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A ball of density p0 falls from rest from point P onto the surface of a liquid of density p0 in time T. It enters the liquid stops moves up and returns to P in a total time 3T. Neglect viscosity, surface tension and splashing. The ratio p/p0 is equal to

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A ball of density p0 falls from rest from point P onto the surface of a liquid of density p0 in time T. It enters the liquid stops moves up and returns to P in a total time 3T. Neglect viscosity, surface tension and splashing. The ratio p/p0 is equal to

Anonymous User tag : Physics 01 Aug, 2019 1 Answer 65 views

An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequency of the sound heard by him before and after the engine across him is

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An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequency of the sound heard by him before and after the engine across him is

Anonymous User tag : Physics 01 Aug, 2019 0 Answer 56 views

A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The two are co-planar when current in the coil increases from zero to i, the total charge circulating in the ring is

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A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The two are co-planar when current in the coil increases from zero to i, the total charge circulating in the ring is?

Ashish Maurya tag : Physics 01 Aug, 2019 1 Answer 157 views

hc

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Sample of 2,3 dibromopentane is heat in zinc dust the resulting compound is isolated and heated with hi in presence of p to yield---------

Anonymous User tag : Chemistry 14 Jul, 2019 1 Answer 57 views

In a crystal structure of an element, atoms are present in ccp arrangement and tetrahedral voids, which of the following relation between the atomic radius and edge length is correct for the unit cell which is formed in this arrangement? (a is the edge length and R is the radius of atom)

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In a crystal structure of an element, atoms are present in ccp arrangement and tetrahedral voids, which of the following relation between the atomic radius and edge length is correct for the unit cell which is formed in this arrangement? (a is the edge length and R is the radius of atom)

Anonymous User tag : Chemistry 12 Jul, 2019 1 Answer 63 views

The focal length of the objective of a microscope is 2cm.The final image of object placed 3cm from the objective is formed at least distance of the distinct vision.if the magnifying power is 10 then calculate focal length of eyepiece.

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The focal length of the objective of a microscope is 2cm.The final image of object placed 3cm from the objective is formed at least distance of the distinct vision.if the magnifying power is 10 then calculate focal length of eyepiece.

Anonymous User tag : Physics 08 Jul, 2019 1 Answer 64 views

A copper rod of length L and mass m is sliding down a smooth inclined plane of inclination theta angle with a constant speed v.  A current I is flowing in perpendicular to the plane of diagram inwards. A vertically upward magnetic field B exists in this region. The magnitude of the required magnetic B is?

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A copper rod of length L and mass m is sliding down a smooth inclined plane of inclination  with a constant speed v.  A current I is flowing in perpendicular to the plane of diagram inwards. A vertically upward magnetic field B exists in this region. The magnitude of the required magnetic B is?

 

 

Anonymous User tag : Physics 07 Jul, 2019 1 Answer 69 views

Two blocks of masses 6kg and 4kg connected by a  rope of mass 4 kg are resting on frictionless floor as shown. If a constant force of 21 Newton is applied to 6 kg block, tension (In N) in the rope at point B is (CB : BA = 1 : 1)

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Two blocks of masses 6kg and 4kg connected by a  rope of mass 4 kg are resting on frictionless floor as shown. If a constant force of 21 Newton is applied to 6 kg block, tension (In N) in the rope at point B is (CB : BA = 1 : 1)

Anonymous User tag : Physics 01 Jul, 2019 1 Answer 200 views

The electron of hydrogen atom was excited from ground state to a higher orbit. During de-excitation of the electron, photons of six different wavelengths were emitted. If each photon forms a spectral line, how many spectral line will be visible to naked eye?

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The electron of hydrogen atom was excited from ground state to a higher orbit. During de-excitation of the electron, photons of six different wavelengths were emitted. If each photon forms a spectral line, how many spectral line will be visible to naked eye?

Anonymous User tag : Chemistry 23 Jun, 2019 1 Answer 61 views

For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is ?

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For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is ?

Rahul Kumar tag : Chemistry 21 Jun, 2019 1 Answer 131 views

A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 10^4 V/m, the charge density of the positive plate will be close to

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A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 10000 V/m, the charge density of the positive plate will be close to

Jitendra Mishra tag : Physics 17 Jun, 2019 1 Answer 65 views

rotation

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The mi of a rod abt an axis through its axis and perpendicular to it is 1/12ml^2 the rod bent in middle so that 2 halves make angle 60 mi of bent rod abt same axis is

Anonymous User tag : Physics 05 Jun, 2019 0 Answer 58 views

rotation

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a square is made by joining 4 rods each of mass m and length its mi abt an axis pq in its plane and is passing through 1 of its end

Anonymous User tag : Physics 05 Jun, 2019 1 Answer 64 views