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Al doesn't react with HNO3. this is true or false. Why???? ...

A ring as shown in the 'figure' is made up of two semi circular rings A and B of masses " 2 Kg " and " 4 Kg " respectively. The ring has diameter " 1 m ". If the Ring rolls without slipping, Find - *Image* 1. " Angular Accele ...

Q) Find the no. of three elements sets of positive integers ( a,b,c ) such that a*b*c = 2310. Q) Find the no. of integers between 1 and 10000 with at least one 8 and at least one 9 as digits. ...

Find all such numbers that are powers of two and on removing its first digit in decimal representation gives another powers of two. [prerequisites : Nothing] ...

Quadrilaterals are formed by using the vertices of a convex polygon of 24 sides. The number of quadrilaterals having atleast one side of the quadrilateral in common with the side of the polygon is ? We can find out the total ...

*Image* a vector along horizontal 'ma' i need its component up the incline,it can be done in two ways & i get two answers 'ma cos θ' and 'ma/cos θ' i was wondering which is correct and why ? ...

*Image* ...

Can't we increase the size of fonts in a pdf page for printing... without converting it into any other formats like .doc or any other formats... ? Coz when we convert them into docs ... the format isn't proper...!! like, 22 g ...

*Image* Find LF - LE ???? thank you ...

how can we prove that time period of compound pendulum is minimum when its length is equal to the radius of gyration about its centre of gravity... pls reply urgent... ...

Suppose a particle is moving along x- axis with constant velocity.A force F directed along y-axis starts acting on it.Just take the motion along y-axis of the particle.As particle accelerates along the y-direction its velocit ...

1) *Image* ------------------------------------------------------------------------------------------ 2)just a doubt.... *Image* *Image* my doubt is shud'nt it be 4 common tangents ??? ...

If f:[0,1]→[0,1] be a continuous function such that f(f(x))=1 for all x in[0,1]. Find all possible values of ∫f(x) dx with 0 to 1 as limits of integration ...

Does there exist a power of 2, such that its digits (in decimal representation) can be permuted to form a different power of 2? ...

what is the infinite series expansion for sec-1x? ...

i have ml khanna,arihant objective approach and TMH for mathematics but they dont have proofs of various theorems,properties. please suggest a book which has theory as well as proofs of all the theorems,properties of the chap ...

A circular disc of diameter d lies horizontally inside a metallic hemispherical bowl of radius 'a'. The disc is just visible to an eye looking over the edge. The bowl is now filled with a liquid of refractive index u. Now the ...

*Image* value of [flux]*[epsilon] through curved surface=?.. i'm getting 56/65 .. pls confrm... ...

I am confusing over basic probability..! Please help out...! Suppose a bag has 5 red 3 white and 2 black balls..! The probability of getting one red and one white ball is..? I am confusing over the following two things: a) 5/ ...

draw graph of {\color{green} y}{\color{blue} =}{\color{red} e^{e^{x}}} ...

A ball of mass M moving with velocity V0 on a frictionless surface strikes the first of two identical balls, each of mass m = 2 kg, connected by a massless spring with spring constant k = 1 kg/s2 (see Figure). Consider the co ...

Let A be 2x2 matrix such that !A!=2 and B be 3x3 matrix such thatr !B!=3 and C be 4x4 matrix such that !C!=4.Then the value of *Image* ...

Last question of old NCERT : Chapter - EMI A line charge " λ " per unit length is lodged uniformly onto the rim of a wheel of mass " M " and radius " R " . The wheel has light non - conducting spokes and is free to rotate wi ...

please help,, dis q was sent to me by a friend. i'm confused here--- *Image* thanks ans- 3>1~2>4 ...

Q1. Find the locus of the centroid of an equilateral triangle inscribed in the ellipse? use general equation of ellipse? ...

not a doubt... Prove that the straight lines joining the origin to the points of intersection of the straight lines hx+ky=2hk and the curve (x-k)2+(y-h)2=c2 are at right angles if h2+k2=c2 ...

What is the maximum angle to the horizontal at which a stone can be thrown and always be moving away from the thrower ? the interesting thing is all over projectiles i never thought of this as a problem ;) ...

If I(m,n)=\int_{0}^{1}{t^m(1+t)^ndt} , then the expression for I(m,n) in terms of I(m+1,n-1) is: a) 2n/m+1 - n/m+1 I(m+1,n-1) b) n/m+1 I(m+1,n-1) c) 2n/m+1 + n/m+1 I(m+1,n-1) d) m/n+1 I(m+1,n-1) DISCLAIMER:: Show Steps..! Els ...

A physical quantity x is being calculated by using the formula x = yz . In a particular set of values , the value of y is measured with an error of +10% , whereas the value of z is measured with an error of -10% . For this pa ...

10 gms of 57Co kept in an open container beta-decays with a half life of 270 days. The wt. of the material inside the container after 540 days will be very nearly (A) 10 g (B) 5 g (C) 2.5 g (D) 1.25 g ...