# physics

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 cross-sectional area of the tank is needed.

1. 👍
2. 👎
3. 👁
1. rho g h = 1000 (9.81)(30) = 2.94*10^5
and get total of 3.9 * 10^5

1. 👍
2. 👎
2. Thank you boss!

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

1. 👍
2. 👎
4. Because the air we live in also has pressure
no pressure change in a horizontal hose with no flow through it.

1. 👍
2. 👎

## Similar Questions

1. ### Math

A rectangular tank 40cm wide by 50 cm long by 30 cm high is filled up with water up to 2/3 of its height .water flows from a tap into the tank at a rate of 0.5 liter per minute. Find the amount of water in the tank after 30

2. ### Calculus

A tank of water in the shape of a cone is being filled with water at a rate of 12 m^3/sec. The base radius of the tank is 26 meters and the height of the tank is 8 meters At what rate is the depth of the water in the tank changing

3. ### physics

A large tank is filled with water to a depth of d = 18 m. A spout located h = 13 m above the bottom of the tank is then opened as shown in the drawing. With what speed will water emerge from the spout?

4. ### CALCULUS

Water is draining from a small cylindrical tank into a larger one below it. The small cylindrical tank has a radius of 4 feet and a height of 6 feet; the large cylindrical tank has a radius of 8 feet and a height of 16 feet. The

1. ### physics

A large open tank is filled with water to a depth of 15 m. A spout located 10.0 m above the bottom of the tank is then opened as shown in the drawing. What is the volume flow rate from the spout? Assume that the radius of the

2. ### 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? How many more gallons of water will

3. ### maths

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in

4. ### algebra

Joe's larger tank is completely filled with water. He takes water from it to completely fill the small tank. Determine how many cubic inches of water will remain in the larger tank The larger tank is 12 x 30 x 16 and the smaller

1. ### math

An inverted square pyramid has a height equal to 8m and a top edge to 3m. Initially, it contains water to the depth of 5m. a. What is the initial volume of the water in the tank? b. If the additional water is to be pumped into the

2. ### Maths

A rectangular water tank is being filled at a constant rate of 101t/s.The base of the tank has width,w=10m and length,l=15m. If the volume of the tank is given by v=w*l*h where h represents the height of the tank,what is the rate

3. ### Math

A school water tank is in the shape of a frustum of a cone. The height of the tank is 7.2 m and the top and bottom radii are 6m and 12 m respectively. (a) Calculate the area of the curved surface of the tank, correct to 2 decimal

4. ### maths

a rectangular tank 30cm×20cm×12cm contains water to a depth of 6 cm.A metal cube of side 10 cm is placed in the tank with one face resting on the bottom of the tank.find the volume of the water in the litre must be poured in the