum value of f(x) and m is minimum value of f(x) , find [ 2M/5m ] , where [ ] is box function. ...

Consider a real valued function satisfying 2f(sin x)+f(cos x)=x. Find the domain and range of f(x). ...

There are exactly two linear functions,which map[-1,1] onto [0,3].Then find the point of their intersection. ...

Show that there is no in finite arithmetic progression consisting of distinct integers all of which are squares. ...

The volume of CO2 gas formed when 2.5g calcium carbonate are dissolved in excess hydrochloric acid at 0degree celsius and 1atm pressure is ? {1 MOLE OF ANY GAS AT 0 DEGREE CELSIUS AND 1 ATM PRESSURE OCCUPIES 22.414L VOLUME} A ...

x+y+z+t=20 where 0<=x,y,z<=5 and 0<=t<=10 . Find the number of integer solution? give full details .... ...

x+y+z+t=20 where 0<=x,y,z<=5 and 0<=t<=10 . Find the number of integer solution? give full details .... ...

4 letters, 2 a's and 2 b's, are to be used for filling 16 cells of a 4* 4 matrix. It is required that each cell contains at most 1 letter, and no row or column can contain two same letters. The number of ways in which such a ...

Kvpy results came. See http://www.kvpy.org.in/main/2011-aptitudetest-results.htm . I didnt qualify. Messed up bio big time :'( . How many of u qualified? ...

If I hav a misconception please clear let Z be a complex no. = 2+3i... in Argands plane the coordinate of the complex no. is (2,3i) now we know that modulus of z = r that is the distance of the coordinate from origin.... now ...

1) Find the number of solutions of 2|x|=sinx2. 2) Find the area enclosed by: | x+y-1| + |2x+y+1|= 1 3) Find the number of solutions of tan4x=cosx when x lies between (0 to pie).. PLEASE Provide the graph with the solution.. ...

find the largest and the smallest 7 digit number formed by the digits from 1 to 9 such that there is no repetition of digits and the number is divisible by all the digits. ...

If in a triangle ABC \textup{a }cosA+\textup{b }cosB+\textup{c }cosC = \textup{s } , where symbols have their usual meanings, then prove that the triangle is EQUILATERAL. ...