Calculating Gauge Pressure in a Closed Tube

In summary, the container filled with oil is open to the atmosphere and has a point A that is 50cm high and 50cm from the top. To find the gauge pressure at point A, you can use the equation po+(density)gd, where po is the atmospheric pressure, density is the density of the oil, g is the gravitational constant, and d is the height of point A. By plugging in the values, we can solve for the gauge pressure at point A to be 4,400Pa. The density of the oil is also given to be 900kg/m3.
  • #1
Beastegargoyl
9
0

Homework Statement


The container shown in the figure is filled with oil. It is open to the atmosphere on the left.
What is the gauge pressure at point A? Point A is 50cm high from the ground and 50 cm from the top.

Homework Equations


po+(density)gd



The Attempt at a Solution


I took 1 atompshere in Pa of 1.013*105+900*G which is 9.8*.5m and I came up with an answer of 1.057 then I subtracted the gauge pressure of 101.3 kPa and solved for the final answer to be 4,400Pa.

Does anyone come up with the same answer?
 
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  • #2
What's the density of the oil? Gauge pressure is just (density)gh, so you don't have to calculate total pressure and then subtract atmospheric pressure.
 
  • #3
The denisty of oil is 900kg/m3
 

1. What is pressure in a closed tube?

Pressure in a closed tube refers to the amount of force exerted by a gas or liquid inside the tube on its walls. It is typically measured in units of pressure, such as pounds per square inch (psi) or pascals (Pa).

2. How is pressure in a closed tube calculated?

The pressure in a closed tube is calculated by dividing the force exerted on the walls of the tube by the area of the walls. This can be represented by the equation P = F/A, where P is pressure, F is force, and A is area.

3. What factors affect pressure in a closed tube?

The pressure in a closed tube is affected by several factors, including the volume of gas or liquid inside the tube, the temperature of the substance, and the type of substance. These factors can impact the force and/or the area, which in turn affects the pressure.

4. How does pressure change in a closed tube when the volume is decreased?

When the volume of gas or liquid inside a closed tube is decreased, the pressure will increase. This is because the same amount of substance is now occupying a smaller space, resulting in a higher force per unit area.

5. Why does pressure decrease in a closed tube when the temperature is increased?

When the temperature of a gas or liquid inside a closed tube is increased, the pressure will decrease. This is due to the molecules of the substance gaining more energy and moving faster, resulting in a larger area of impact on the walls of the tube and a lower force per unit area.

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