## A sample of a gas initially at 27°C is compressed from 40 litres to 4 litres adiabatically and reversibly. Calculate the final temperature (Cv = 5 cal/mole) A sample of a gas initially at 27°C is compressed from 40 litres to 4 litres adiabatically and reversibly. Calculate the final temperature (Cv = 5 cal/mole)

Anonymous User tag : Chemistry 10 Nov, 2019 71 views

## Copper sulphate solution (250 ml) was electrolyzed using a platinum anode and copper cathode. A constant current of 2 mA was passed for 16 minute. It was found that after electrolysis, the absorbance of the solution was reduced to 50% of its original value. Calculate the concentration of copper sulphate ion in the solution to begin with. Copper sulphate solution (250 ml) was electrolyzed using a platinum anode and copper cathode. A constant current of 2 mA was passed for 16 minute. It was found that after electrolysis, the absorbance of the solution was reduced to 50% of its original value. Calculate the concentration of copper sulphate ion in the solution to begin with.

Anonymous User tag : Chemistry 10 Nov, 2019 65 views

## Number of ways in which 7 girls & 7 boys can be arranged such that no two boys and no two girls are together is? Number of ways in which 7 girls & 7 boys can be arranged such that no two boys and no two girls are together is?

Anonymous User tag : Maths 09 Nov, 2019 73 views

## U=√T/m। T=Mg। M=२Kg। m = 1.5g/m v=? Percentage error Anonymous User tag : Mathematical physics 06 Nov, 2019 59 views

## The configuration of the C-2 epimer of D-glucose is? The configuration of the C-2 epimer of D-glucose is

Anonymous User tag : Chemistry 05 Nov, 2019 91 views

## In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.......? In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.......?

Anonymous User tag : Chemistry 02 Nov, 2019 80 views

## Consider a parabola x2 = 4y and a hyperbola xy = 1. A tangent is drawn to parabola meets the hyperbola in A and B then locus of midpoint of AB is Consider a parabola and a hyperbola XY = 1. A tangent is drawn to parabola meets the hyperbola in A and B then the locus of midpoint of AB is

Anonymous User tag : Maths 01 Nov, 2019 91 views

## The total number of 1 word, 2 word, 3 word sentences that can be formed using the letters of the word SAMSUNG is? The total number of 1 word, 2 word, 3 word sentences that can be formed using the letters of the word SAMSUNG is?

Anonymous User tag : Maths 30 Oct, 2019 86 views

## For n => 3 circles, the value of n for which the number of radical axis is equal to number of radical centres is? For n => 3 circles, the value of n for which the number of the radical axis is equal to number of radical centres is?

Anonymous User tag : Maths 29 Oct, 2019 70 views

## A compound is composed of two elements A and B, element A constitute f.c.c. lattice, while B occupy all the tetrahedral voids, in this way another simple cubic is constituted by element B, inside the fcc unit cell of element A. If all the points/particles along any one edge of inner cube of every unit cell, are missing then what is the new empirical formula of the compound A compound is composed of two elements A and B, element A constitute f.c.c. lattice, while B occupy all the tetrahedral voids, in this way another simple cubic is constituted by element B, inside the fcc unit cell of element A. If all the points/particles along any one edge of inner cube of every unit cell, are missing then what is the new empirical formula of the compound?

Anonymous User tag : Chemistry 29 Oct, 2019 89 views

## The specific heat capacity of a monoatomic gas for the process T*V*V = constant is (where R is gas constant)? The specific heat capacity of a monoatomic gas for the process T*V*V = constant is (where R is gas constant)?

Anonymous User tag : Physics 28 Oct, 2019 182 views

## A block of mass 2 kg is attached to one end of a massless rod of length 1/22/7 m . The rod is fixed to a horizontal plane at the other end such that the block and rod are free to revolve on a horizontal plane. The coefficient of friction between the block and surface is 0.1. Block is made to rotate with uniform speed by applying a constant external force in tangential direction on the block. The work done by external force when the rod rotates by 90 degreeis A block of mass 2 kg is attached to one end of a massless rod of length . The rod is fixed to a horizontal plane at the other end such that the block and rod are free to revolve on a horizontal plane. The coefficient of friction between the block and surface is 0.1. Block is made to rotate with uniform speed by applying a constant external force in tangential direction on the block. The work is done by external force when the rod rotates by 90 degree is

Anonymous User tag : Physics 25 Oct, 2019 225 views

## In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.? In low temperature range fraction of heat supplied to an ideal diatomic gas system, at constant pressure, which bring change in its internal energy is approx.?

