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Q. An antitank weapon fires a 3.00 kg rocket which acquires a speed of 50m/s after travelling 90cm down a launching tube. Assume the rocket was accelerated uniformly, what force acted on it?

Q. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20^circ {rm C}? Assume that the air bubble is always in thermal equilibrium with the surrounding water.

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