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A beam of alpha particles (q=+2e) is dir...

A beam of alpha particles `(q=+2e)` is directed at a uranium`(Z=92)` target. The radius of a uraniumnucleus is `7.4fm`. The closest approach between centers of an alpha particle of a uranium is `30.0fm`. The kinetic energy (in MeV) of the incident alpha particles is closest to:

A

The ionic crystal of `AgBr` may have schottky defect

B

Amorphous solid are isotropic

C

Packing fraction of 2D-hcp packing is 0.74

D


`uarr uarr uarr uarr` represents magnetic moment of ferromagnetic substance.

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