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Name: PHYS122 Quiz 2 1. A friend of yours is loudly singing a single note at 400 Hz while driving towards you at 25.0 m/s on a day when the speed of sound is 340 m/s. a. What frequency do you hear? b. What frequency does your friend hear if you suddenly start singing at 400 Hz? 2. The sound intensity from a jack hammer breaking concrete is 2.0 W/m2 at a distance of 2.0 meters from the point of impact. This is sufficiently loud to cause permanent hearing damage if the operator doesn’t wear ear protection. Calculate the following at a distance of 50.0 meters away: a. The sound intensity b. The sound intensity level
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