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in calculating curved area and volume of a cone . let height =h and radius of base = r , where tanθ = r/h now my doubt is : suppose vertex of cone is origin and height is along x axis then we can write curved area = ∫2πy ...

2 Mirrors placed at an angle of ϴ. N=360°/ϴ. If NϵI N=N If Nϵ not I then N=[N] Now the book says if the position of the object is asymmetric then total number of images formed is N What does it mean by “position of the ...

1)The uncertainty in the location of circulating electron is equal to its de-broglie wavelength. The minimum percent error in its measurement of velocity under this circumstances will be approximately a)4 (b)8 (c)18 (d)22 2)T ...

f(x)=x+∫01(x2y+y2x)dy find f(1)(x and y are independent variables) ...

Guys wanna ask u one thing IN delhi is there a difference betweeen fiitee kalu sarai(South delhi) and other fiitjeee cnetres in dlehi ...

Two satellites of the Earth move in a common plane along circular orbits , the radii being r and r-Δr ( Δr << r ). What is the time interval b/w their periodic approaches to each other over the min. distance . Take M ...

A block of mass m is connected to another block of mass M by a massless spring of spring constant k. The blocks are kept on a smooth horizontal plane. Initially, the blocks are at rest and the spring is unstretched when a con ...

we know that a body can't exceed speed of light but can be just equal to it..i.e. 99.7% of speed of light... we have not achieved that but ..it is possible...now........let it is achieved ...and a super spacecraft is moving w ...

*Image* my answer: 2-phenylcyclopent-1-ylmethanol given answer: 2-phenylcyclopent-3-ene-1-ylmethanol am i correct?? if not explain by which mechanism LiAlH4 reduces! :) thanks in advance! [1] ...

acetylene vs ethylene- which has higher reactivity towards electrophilic attack and why? ...

A neutral gas sample contains 84% ( by volume ) of CH4 , 10 % of C2H6 , 3 % of C3H8 and 3% of N2 . If a series of catalytic reacns cud be used for converting all the C atoms of the gas into butadiene , C4H6 , with 100% effici ...

Q:=> \texttt{Prove that for all z with |z|=1, the relation given is true}} \sqrt{2} \leq |1-z|+|1+z^{2}| \leq 4 ...

*Image* friend this is an image from ur notes on P-P rearrangement...what changes took place in last two steps is unclear to me..can u throw some light on the last two steps? thanx ...

Please solve this questions....!! I'll be grateful for your this act of kindness.....!! and one more thing.... please do show the steps... :) 1. The number of pairs of reals (x,y) such that x = x2 + y2 and y = 2xy is (A) 4 (B ...

Limn→∞1/n(2.5.8.11........3n-1)1/n ...

can we say that if |z1|= |z2|= |z3| and z1 + z2 + z3 = 0 one of z1 ,z2,z3 is real? is it obvious that z1, z2,z3 are the roots of x3= |z1|3 they ll be the vertices of an equilateral triangle but are above things always true? p ...

Q:=> \textup{Prove that amongst 10 successive natural nos. there are always atleast} \textup{one and atmost four numbers that are not divisible by any of the numbers 2,3,5,7} ...

1)find number of real roots of \sum_{r=0}^{r=2n}{}x^r/r! =0 ,(n\epsilon N) 2)Find the number of cubic polynomial p(x) with integral coefficients such that for three distinct integers a,b and c, p(a)=b,p(b)=c and p(c)=a source ...

What is the rds in intramolecular cannizzaro of C5NH5-CO-CO-C6H5? Plz answer ASAP... ...

1.Is H2O2 acidic or basic..why ? 2.Are all salts of Lithium (Li) insoluble in H2O ? 3.Are all salts of Alkali metals (Na,K,Rb,Cs) soluble in H2O ? 4.Is the stability of +1 oxidation state (group 13) in the order B<Al<Ga ...

if in a equilateral triangle three coins of equal radius are placed without overlaping then what is the radius of each coin ...

Let aN be defined as a1 = 0 and aN =(1-(1/N^2))aN-1 -(1/N^2) N is natural no find a2010 ...

any logic behind the result given in the soln *Image* thanks ...

NH2 l CH3-C=NH or (CH3)2NH NH2 group is attached to C Which is more basic and why? ...

wud the answer be 6 hrs ? pls confirm *Image* ...

1. \left(x-1 \right)\sqrt{x^{2}-x-2}\geq 0 ...

evaluate the limit: \lim_{x\rightarrow \propto } \frac{x^{2}(1+sin^{2}x)}{(x+sinx)^{2}} ...

If the line 2x - y +1=0 touches the circle at the point (2,5) and the centre of the circle lies on the line x + y -9 =0. find the equation of the circle. ...

The expressions 1 + x, 1+x+x^2, 1+ x+ x^2 +x^3, .............. 1 + x + x^2 +........+ x^n are multiplied together and the terms of the product thus obtained are arranged in increasing powers of x in the form of a0 + a1X + a2^ ...

When a body is weighed on an ordinary balance we demand that the arm should should be horizontal if the weights on two pans are equal. Suppose the equal are put on two pans, the arm released. Is the torque of the two weights ...