Physics
Name the process of production of energy in the Sun

Ionization
Nuclear fusion
Radioactivity
Nuclear fission

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Physics
A white and smooth surface is

Bad absorber and bad reflector of heat
Bad absorber and good reflector of heat
Good absorber and good reflector of heat
Good absorber and bad reflector of heat

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Physics
In the process of magnetisation of a bar

Only the surface of the bar gets magnetised
Only some parts of the outer layers of the bar get magnetised
The entire bulk of the bar gets magnetised
Only the ends of the bar get magnetised

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