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A loudspeaker at a rock concert generates 10-2 W/m2 at 22.0 m at a frequency of 1.0 kHz. Assume that the speaker spreads its energy uniformly in three dimensions.
(a) What is the total acoustic power output of the speaker?
in W
(b) At what distance will the intensity be at the pain threshold of 1.0 W/m2?
in m
(c) What is the intensity at 35.0 m?
in W/m2
A father racing his son has three-fifths the kinetic energy of the son, who has one-third the mass of the father. What is the original speed of the father
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State the direction as an angle with respect to the +x axis.
Water flows through a pipe with circular cross section. The fluid has a radius of 5.0 cm and flows at 2.0m/s. The output has a radius of 2.50 cm. find the output velocity.
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A cardiac pacemaker can be affected by the static magnetic field as small as 1.7 mT. How close can a pacemaker wearer come to a long, straight wire carrying 19 A.
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