Physics
Which of the following is not a property of heavy water ?

It produces corrosion
Boiling point of heavy water is lower than that or ordinary water
Density of heavy water is higher than that of ordinary water
Freezing point of heavy water is higher than that of ordinary water

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Physics
The nature of fuse wire is

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

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