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1. When guitarist Nigel Tufnel turns his amplifier up to 11, it has a power output...

1. When guitarist Nigel Tufnel turns his amplifier up to 11, it has a power output of 110 watts. What is the sound intensity heard from this amp by the lead singer David St. Hubbins when he is 2.4 meters away?

2. Two trumpet players are both playing a pitch with a frequency of 440 Hz, corresponding to the musical pitch A above middle C. However, one of the trumpet players is marching away from you, and one is marching towards you at the same speed. If you hear a eat frequency of 4.00 Hz from the two trumpets, with what speed are trumpet players moving? (The speed of sound in air is 340m/s)

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