Physics
Electrical burns occur principally because of

Radiation pulses of the electricity
The high energy of electrons
The heat generated by the flow of electrical current through the body
All of these

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Physics
The blue colour of water in the sea is due to

Reflection of blue sky by sea water
Scattering of blue light by water molecules
Absorption of other colours except blue by water molecules
Reflection of blue light by impurities in sea water

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