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why ∂S = 0 (ENTROPY CHANGE) for reversible adiabatic expansion and compression. ...
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a transverse wave is described by the equation A sin2(wt - kx ). the maximum particle velocity is equal to wave velocity if the value of A is ...
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N concentric thin conducting shells having radius R , R/2 , R/22 , ...... is placed . N th shell is earthed . if Q charge is given to the outer shell , find the charge on the inner most shell . ...
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the locus of the point of intersection of the lines x/a +y/b = m & x/a - y/b = 1/m , where m is a parameter , is always : (a)a circle (b) a parabola (c) a ellipse (d) a hyperbola ...
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the penetrating power of protons is (a) greater than neutrons (b) lesser than electrons (c) greater than elecrons (d) none of these ...
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the number of straight lines that are equally inclined to the three dimensional co-ordinate axis ,is ...
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if z-axis is the molecular axis then the p-molecular orbitals are formed by the overlap of (a) 2s and 2px (b) 2px and 2pz (c) 2px and 2px (d) 2py and 2pz ...
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the angle b/w the lines whose direction cosines satisfy the equations l + m + n = 0 , l2 + m2 - n2 = 0 is given by ...
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The bob of a simple pendulum is a hollow sphere filled with water . how will the period of oscillation change if the water begins to drain out of the hollow sphere ? ...
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what is the frequency of the K.E of a body in S.H.M if the time period of S.H.M is T ? ...
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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 ...
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In triangle ABC , the minimum value of tan2A/2 + tan2B/2 + tan2C/2 is equal to ...
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statement1 - a liquid cannot emerge in the form of a fountain from the upper end of a short capillary tube, kept immersed in water. statement2 - if the length of the tube is h' , is less than the rise h , the liquid would spr ...
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a person brings a mass of 1 kg from infinity to a point A. Initially the mass was at rest but it moves at a speed of 2 m/s as it reaches A. The work done by the person on the mass is -3 J. The potential at A is ........ pls g ...
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how much time is required fr complete decomposition of 4 moles of water using 4 amperes ? ...
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is rank of matrix in jee syllabus or not ...
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about what axis would a uniform cube have its minimum and max moment of inertia . explain pls the approach of solving it. ...
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voltmeters V1 and V2 are connected in series across a d.c. line . V1 reads 80V and has a per volt resistance of 200 ohm , V2 has a total resistance of 32000 ohm . the line voltage is ...
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a body can hav kinetic energy without having linear momentum . how is it possible......... explain pls ...
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if x , y , z > 0 then the value of x/y + y/z + z/x lies in the interval ...
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if the direction ratios of two lines are given by 3lm -4ln + mn = 0 and l + 2m + 3n = 0 , find the angles between them ...
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in triangle ABC the coordinates of the vertex A are (4, -1) and the lines x-y-1=0 and 2x-y-3=0 are internal bisectors of angles B and C then , radius of incircle of triangle ABC is ...
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a positive charge q is placed in front of a conducting solid cube at a distance d from its centre. find the electric field at the centre of the cube due to the charges appearing on its surface. ...
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if the asymptote of the hyperbola (x+y+1)2 - (x-y-3)2 = 5 cuts each other at A and the coordinate axis at B and C then radius of circle passing through the points A, B ,C is ...
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wat is the capacitance when inner sphere is earthed and outer sphere is charged ? also show hw to found it ...
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25. A rod of length L is held vertically on a smooth horizontal surface. The top end of the rod is given a gentle push. At a certain instant of time, when the rod makes an angle ∂ with horizontal the velocity of COM of the ...
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in the case of the differential eq of all non-horizontal lines in a plane we take ax+by =1 and then differentiate it twice with respect to y , and in the case of all non-vertical lines in a plane we differentiate the above eq ...
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a ball is thrown upwards from the surface of earth . while the ball is moving up, (a) the earth remains stationary while the ball moves upwards (b) the ball remains remain stationary while the earth moves downwards (c) the ba ...
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if f: R-R is a function satisfying the property f(2x+3) + f(2x+7) = 2 for all x belongs to R , then the period of f(x) is ...
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in the electronic structure of sulfhuric acid , the total number of unshared electrons is ....... also explain it ...
