1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Fluid Statics

  1. Apr 18, 2017 #1
    1. The problem statement, all variables and given/known data
    (a) A rectangular gasoline tank can hold 39.0 kg of gasoline when full. What is the depth of the tank if it is 0.450 m wide by 0.900 m long?
    m
    (b) What is the volume of the tank? (It is suitable for a passenger car.)
    gal
    2. Relevant equations
    Density of gas=719.7=mass/volume
    Volume=lengthxwidthxheight
    density=mass/volume
    density=mass/ (lengthxwidthxheight)
    3. The attempt at a solution
    I assumed depth was referring to the height, which might be what I'm doing wrong.
    719.7=39/ (.45 x .9 x h)
    height=.1338m
    And then I would convert the volume (.45 x .9m x .1338m) to gallons using (1 gal=.003785 m3)

    This seems fairly straight forward, but for some reason this answer is wrong. Please help!
    Thanks
     
  2. jcsd
  3. Apr 18, 2017 #2

    TSny

    User Avatar
    Homework Helper
    Gold Member

    You work looks correct to me. What did you get for the number of gallons?
     
  4. Apr 18, 2017 #3
    The depth of .1338m was incorrect, so I knew the volume would be and didn't do the calculation. I've checked my math, and I still get .1338m
     
  5. Apr 18, 2017 #4

    TSny

    User Avatar
    Homework Helper
    Gold Member

    The density of gasoline can vary. Were you given a particular value for the density?
     
  6. Apr 18, 2017 #5
    No, no value was given. I googled this value.
     
  7. Apr 18, 2017 #6

    TSny

    User Avatar
    Homework Helper
    Gold Member

    Are you using a textbook that has a table of densities?
     
  8. Apr 18, 2017 #7
    No, I just searched through the textbook and I do not see table of densities.
     
  9. Apr 18, 2017 #8

    TSny

    User Avatar
    Homework Helper
    Gold Member

    OK. Although Wikipedia gives 719.7 kg/m3, they also state, "Finished marketable gasoline is traded with a standard reference of 0.755 kg/L", which is 755 kg/m3. Several other sites give values between 730 and 750 kg/m3. So, it's hard to say what value you should use.
     
  10. Apr 18, 2017 #9
    Thank you-I am going to clarify with professor
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Fluid Statics
  1. Fluid Statics (Replies: 3)

  2. Fluid statics (Replies: 1)

  3. Fluid statics (Replies: 8)

  4. Fluid Statics (Replies: 2)

  5. Static Fluid (Replies: 4)

Loading...