problem17_46

University Physics with Modern Physics with Mastering Physics (11th Edition)

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17.46: a) Let the man be designated by the subscript m and the “‘water” by w, and T is the final equilibrium temperature. w w w m m m T C m T C m = - ( 29 ( 29 w w w m m m T T C m T T C m - = - - ( 29 ( 29 w w w m m m T T C m T T C m - = - Or solving for T , . w w m m w w w m m m C m C m T C m T C m T + + = Inserting numbers, and realizing we can change K to C ° , and the mass of water is .355 kg, we get ) kg J 4190 ( kg) 355 . 0 ( ) kg. J 3480 ( kg) 0 . 70 ( ) 0 . 12 ( ) kg J 4190 ( kg) 355 . 0 ( ) 0 . 37 ( ) K kg J 3480 ( kg) 0 . 70 ( C C C C C T ° + ° °
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Unformatted text preview: ⋅ + ° ⋅ = Thus, . 85 . 36 C T ° = b) It is possible a sensitive digital thermometer could measure this change since they can read to . C 1 . ° It is best to refrain from drinking cold fluids prior to orally measuring a body temperature due to cooling of the mouth....
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  • final equilibrium temperature, kg °C

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