A 4.5 kg puffer fish expands to 40% of its mass by taking in water. When the puffer fish is threatened, it releases the water toward the threat to move quickly forward. What is the ratio of the speed of the puffer fish forward to the speed of the expelled water backwards?
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A 4.5 kg puffer fish expands to 40% of its mass by taking in water. When the puffer fish is threaten...
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