Physics
Fuse wire is made of an alloy of

Lead and Copper
Tin and Copper
Tin and Lead
Copper and Silver

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Physics
What is the principle of a ''Life Jacket"?

It decreases the volume of the person to keep him afloat
It provides oxygen to a drowning person
The person can sit on it like a raft
It increases the volume of the person to keep him afloat

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