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Biology with MasteringBiologyâ„¢ (8th Edition)

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  MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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A standard  atmosphere  has a  pressure  versus  altitude  relation  approximate d by ρ   =  P o , with  α   = An aircraft  flies at   but  maintains a  cabin  pressure of  that at    What force  is exerted by  air pressure  on a square  meter of  cabin wall  area? 
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1)  _______  A) 
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3.5  ×  10 4  N 
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B)  4.1  × 1
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124 N 
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D)  7.6  × 1     2
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A container  has a  vertical tube,  whose inner  radius is  24.00 mm,  connected to  it at its side.  An unknown  liquid  reaches level  A in the  container  and level B  in the tube— level A  being    higher than  level B. The  liquid  supports a  20.0 cm high  column of  oil, between  levels B and  C, whose  density is    In the figure,  the mass of  the oil, in  grams, is  closest to: 
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2)  _______  A) 
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620 
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B) 
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410 
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C) 
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820 
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D) 
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210 
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E)  1 0 0  
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A container  has a  vertical tube,  whose inner  radius is  12.00 mm,  connected to  it at its side.  An unknown  liquid  reaches level  A in the  container  and level B  in the tube— level A  being    higher than  level B. The  liquid  supports a  20.0 cm high  column of  oil, between  levels B and  C, whose  density is    In the figure,  the gauge  pressure at  level B is  closest to: 
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3)  _______  A)  6 3 Pa  7 90 Pa 
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470 Pa  D) 
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310 Pa  E) 
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940 Pa    4) 
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A football  coach in  hopes of  improving  his kicker's  performance  fills a    football with  helium  rather than  air.  Assuming  that the  football  contains a  volume of  helium equal  to the air it  replaces at  standard  temperature  and  pressure,  what change  in relative  weight of the  football  (change in  weight  divided by  weight) is to  be expected?  The volume  of the  football is  1.6 l. 
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4)  _______  A) 
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1.96  ×  10 -
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B)  1.81  × 1
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1.42  ×  10 -
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D)  1.01  × 1   5
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A pump uses  a piston of  15 cm  diameter  which  moves    What is the  fluid  velocity of a  tube    in diameter? 
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5)  _______  A) 
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