physics
posted by Georgey .
A water tank is filled to a depth of 10 m and the tank is 20 m above ground. The water
pressure at ground level in a hose 2 cm in diameter is closest to:
A) 3.9 × 105 N/m2
B) 2.0 × 104 N/m2
C) 9.2 N/m2
D) The crosssectional area of the tank is needed.

rho g h = 1000 (9.81)(30) = 2.94*10^5
add 1 atm = 1*10^5
and get total of 3.9 * 10^5 
Thank you boss!

Why do you need to add the 1 atm? And the 2 cm in this question does not matter?

Because the air we live in also has pressure
no pressure change in a horizontal hose with no flow through it.
Respond to this Question
Similar Questions

math
A conical tank sits point down, at ground level, so that the circular top of the tank is parallel to the ground. The tank is 5.0 meters tall, and the top of the tank has a diameter of 3.0 meters. The tank is half full of water. What … 
math
A cylindrical tank is lying horizontally on the ground, its diameter is 16 feet, its length is 25 feet, the depth of the water in the tank is 5 feet. How many gallons of water are in the tank? 
Physics
A./_\ B.\_/ C._ The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select TTrue, … 
Re post water in tanks problem
A./_\ B.\_/ C._ The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select TTrue, … 
physics
A large water tank is 18m above the ground. Suppose a pipe with a diameter of 8cm is connected to the tank and leads down to the ground. How fast does the water rush of the piper at ground level? 
physics
A pressurized tank of water has a 10cm diameter orifice at the bottom, where water discharges to the atmosphere. the water level is 3 m above the outlet. the tank air pressure above the water level is 300 kpa (absolute)while the atmospheric … 
Physics
A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A waterfilled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The … 
Physics II
A large cylindrical water tank 11.5 m in diameter and 13.5 m tall is supported 8.75 m above the ground by a stand. The water level in the tank is 10.6 m deep. The density of the water in the tank is 1.00 g/cm3. A very small hole is … 
Science
A tank which is raised above the ground level, has a hole in its flat base, through which water flows and falls to the ground below. If the depth of water in the tank is 0.5 m and the tank base is 0.7 m above the ground, what is the … 
Physics
Water flows from a fire truck through a hose that is 11.7 cm in diameter and has a nozzle that is 2.0 cm in diameter. The firemen stand on a hill 5.0 m above the level of the truck. When the water leaves the nozzle, it has a speed …