Posted by Sean on Friday, April 13, 2012 at 11:41am.
2. A pool has an area A = 50 m2 and depth h = 2.5 m. The pool is filled with water to the maximum height. An electrical pump is used to empty the pool. There are two pipes coming out the pump: one is submerged into water has a radius r1 = 4 cm the other has a radius r2 = 2.5 cm. Answer the following questions ignoring friction, viscosity, turbulence.
Calculate the net force on the bottom of the pool.
Calculate work done by the pump required to empty the pool in 5 h.
Calculate the speed of the water flow in the submerged pipe.

Physics  Henry, Saturday, April 14, 2012 at 10:48pm
a. V=A*h = 50*2.5=125 m^3=1.25*10^8 cm^3.
Dw = 1g/cm^3 = 0.001kg/cm^3 = Density of water.
Mass=1.25*10^8cm^30.001kg/cm^3
= 1.25*10^5 kg = Mass of the water.
F=mg = 1.25*10^5kg * 9.8N/kg = 1.225*10^6 N. = Force on bottom.
b. Work = F*d = 1.225*10^6 * 2.5 = =
3.0625*10^6 Joules.

Physics  John, Wednesday, March 26, 2014 at 8:01pm
a.)
P=P initial + pgh
101,000 Pa + (1000)(9.8)(2.5)
P=125500Pa.
P=F/A
125500=F/50
6.3*10^6N
Answer This Question
Related Questions
 math  A sludge pool is filled by two inlet pipes. One pipe can fill the pool in...
 college algebra  Pump A alone can empty the city pool in 12 hours. If only pump...
 math  One pump can empty a pool in 5 days, whereas a second pump can empty the ...
 math  One pump can empty a pool in 5 days, whereas a second pump can empty the ...
 mathalgebra  one pump can empty a pool in 5 days, wheras a second pump can ...
 math  A pool of water with surface area of 0.6 hectares has a uniform depth of ...
 Calc  An Olympicsized swimming pool is a rectangular prism that is 50m long, ...
 Math  Each of three pumps A, B, C can pump water either into, or out of, a ...
 physics  a homeowner wishes to drain her swimming pool by siphoning the water, ...
 algebra  Pump A can fill a swimming pool in 6 hours and pump B can fill the ...
More Related Questions