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find the wavelength of a train whistle heard by a fixed observer as the train moves toward the observer with a velocity
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assume the marginal cost of production is greater than the average variable cost can you determine whether the average
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1 a hair dryer draws a current of 115 aa how much charge passes through the hair dryer in 35 minb how many electrons
two rods one made of brass and the other made of copper are joined end to end the length of the brass section is 0160 m
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a white dwarf is the cooling remnant of a star similar to our sun a particular white dwarf has a temperature of 16155 k