Water Density & Altitude

by yenting
Tags: altitude, density, water
yenting is offline
Sep15-11, 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 :


=4.015*10^3lbf (sea level)

=4.011*10^3lbf (Colorado)

is that correct???
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
apelling is offline
Sep15-11, 02:56 AM
P: 70
Yes it is.
SteamKing is offline
Sep15-11, 08:49 AM
HW Helper
P: 5,582
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.

apelling is offline
Sep15-11, 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