Anonymous User tag : Chemistry 25 Oct, 2019 62 views

## The area enclosed between the curves y = sin2x and y = cos2 x in the interval 0 <= x <= pie is

The area enclosed between the curves Swati gupta tag : Maths 20 Oct, 2019 67 views

## A block is suspended by an ideal spring constant K. If the block is pulled down by constant force F and if maximum displacement of block from it’s initial position of rest is z, then A block is suspended by an ideal spring constant K. If the block is pulled down by constant force F and if the maximum displacement of the block from it’s the initial position of rest is z, then find the value of z

Anonymous User tag : Physics 18 Oct, 2019 133 views

## Resonance Energy of Toluene is 37.5 kcal/mol while that of Benzene is 36 kcal/mole then which of the following explains this difference? Resonance Energy of Toluene is 37.5 kcal/mol while that of Benzene is 36 kcal/mole then which of the following explains this difference?

Anonymous User tag : Chemistry 18 Oct, 2019 68 views

## A rod of mass 10kg with some point masses tied to it at different positions.Find the distance of the point at which if the rod is picked over a knife edge,it will be in equilibrium about the knife edge Anonymous User tag : Physics 17 Oct, 2019 106 views

## If A is the areal velocity of planet of mass M, its angular momentum is? If A is the areal velocity of planet of mass M, its angular momentum is?

Anonymous User tag : Physics 15 Oct, 2019 86 views

## In a hypothetical concept, electron of mass me revolveds around nucleus due to gravitational force of attraction between electron and proton of mass mp. If the radius of circular path of electron is r then the speed of electron is ? In a hypothetical concept, electron of mass me revolveds around nucleus due to gravitational force of attraction between electron and proton of mass mp. If the radius of circular path of electron is r then the speed of electron is ?

Anonymous User tag : Physics 15 Oct, 2019 73 views

## Three particles, each of mass 10^-2 kg are brought from infinity to the vertices of an equilateral triangle of side 0.1 m, the work done is : Three particles, each of mass 10^-2 kg are brought from infinity to the vertices of an equilateral triangle of side 0.1 m, the work done is :

Anonymous User tag : Physics 15 Oct, 2019 170 views

## Masses of three wires are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is? Masses of three wires are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1. The ratio of their electrical resistance is?

Anonymous User tag : Physics 15 Oct, 2019 77 views

## A potential difference of V is applied at the ends of a copper wire of length l and diameter d. On doubling only d, drift velocity A potential difference of V is applied at the ends of a copper wire of length l and diameter d. On doubling only d, drift velocity

Anonymous User tag : Physics 14 Oct, 2019 62 views

## The resistance of a wire at 20 C is 20 W and at 500 C is 60W. At which temperature resistance will be 25W The resistance of a wire at 20 C is 20 W and at 500 C is 60W. At which temperature resistance will be 25W

Anonymous User tag : Physics 14 Oct, 2019 59 views

## How three resistance of values 2W, 3W and 6 W can be connected to give an effective resistance of 4W? How three resistance of values 2W, 3W and 6 W can be connected to give an effective resistance of 4W?

Anonymous User tag : Physics 12 Oct, 2019 64 views

## A particle is moving along straight line such that dot product of its acceleration a and velocity v is negative. How many times particle can be found at a distance d from the origin? A particle is moving along a straight line such that dot product of its acceleration a and velocity v is negative. How many times particle can be found at a distance d from the origin?

Anonymous User tag : Physics 09 Oct, 2019 63 views

## Two identical discs of mass m and of radius R touch each other and move with the same velocity perpendicularly to the line segment which joins their centres of mass, along the surface of a horizontal smooth tabletop. There is a third disc of mass M and of radius R at rest, at a point on the perpendicular bisector of the line segment joining the centres of mass of the two moving discs as shown in the figure. The two moving discs collide elastically with the third one, which is at rest. There is no friction between the rims of the discs. What should the ratio of M/m be in order that after the collision the two discs of mass m move perpendicularly to their initial velocity? Two identical discs of mass m and of radius R touch each other and move with the same velocity perpendicularly to the line segment which joins their centres of mass, along the surface of a horizontal smooth tabletop. There is a third disc of mass M and of radius R at rest, at a point on the perpendicular bisector of the line segment joining the centres of mass of the two moving discs as shown in the figure. The two moving discs collide elastically with the third one, which is at rest. There is no friction between the rims of the discs. What should the ratio of M/m be in order that after the collision the two discs of mass m move perpendicularly to their initial velocity? Anonymous User tag : Physics 09 Oct, 2019 66 views

## Ram travels towards east covering 5 km. He takes a left turn and travels 10 km more. Then, he takes a right turn and travels another 5km and finally takes a right turn to cover 10 km. How far is he from his original position? Ram travels towards east covering 5 km. He takes a left turn and travels 10 km more. Then, he takes a right turn and travels another 5km and finally takes a right turn to cover 10 km. How far is he from his original position?

