logistic_guy
Full Member
- Joined
- Apr 17, 2024
- Messages
- 462
here is the question
The water at \(\displaystyle 20^{\circ}C\) in a \(\displaystyle 10\)-m-diameter, \(\displaystyle 2\)-m-high aboveground swimming pool is to be emptied by unplugging a \(\displaystyle 5\)-cm-diameter, \(\displaystyle 25\)-m-long horizontal plastic pipe attached to the bottom of the pool. Determine the initial rate of discharge of water through the pipe and the time (hours) it would take to empty the swimming pool completely assuming the entrance to the pipe is well-rounded with negligible loss. Take the friction factor of the pipe to be \(\displaystyle 0.022\). Using the initial discharge velocity, check if this is a reasonable value for the friction factor.
my attemb
i think this question can be solved by Bernoulli equation
the density of water isn't given and i can't assume it's \(\displaystyle 1000\) because there's temperature involve over there
what should i do in this case?
The water at \(\displaystyle 20^{\circ}C\) in a \(\displaystyle 10\)-m-diameter, \(\displaystyle 2\)-m-high aboveground swimming pool is to be emptied by unplugging a \(\displaystyle 5\)-cm-diameter, \(\displaystyle 25\)-m-long horizontal plastic pipe attached to the bottom of the pool. Determine the initial rate of discharge of water through the pipe and the time (hours) it would take to empty the swimming pool completely assuming the entrance to the pipe is well-rounded with negligible loss. Take the friction factor of the pipe to be \(\displaystyle 0.022\). Using the initial discharge velocity, check if this is a reasonable value for the friction factor.
my attemb
i think this question can be solved by Bernoulli equation
the density of water isn't given and i can't assume it's \(\displaystyle 1000\) because there's temperature involve over there
what should i do in this case?