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Unformatted text preview: Bi < 0.1 s 204 = ⎯→ ⎯ = − − ⎯→ ⎯ = − − = ° ° = = = − − ∞ ∞ t e e T T T t T L C h V C hA b t bt i c p p s ) s 0136 . ( 13 21 30 350 30 50 ) ( s 0136 . m) C)(0.00075 J/kg. 383 )( kg/m (8950 C . W/m 35 ρρ ( b ) The wire travels a distance of m 34 = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = ⎯→ ⎯ = s) (204 s/min 60 m/min 10 length time length velocity This distance can be reduced by cooling the wire in a water or oil bath. ( c ) The mass flow rate of the extruded wire through the air is kg/min 633 . m/min) 10 ( m) 0015 . ( ) kg/m 8950 ( ) 4 / ( 2 3 2 = = = = πρρ V r V m & & Then the rate of heat transfer from the wire to the air becomes W 1212 = kJ/min 72.7 = C ) 50 350 )( C kJ/kg. 383 . )( kg/min 633 . ( ] ) ( [ ° − ° = − = ∞ T t T C m Q p & & 4103...
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This note was uploaded on 01/19/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Mass, Heat

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