Register to reply 
Water Density & Altitude 
Share this thread: 
#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

Emeritus
Sci Advisor
HW Helper
Thanks
PF Gold
P: 6,334

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. 


Register to reply 
Related Discussions  
Pressure to Force to Mass with English units  Introductory Physics Homework  2  
English Units Are Goofy  General Discussion  59  
Lose weight (mass) or train?  effect of losing weight (mass) on power  Introductory Physics Homework  1  
English System Units and R value  Introductory Physics Homework  4  
English vs. SI units of mass and weight  General Physics  2 