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

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

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Should be in the form of a vertical rod
Should be made of a good conductor but can be of any shape
Should be made of a good conductor like copper with sharp-pointed edges
Can be of any shape

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