Mercury barometer reading

  • Thread starter tweety1234
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  • #1
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Homework Statement



a)
A scientist carries a thermometer, barometer, pan and gas camping stove up a mountain. At a certain point he collects water from a stream, boils it and measures the temperature of the steam condensing on the thermometer to be 98°C. What is the height of the column of mercury [itex] (density = 13560 kg m^{-3} ) [/itex] in the barometer?

b) Estimate the altitude of the scientist relative to sea level, assuming the density of air to be [itex] 1.186 kg m^{-3} [/itex] .
I am no sure how to do this question? Do I have to use steam tables?
 

Answers and Replies

  • #2
Borek
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That's one of the ways of dealing with the problem.
 
  • #3
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That's one of the ways of dealing with the problem.
okay, how would I go about finding the height of the barometer? do I use this equation [tex] \bigtriangleup p = \rho g \bigtriangleup h [/tex] ?
 
  • #4
Borek
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No need for deltas, p=dgh correctly describes pressure at the bottom of the column of a liquid.
 
  • #5
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No need for deltas, p=dgh correctly describes pressure at the bottom of the column of a liquid.
Okay thanks,

So do I just get the pressure of steam at that temperature 98C, and than rearrange the equation to find h ?

Is this the correct method to work out the height of the barometer?
 
  • #6
Borek
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Looks like.
 

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