Physics
What are the particles emitted by radioactive element after 3 consecutive disintegration?

2 beta 1 alpha
1 alpha 1 beta
2 beta 2 alpha
2 alpha 1 beta

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Physics
The wall of a dam is broader at the base

To withstand pressure that is increased with atmospheric pressure
To withstand pressure that increases in a horizontal plane
Because streamlining is required
To withstand pressure that increases with depth

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