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Q1. An owl is chasing a squirrel and is using echolocation (the reflection of sound) to aid in the hunt. If the squirrel is 40.5 m from the owl, how long does it take sound to travel from the owl to the squirrel and then back to the owl? (Use 343m/s as the speed of sound in air.)

Q2. A turntable with a moment of inertia of 5.20 kg • m2 rotates freely with an angular speed of 33 1/3 rpm. Riding on the rim of turntable, 16.0 cm from the center, is a cute, 3.2-g mouse.

If the mouse walks to the center of turntable, will the turntable rotate faster, slower, or at same rate? Explain.

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