15 5-A child releases a balloon at a park. The balloon travels up into the air 9 m, and east across the park a distance

of 20 m, before getting stuck in a tree. What is the resultant displacement of the balloon? Express your answer in

components, and then determine the magnitude.

ANSWER

Q X, X

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5 met

9

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An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)