Anonymous User tag : Maths 09 Oct, 2019 75 views

## The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person? The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

Anonymous User tag : Maths 09 Oct, 2019 57 views

## CURRENT A WIRE HAS LINEAR RESISTANCE P FIND RESISTANCE R B/W PT A AND B IF SIDE OF LARGER SQUARE IS D

A AND B ARE OPP POINTS ON LARGER SQUARE

Anonymous User tag : Physics 06 Oct, 2019 72 views

## ELECRTOSTATICS 10 uc charge is uniformly distributed over thin ring of radius 1m a particle of mass 0.9 g charge 1uc is placed on axis of ring it is displaced towards centre then time period is

Anonymous User tag : Physics 02 Oct, 2019 78 views

## thermo 1 cm3 of water at its bp absorbs 540 cal of heat to become stream with vol of 1671 cm3 if atmpressur1.013 *10^5 n/m2 and mechanical equivalent of heat =4.19 j/cal energy spent in this process in over coming intermolecular forces

Anonymous User tag : Physics 01 Oct, 2019 78 views

## thermo A cylindrical rod with one end in a stream chamber and other end in ice cause melting of 0.1 gm of ice/sec. If the rod is replaced with another rod of half the length and double the radius of first and thermal conductivity of second rod is 1/4 that of first, find the rate of ice melting in gm/sec

Anonymous User tag : Mathematical physics 29 Sep, 2019 71 views

## Define 'electric line of force' and give its two important properties? Define 'electric line of force' and give its two important properties?

Anonymous User tag : Physics 29 Sep, 2019 78 views

## A particle moves in a straight line such that the distance covered by it in time t seconds measured t3 from a fixed point on the line is given by s = t^3/3- 16t cms. The acceleration when the velocity is zero is A particle moves in a straight line such that the distance covered by it in time t seconds measured t3 from a fixed point on the line is given by The acceleration when the velocity is zero is

Anonymous User tag : Maths 28 Sep, 2019 63 views

## How many acyclic isomer(s) is/are possible with formula C4H8? How many acyclic isomer(s) is/are possible with formula C4H8?

Anonymous User tag : Chemistry 28 Sep, 2019 57 views

## How many minimum number of chlorine atom(s) does a polychloride contain, which on hydrolysis forms a beta - keto acid? How many minimum numbers of chlorine atom(s) does a polychloride contain, which on hydrolysis forms a beta - keto acid?

Anonymous User tag : Chemistry 28 Sep, 2019 64 views

## A wire of length l and resistance R is bent in the form of a ring. The resistance between two points which are separated by angle is? A wire of length l and resistance R is bent in the form of a ring. The resistance between two points which are separated by angle is?

Anonymous User tag : Physics 24 Sep, 2019 84 views

## Volume of a gas at a particular temperature and on atmospheric pressure is 200 ml. Keeping the temperature constant if pressure is increased to 5 atmosphere, then volume of the gas will be(if P1V1 = P2V2 ) Volume of a gas at a particular temperature and on atmospheric pressure is 200 ml. Keeping the temperature constant if pressure is increased to 5 atmosphere, then volume of the gas will be(if P1V1 = P2V2 )

Anonymous User tag : Chemistry 23 Sep, 2019 71 views

## a stationary obj at 4 deg cal and weighing 3.5kg falls from height of 2000 m on snow mountain at 0 degc if temp of obj just hitting snow is 0 deg and obj comes to rest immediately obj melt at (latent heat of ice=3.5*10^5 j/s) a stationary obj at 4 deg cal and weighing 3.5kg falls from height of 2000 m on snow mountain at 0 degc if temp of obj just hitting snow is 0 deg and obj comes to rest immediately obj melt at (latent heat of ice=3.5*10^5 j/s)

