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A point moves such that the sum of squares of its distances from the four sides of a square is constant;prove that it always lies on a circle. ...
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question in the image *Image* question in the image ...
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question in image ...
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A stone is tied to a string of length l and whirled in a circular path.The speed of the stone at the lowest point is u.Find the magnitude of change in velocity when the string is horizontal? let velocity when string is horizo ...
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question is in the image. please also explain. *Image* question is in the image. please also explain. ...
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If the radical axis of circles {{x}^{2}}+{{y}^{2}}-6x-8y+p=0 and {{x}^{2}}+{{y}^{2}}-8x-6y+14=0 passes through the point (1, – 1), then p is equal to ...
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A thin lens of focal length f and its aperture diameter d, forms a real image of intensity I. Now the central part of the aperture upto diameter (d/2) is blocked by an opaque paper. The focal length and image intensity woul ...
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When a lens of power P ( in air ) made of material of refractive index mu is immersed in liquid of refractive index {{mu }_{0}} . Then the power of lens is: ...
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The locus of the centre of circle which cuts the circles {{x}^{2}}+{{y}^{2}}+4x-6y+9=0 and {{x}^{2}}+{{y}^{2}}-4x+6y+4=0 orthogonally is ...
