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

Correct Answer: Bernoulli's principle

Explanation:

The rapid flow of air between the two moving ships causes a reducton of pressure (Bernoulli's principle) , so they (the ships) are drawn closer together

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