Physics, 02.07.2019 02:20 dsaefong00
31. a big 8 kg fish swimming at 3 m/s opens its mouth and swallows a small 2 kg fish swimming
away from it at 1 m/s. presume water resistance is negligible. show your calculations.
(a) what is the momentum of the two fish system after the smaller fish has been
swallowed?
(b) what is the speed of the two fish system after the smaller fish has been swallowed?
(hint: first figure the mass of the two fish system.)
Answers: 3
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Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.
Answers: 2
31. a big 8 kg fish swimming at 3 m/s opens its mouth and swallows a small 2 kg fish swimming
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