Unformatted text preview: gth enters a tube as shown. What is be the smallest
radius r such that a minimum is heard by the detector? Source end r Detector end 5. A truck traveling at 100km/hr down a highway blows its horn after it passes a car
traveling at 80km/hr. The driver of the car hears 250Hz. What frequency is heard by the
driver of the truck?
6. A harmonic oscillator with natural period of 2.0s is placed in an environment where its
motion is damped, with damping force proportional to its speed. The amplitude of the
oscillation drops to 70% of its original value in 5.0s. What is the period of oscillator in the
7. The glass from a basement window is replaced by a sheet of asbestos that is 2.0cm thick
and has thermal conductivity of 0.80 ⇥ 10 1 W/m K . The window is 80cm wide and 40cm
high and there is no air leakage around the edges. Given that the heat loss through the
surface is 0.06J/s what i...
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- Winter '13