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Q. An artillery shell is fired with a minimal velocity of 470m/s at 50o above the horizontal. To clear an avalanche, it explodes on a mountain side 38 s after firing.

What is the X-coordinate relative to its firing point?

Q. A 2.60 multiplied by 102 g sample of water at 80°C is mixed with 2.60 multiplied by 102 g of water at 25°C. Suppose no heat loss to the surroundings. What is the final temperature of the mixture?

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