Physics
Formula for distance is

Speed x time
Velocity / speed
Time / speed
Speed x acceleration

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Physics
Radiocarbon is produced in the atmosphere as a result of

Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Lightning discharge in atmosphere.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
Action of ultraviolet light from the sun on atmospheric oxygen.

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Physics
A Fuse wire is characterised by

High resistance and low melting point
Low resistance and high melting point
High resistance and high melting point
Low resistance and low melting point

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