Anonymous User tag : Physics 20 Sep, 2019 87 views

## thermdynamics - how many g of a liquid of speific heat 0.2 at a temp 40 deg cal must be mixed with 100 gm of liquid of speciic heat 0.5 at temp 20 deg cal so that final temp of mix becomes 32 dg cal how many g of a liquid of speific heat 0.2 at a temp 40 deg cal must be mixed with 100 gm of liquid of speciic heat 0.5 at temp 20 deg cal so that final temp of mix becomes 32 dg cal

Anonymous User tag : Physics 19 Sep, 2019 77 views

## A block of mass m is placed on an another rough block of mass M and both are moving horizontally with same acceleration a due to a force which is applied on the lower block, then work done by lower block on the upper block in moving a distance s will be? A block of mass m is placed on an another rough block of mass M and both are moving horizontally with same acceleration a due to a force which is applied on the lower block, then work done by lower block on the upper block in moving a distance s will be?

Anonymous User tag : Physics 15 Sep, 2019 88 views

## A particle moves on a rough horizontal ground with some initial velocity say v0. If (3/4)th of its kinetic energy is lost due to friction in time t0 then coefficient of friction between the particle and the ground is A particle moves on a rough horizontal ground with some initial velocity say v0. If (3/4)th of its kinetic energy is lost due to friction in time t0 then coefficient of friction between the particle and the ground is?

Anonymous User tag : Physics 15 Sep, 2019 195 views

## Two balls are dropped from the same point after an interval of 1 second. Their separation 3 second after the release of the second ball. (g = 10 m/s2) Two balls are dropped from the same point after an interval of 1 second. Their separation 3 second after the release of the second ball. (g = 10 m/s2)

Anonymous User tag : Physics 15 Sep, 2019 59 views

## A string of linear mass density 0.8 kg/m is stretched to a tension 500 N. The mean power required to maintain a travelling wave of amplitude of 10 mm and wavelength 0.5 m is? A string of linear mass density 0.8 kg/m is stretched to a tension 500 N. The mean power required to maintain a travelling wave of amplitude of 10 mm and wavelength 0.5 m is?

Anonymous User tag : Physics 14 Sep, 2019 62 views

## A particle is projected with a speed u in air at angle θ with the horizontal. The particle explodes at the highest point of its path into two equal fragments, one of the fragments moving up straight with a speed u. The difference in time in which the two particle fall on the ground is (Assume it is at a height H at the time of explosion) A particle is projected with a speed u in air at angle θ with the horizontal. The particle explodes at the highest point of its path into two equal fragments, one of the fragments moving up straight with a speed u. The difference in time in which the two particle fall on the ground is (Assume it is at a height H at the time of explosion)

Anonymous User tag : Physics 12 Sep, 2019 58 views

## If inside a big circle exactly 24 small circles, each of radius 2, can be drawn in such a way that each small circle touches the big circle and also touches both its adjacent small circles, then radius of the big circle is? If inside a big circle exactly 24 small circles, each of radius 2, can be drawn in such a way that each small circle touches the big circle and also touches both its adjacent small circles, then radius of the big circle is?

Anonymous User tag : Maths 09 Sep, 2019 82 views

## The differential equation of the system of circles touching the x-axis at origin is? The differential equation of the system of circles touching the x-axis at origin is?

Anonymous User tag : Maths 09 Sep, 2019 59 views

## Two particles of mass M = 3 kg each are kept on a horizontal circular platform on two mutually perpendicular radii at equal distance R = 1 m from the centre of the table. The particles are connected with a string, which is just taught when the platform is not rotating. Coefficient of friction between the platform and block is  = 0.1. Then the maximum angular speed ( in rad/sec) of platform about its centre so that the blocks remain stationary relative to platform. (take g = 10 m/s2) Two particles of mass M = 3 kg each are kept on a horizontal circular platform on two mutually perpendicular radii at equal distance R = 1 m from the centre of the table. The particles are connected with a string, which is just taught when the platform is not rotating. Coefficient of friction between the platform and block is = 0.1. Then the maximum angular speed ( in rad/sec) of platform about its centre so that the blocks remain stationary relative to platform. (take g = 10 m/s2)

Anonymous User tag : Physics 09 Sep, 2019 63 views

## A spring is compressed between two blocks of masses m1 and m2 placed on a horizontal frictionless surface. When the blocks are released. The blocks travel distance x1 and x2 respectively before coming to rest. The ratio x1/x2 is? A spring is compressed between two blocks of masses m1 and m2 placed on a horizontal frictionless surface. When the blocks are released. The blocks travel distance x1 and x2 respectively before coming to rest. The ratio x1/x2 is?

Anonymous User tag : Physics 09 Sep, 2019 89 views