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A solid sphere of radius r1 = 20 mm is placed concentrically inside a hollow sphere of radius r2 = 30 mm as shown in the figure. (Gate mechanical engineering 2014)1 AnswerA spherical metal A of radius RA and a solid metal sphere B of radius RB (< RA) are kept far apart and each is given charge ‘+Q’. Now they are connected by a thin metal wire. Then -jee main 2012 physics 1 AnswerFind the equation of the sphere through the point (2,0,1), (1,-5,-1), (0,-2,3) and (4,-1,2). Also find its centre and radius1 AnswerThe dimensions of a solid iron cuboid are 4.4 m × 2.6 m × 1.0 m. It is melted and recast into a hollow cylindrical pipe of 30 cm inner radius and thickness 5 cm. Find the length of the pipe. Mathematics CBSE class 10 20171 AnswerIf the radius of a sphere is doubled then what is the ratio of their volumes? CBSE class 9 Mathematics1 AnswerFind the radius of a sphere whose surface area is 154cm2. CBSE class 9 Mathematics 1 AnswerA circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is -Mechanical Engineering-gate-20121 AnswerAn annular disc has a mass m, inner radius R and outer radius 2R. The disc rolls on a flat surface without slipping. If the velocity of the centre of mass is v, the kinetic energy of the disc is: (-Gate mechanical 2014)1 AnswerAn infinitely long hollow conducting cylinder with inner radius R/2 and outer radius R carries a uniform current density along its length. The magnitude of the magnetic field, | B | as a function of the radial distance r from the axis is best represented by - jee main 2012 physics 1 AnswerThe moment of inertia of a solid sphere about a tangent is 2/5 MR^2. Find its moment of inertia about its diameter. -Physics Cbse class 11 1 AnswerFill in the blank: GATE-Biotechnology-20171 AnswerThe drag force, FD, on a sphere kept in a uniform flow field depends on the diameter of the sphere, D; flow velocity, V; fluid density, ρ; and dynamic viscosity, µ. Which of the following options represents the non-dimensional parameters which could be used to analyze this problem? - gate civil 2017 1 AnswerA four-wheel vehicle of mass 1000 kg moves uniformly in a straight line with the wheels revolving at 10 rad/s. The wheels are identical, each with a radius of 0.2 m. Then a constant braking torque is applied to all the wheels and the vehicle experien1 AnswerA solid wooden toy is in the form of a hemisphere surrounded by a cone of same radius. The radius of hemisphere is 3.5 cm and the total wood used in the making of toy is 166 (5/6) cm^3. Find the height of the toy. ALso find the cost of painting the h1 AnswerA force P is applied at a distance x from the end of the beam as shown in the figure. What would be the value of x so that the displacement at ‘A’ is equal to zero? (-Gate mechanical engineering 2014)1 AnswerA pipe of 25mm outer diameter carries steam. -gate-mechanical-20111 AnswerThe diameter of a recessed ring was measured by using two spherical balls of diameter d2 =60 mm and d1=40 mm as shown in the figure. (-Gate mechanical engineering 2014)1 AnswerFind the volume of wood in the toy. Mathematics CBSE class 10 20131 Answern the steel structure (Young’s modulus = 200 GPa) shown in the figure, all members have a circular cross-section of radius 10 mm. Column BD is pinned at B and D. The support at A is hinged. The minimum value1 AnswerA sphere of diameter 12 cm, is dropped in a right c ircular cylindrical vessel, partly filled with water. If the sphere is completely submerged i n water, the water level in the cylindrical vessel rises by 359 cm. Find the diamet er o1 Answer