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Water Density & Altitude 
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#1
Sep1511, 02:14 AM

P: 1

water has a density of 62.4lbm/ft^3 .How much does 2ft^3 of water weight at sea level and in Colorado where the altitude is 5374ft and the gravitational acceleration is 32.139ft/s^2?
Solution : density=mass/volume 62.4lbm/ft^3=mass/2ft^3 mass=124.8lbm w=mg =124.8lbm*32.174ft/s^2 =4.015*10^3lbf (sea level) w=mg =124.8lbm*32.139ft/s^2 =4.011*10^3lbf (Colorado) is that correct??? 


#2
Sep1511, 02:56 AM

P: 70

Yes it is.



#3
Sep1511, 08:49 AM

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Sorry, you are both wrong. According to your calculation, yenting, one cubic foot of water weighs about two tons.
One lbm is equivalent to about 0.454 kg. One lbm also has a weight of one pound force when g = 32.174 ft/s^2. 


#4
Sep1511, 10:28 AM

P: 70

Water Density & Altitude
Thanks for checking SteamKing.
I'll stick to metric, it's so much easier. So its the ratio 32.139:32.174 that gives the value of g. That makes much more sense. 


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