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560_Physics ProblemsTechnical Physics

560_Physics ProblemsTechnical Physics - 562 P19.49...

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562 Temperature P19.49 The frequency played by the cold-walled flute is f v v L i i i = = λ 2 . When the instrument warms up f v v L v L T f T f f f i i = = = + = + λ α α 2 2 1 1 a f . The final frequency is lower. The change in frequency is f f f f T f v L T T v L T f i f i i i = = + F H G I K J = + F H G I K J × ° ° = 1 1 1 2 1 2 343 24 0 10 15 0 2 0 655 0 094 3 6 α α α α a f b g e j a f a f m s C C m Hz . . . . This change in frequency is imperceptibly small. P19.50 (a) P V T P V T 0 = ′ = + ′ = + + F H G I K J + = F H G I K J × + × × + = × × F H G I K J + = = ± = V V Ah P P kh A P kh A V Ah P V T T h h h h h 0 0 0 5 5 3 5 3 2 1 013 10 2 00
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