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Hassan is driving his truck with a velocity of 18m/s towards a mountain. Kevin who is
riding in the truck sounds a horn. The sound reflects from the cliff and is heard by
Hassan and Kevin on the truck. What is the change in frequency in hertz if the horn had
an initial wavelength of )=0.101 m? The temperature that day was 35 degrees
celsius. (Speed of sound = 331+0.6 T(in celsius)). Please give your answer as a whole
number.

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