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22 Ne nucleus, after absorbing energy, decays into two α-particles and an unknown nucleus. The unknown nucleus is

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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

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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

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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

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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,

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How to square easily fastest method vedic maths

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[MCQ ] Molecular solids are __________ crystalline solids amorphous solids

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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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