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Which of the following statement(s) is (are) correct ? (A) The rest mass of a stable nucleus is less than the

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The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true?

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Photoelectrons are emitted when 400 nm radiation is incident on a surface of work function 1.9eV.

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The ratio of series limit wavelength of Balmer series to wavelength of first line of paschen series is ……….

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A parallel beam of uniform, monochromatic light of wavelength 2640 A has an intensity of 200W/m2 . The number of photons in 1mm3 of this radiation are ….

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A aeroplane is flying horizontally with speed of 432 km/hr at height h meter from ground. Its angle of elevation

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Mass of Li3+ is 8.33 times mass of proton Li3+ and proton are accelerated through same potential difference. Then ratio of debroglie's

asked Apr 12, 2021 in Physics by Topper11 (2.8k points)

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The gas evolved due to anaerobic degradation of vegetation causes?

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Is Maharashtra board exam 2021 postponed ?

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If A and B are two skew-symmetric matrices of order n, then, (a) AB is a skew-symmetric matrix

asked Apr 12, 2021 in Chapter1:Rotational Dynamics by Topper11 (2.8k points)

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If A=[ 1 2 2 2 1 2 2 2 1] and A^-1 exists and A≠0 , then (A^2-4A)A^-1=

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A stationary body explodes into two fragments each of rest mass 1kg that move apart at speeds of 0.6c relative to the original body

asked Apr 11, 2021 in Physics by Doubtly (98.9k points)

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Find the initial momentum of electron if the momentum of electron is changed by pm and the De Broglie wavelength associated with it changes by 0.50 %

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Given that x = -9 is a root of ||The other two roots are ______ and ________ .

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If the lines ax + y + 1 = 0, x + by + 1 = 0 and x + y + c = 0 (a, b, c being distinct and different from 1 ) are concurrent, then value of

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The top of a ladder 6 metre long is resting against a vertical wall on a level pavement,

asked Apr 11, 2021 in mathematics by Doubtly (98.9k points)

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How to square easily fastest method vedic maths

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[MCQ ] Molecular solids are __________ crystalline solids amorphous solids

asked Apr 10, 2021 in Chapter1:Rotational Dynamics by anonymous

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Niobium forms bcc structure the density of niobium is 8.55 g/cm3 and length of unit cell edge

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Alluminium crystallizes in cubic close packed structure with unit cell edge 353.6 pm

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