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An ice-skater, weighing 60 kg moving at 10 m/s glides to a stop. If 80% of the heat generated by friction is absorbed by the ice, the amount of ice melted will be nearly (1) 30 g (2) 14 g (3) 7.1 g (4) 4.1 g ...
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If α,β are the two roots of the equation λ(x2-x)+5=0 such that, α/β + β/a =5 and λ1,λ2 are any two values of λ Find the value of λ1/λ2 + λ2/λ1 ...
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If\ f(x)=\sqrt{1-sin(2x)},f'(x) equals\\\ \\ a)-(cos x + sin x) for\ x\in(0,\pi/4)\\b)(cos x + sin x) for\ x\in(\pi/4,\pi/2)\\c)-(cos x + sin x) for\ x\in(\pi/4,\pi/2)\\d)(cos x + sin x) for\ x\in(0,\pi/4)\\ ...
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Choose the correct option *Image* ...
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A uniform rod of mass=2kg and length l=1m rests upon a smooth horizontal surface.One of the ends of the rod is struck with impulse=2Ns in horizontal direction perpendicular to the rod.As a result the rod obtains a momentum=2N ...
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Hi,iam facing a problem in determining when the work done by the friction is positive ,zero and when it is negative.Please help ...
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The asymptotes of a hyperbola are x^2+4xy+y^2-2x+2y-2=0 and the hyperbola passes through (1,1) The centre of the hyperbola is? The conjugate axis of the hyperbola is? What is the eccentricity of the hyperbola? ...
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A:Addition of inert gas at constant volume in Habers process for synthesis of Ammonia produces more amount of NH3 B:Increase in pressure favours the formation of Ammonia in habers process (i)Both true,B is the correct explana ...
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A:The rate of loss of optical activity during isotopic inversion SN2 is twice the rate of isotope exchange. B:SN2 reaction proceeds through inversion (i)Both true,B is the correct explanation of A (ii)Both true B is not the c ...
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The volume percentage of Cl2 at equilibrium in the dissociation of PCl5 under a total pressure of 1.5 atm is? (Kp=0.202) answer:25.5 % ...
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There are infinite equipotential lines all parallel to the line AB in a right angled triangular region ABC as shown.All points on the vertical line have the same potential and proportional to the length of the line. *Image* ( ...
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A:Work done by the engine of the car is equal to the change in its K.E. B:Internal forces can increase the K.E. of the system (i)Both true,B is the correct explanation of A (ii)Both true B is not the correct explanation of A ...
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Let\ f:R^{+}\rightarrow R\ be\ a\ strictly\ increasing\ function\ such\ that\ f(x)>-\frac{1}{x}\forallx>0\\ And\ also\ f(x).f\left(f(x)+\frac{1}{x}\right)=1\\ \\ Match\ the\ following:\\ \\ f(1)=\\ f_{max}x\ in\ [1,2]=\ ...
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There are n urns each containing n + 1 balls such that the ith urn contains i white balls and ( n + 1 - i ) red balls. Let *Image* be the event of selecting ith urn, i = 1, 2, 3 ..., n and w denotes the events of getting a wh ...
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How to find the image of a point wrt a plane? ...
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If f(2)=2 ,f'(2)=1 Find *Image* ...
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A blown up balloon has a volume of 500ml at 278 K.The balloon is distended to its maximum stretching capacity.Determine the min temp above which it will brust. ...
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A screen is placed at a certain distance from a narrow slit which is illuminated by a parallel beam of monochromatic light of wavelength λ. if d is the width of the slit,what is the angular width of the central maximum? ...
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Why can't two independent sources of light be coherent? ...
