Physics
The nature of fuse wire is

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

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Physics
Water pipes in hilly areas often burst on a cold frosty night, because

Frost makes the pipes rusty, so they break
The material of which pipes are made contracts due to cold and so breaks
None of these
Water in the pipes freezes and on freezing water expands, so pipes break

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Physics
The mass defect is the result of what action occurring?

Mass being converted to energy when protons and neutrons bind together in a nucleus
Energy being converted into moles of atoms when neutrons break apart protons
Mass being converted to energy when protons and neutrons break apart in a nucleus
Protons and electrons being attracted to each other

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