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Q. A cannon tilted upward at angle = 35 fires a cannonball with a speed of 90 m/s. At that instant, what is the component of the cannonball's velocity parallel to the ground?

Q. A 1 m rod of pure copper 1 cm2 in cross section connects a 200 oC thermal reservoir with a 0 oC thermal reservoir. The system has already reached steady state. What is the rate of change entropy of the first reservoir?

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