Physics
The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by

Bernoulli's principle
Earth's gravitational force
Magnetic properties of the ship's material
Newton's third law of motion

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Physics
A Fuse wire is characterised by

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

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