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a triangle is constructed using wires ..ab, bc,ca of same material and of resistance ....alpha ,2alpha,3alpha rescptivly....Another wire of resistance alpha/3 frm A can make sliding contact wid wire BC . find maximum resistan ...

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if α,β are d roots of x2 -x-1 =0 and An = αn +βn then A.M of An-1 and An is ........... ...

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I am a student of class XII. Please tell me how to prepare for IIT-JEE and other competetive exams. ...

I have understood the basic Differentiations properly, but I am confused about how to apply them in physics sums... ...

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1. Show that the point M(-3,2) outside the triangle whose sides are given by the equations x+y-4=0, 3x-7y+8=0 and 4x-y-31=0 2. One diagonal of a square is the portion of the line 7x+5y=35 intercepted by the axes. Obtain the e ...

why mica should be used to increase capacitance of a parallel capacitor between plates of a sheet???????? ...

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3.6 g of H20 and 9.2 g of ethanol are mixed together. The soln. obeys raoult’s law. Calculate the mole fraction of ethanol and water in vapour phase. P0water =400 mm Hg , P0ethanol=450 mm Hg ...

pLZ any organic tip here.......like how to increase, decrease Carbon atom , distinguishing between compounds , solving word problems, etc etc... ...

Let h(x)=f(x)-(f(x))2+(f(x))3 for every real no x. Then- (a)h is increasing whenever f in is increasing. (b)h is increasing whenever f is decreasing. (c)h is decreasing whenever f is decreasing. (d)nothing can be said in gene ...

i read tht if secondary alcohols when vigriously oxidised in kMnO4 gives acit...but whn we use bwrd vigrious do we mean heating it?/? ...

The function f(x)=sin4x+cos4x increases if (a)0<x<pi/8 (b)pi/4<x<3pi/8 (c)3pi/8<x<5pi/8 (d)5pi/8<X<3pi/4 ...

A point-like electric dipole (dipole moment = p) is kept at the origin, pointing along the +z direction. A point charge q having mass m is released at rest from a point on the xy plane at a distance R from the origin. Assumin ...

I think everyone has come across this familiar problem: Three snails A, B, C are initially located at the vertices of an equilateral triangle. Starting at t=0, they all move with the same constant speed such that A always poi ...

Nishant bhaiya, I have a problem regarding my discussion forum.Only the old questions sent by the users are there and the questions sent by me are present on the discuss page.I am not able to view all the new questions.Please ...

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A horse pulls a wagon of 5000kg from rest against a constant resistance of 90N.The pull exerted initially is 600N and it decreases uniformly with the distance covered to 400N at adistance of 15m from the start.the velocity of ...

Q1 - If cos4 (θ + α) , sin4(θ + α) are the roots of the equation x2 +b(2x+1) = 0 and cos2(θ+β),sin2(θ+β) are the roots of the equation x2+4x+2 = 0 then b is equal to ? Q2 - (Sinθ / sin δ)2 = tan θ / tanδ = 3 then ...

for stereoselective reactions is it necessary to have a chiral object which imparts influence?????????????? ...

A trolley of mass 200kg moves with a uniform speed of 36km/h on a frictionless track.A child of mass 20kg runs on the trolley from one end to the other ,10m away,with a speed of 4 m/s relative to the trolley in a direction op ...

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with a uniform speed of 7m/s.It hits the floor of the elevator (length of the elevator =3m) and does not rebound.What is the heat produced by the impact ...

let d(n) denote no. of divisors of n,then prove that d(n)<2 n ...

A capacitor of capacitance 500μf is connected to battery through a 1000KΩ resistor .the charge stored on the capacitor in the first 5 sec is larger than the charge stored in the next;;;; options: 5sec 50sec 500sec 5000sec ...

the energy of a uniformly charged non-conducting sphere having charge Q and radius R ????????????explain ...

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Q- Two cars left place A simultaneously and reached the place B in 2 hrs.The first car traveled half the distance with a speed of 30km/hr and the other half at a speed of 45km/hr.The second car at the same time covered the en ...