# Introduction to Physical Science

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When a cannon with a longer barrel is fired, the force of expanding gases acts on the cannonball for a longer distance. What effect does this have on the velocity of the emerging cannonball? (Do you see why long-range cannons have such long barrels?)

• Introduction to Physical Science -

what effect can it possibly have?

increase
decrease
unaffected

The very language of the question gives away the answer.

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