PCS 125 Midterm: PCS125 2013 midterm solutions
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Multiple choice questions: a mass on a spring has an angular oscillation frequency of 2. 56 rad/s. The elevator is accelerating upwards with acceleration a. The period of this pendulum, in terms of its length l, g, and a is: 2 (l/g)1/2, 2 [l/(g+a)] 1/2, 2 [l/(g-a)] 1/2, 2 (g+a/l) 1/2, (1/2 )(g/l) 1/2. Determine the first positive x-coordinate for which y is at its maximum value when t. = 0. a. 16 m: 8 m, 4 m, 2 m, 13 m y. Obtained from ryerson"s mechanical engineering course union (mecu) www. ryemecu. com: a pulsed wave is described by the equation txy. When the tension is slowly increased the standing wave disappears until tension t2 is reached, there being no resonances occurring between these two tensions. How many antinodes are there in this new resonance: 2, 3, 4, 5, 6, an observer stands 3 m from speaker a and 5 m from speaker b. Both speakers, oscillating in phase, produce 250 hz waves.
