Consider a hemispherical tank that is completely filled with water. The water exits the tank from the spout as shown. L If R = 9 m, and L = 2 m, calculate the work in megajoules (1 MJ = 1 x 106 J) required to pump all water out of the tank. The density of water is 1000 kg/m³, and g = 9.8 m/s². (Use decimal notation. Give your answer to three decimal places.)

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### Hemispherical Tank Water Pumping Problem

Consider a hemispherical tank that is completely filled with water. The water exits the tank from the spout as shown in the diagram.

<img src="hemispherical_tank.png" alt="Hemispherical Tank Diagram" width="300"/>

**Diagram Explanation:**
- The tank is represented as a half-sphere (hemisphere) with a radius \( R \).
- The spout extends vertically from the top of the tank, with a length \( L \).

Given:
- Radius \( R = 9 \) meters
- Length of the spout \( L = 2 \) meters
- Density of water \( \rho = 1000 \, \text{kg/m}^3 \)
- Acceleration due to gravity \( g = 9.8 \, \text{m/s}^2 \)
- Work required calculation in megajoules (1 MJ = \( 1 \times 10^6 \) J)

**Problem Statement:**

Calculate the work in megajoules required to pump all water out of the tank. Use decimal notation and provide the answer to three decimal places.

**Solution Approach:**

To solve this problem, follow these steps:
1. Determine the volume of the hemispherical tank.
2. Calculate the total mass of water in the tank.
3. Integrate the force required to lift each differential volume element of water out of the tank to the height of the spout.
4. Convert the total work from joules to megajoules.

**Formulas Needed:**

1. Volume of a hemisphere: 
\[ V = \frac{2}{3} \pi R^3 \]

2. Mass of water:
\[ m = \rho \cdot V \]

3. Work required to lift a differential volume \( dV \) to height \( h \):
\[ dW = \rho g h \, dV \]

4. Total work (W) required:
\[ W = \int_0^R  \rho g h \, dV(h) \]
Where:
\[ dV = \pi (R^2 - h^2) \, dh \]
\[ h \text{ is the height from the bottom of the tank up to level } x. \]

Details of the exact integration process and calculations can be included in the educational material to guide students through the process
Transcribed Image Text:### Hemispherical Tank Water Pumping Problem Consider a hemispherical tank that is completely filled with water. The water exits the tank from the spout as shown in the diagram. <img src="hemispherical_tank.png" alt="Hemispherical Tank Diagram" width="300"/> **Diagram Explanation:** - The tank is represented as a half-sphere (hemisphere) with a radius \( R \). - The spout extends vertically from the top of the tank, with a length \( L \). Given: - Radius \( R = 9 \) meters - Length of the spout \( L = 2 \) meters - Density of water \( \rho = 1000 \, \text{kg/m}^3 \) - Acceleration due to gravity \( g = 9.8 \, \text{m/s}^2 \) - Work required calculation in megajoules (1 MJ = \( 1 \times 10^6 \) J) **Problem Statement:** Calculate the work in megajoules required to pump all water out of the tank. Use decimal notation and provide the answer to three decimal places. **Solution Approach:** To solve this problem, follow these steps: 1. Determine the volume of the hemispherical tank. 2. Calculate the total mass of water in the tank. 3. Integrate the force required to lift each differential volume element of water out of the tank to the height of the spout. 4. Convert the total work from joules to megajoules. **Formulas Needed:** 1. Volume of a hemisphere: \[ V = \frac{2}{3} \pi R^3 \] 2. Mass of water: \[ m = \rho \cdot V \] 3. Work required to lift a differential volume \( dV \) to height \( h \): \[ dW = \rho g h \, dV \] 4. Total work (W) required: \[ W = \int_0^R \rho g h \, dV(h) \] Where: \[ dV = \pi (R^2 - h^2) \, dh \] \[ h \text{ is the height from the bottom of the tank up to level } x. \] Details of the exact integration process and calculations can be included in the educational material to guide students through the process
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