Estimate the time required to fill with water a cone shaped container (see the figure below) 4 ft high and 4 ft across at the top if the filling rate is 21 gal/min. 4ft 4ft

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Please answer these 2 questions. Only final answer needed. Please fast.
### Problem Statement

**Scenario:**

Air at standard conditions enters the compressor shown in the figure below at a rate of 10 ft³/s. It leaves the tank through a 1.2-in.-diameter pipe with a density of 0.0035 slugs/ft³ and a uniform speed of 697 ft/s.

**Tasks:**

(a) Determine the rate (slugs/s) at which the mass of air in the tank is increasing or decreasing.

(b) Determine the average time rate of change of air density within the tank.

**Figure Description:**

The figure illustrates a tank with a volume of 20 ft³. Air entering the tank through a compressor has a volume flow rate of 10 ft³/s and a density of 0.00238 slugs/ft³. Air exits the tank through a pipe with a diameter of 1.2 inches at a velocity of 697 ft/s and a density of 0.0035 slugs/ft³.

**Formulas:**

(a) \(\frac{DM}{Dt}\) =  
slugs/s

(b) \(\frac{D \rho}{Dt}\) =  
slugs/ft³·s
Transcribed Image Text:### Problem Statement **Scenario:** Air at standard conditions enters the compressor shown in the figure below at a rate of 10 ft³/s. It leaves the tank through a 1.2-in.-diameter pipe with a density of 0.0035 slugs/ft³ and a uniform speed of 697 ft/s. **Tasks:** (a) Determine the rate (slugs/s) at which the mass of air in the tank is increasing or decreasing. (b) Determine the average time rate of change of air density within the tank. **Figure Description:** The figure illustrates a tank with a volume of 20 ft³. Air entering the tank through a compressor has a volume flow rate of 10 ft³/s and a density of 0.00238 slugs/ft³. Air exits the tank through a pipe with a diameter of 1.2 inches at a velocity of 697 ft/s and a density of 0.0035 slugs/ft³. **Formulas:** (a) \(\frac{DM}{Dt}\) = slugs/s (b) \(\frac{D \rho}{Dt}\) = slugs/ft³·s
### Estimating Time to Fill a Cone-Shaped Container

**Problem Statement:**
Estimate the time required to fill with water a cone-shaped container (see the figure below) 4 ft high and 4 ft across at the top if the filling rate is 21 gal/min.

**Diagram Explanation:**
The provided diagram depicts a cone-shaped container being filled with water. The cone has a height and a top diameter of 4 feet each. Water is being poured into the cone through a tube.

**Given Data:**
- Height of the cone (h) = 4 ft
- Diameter of the top of the cone = 4 ft (Radius (r) of the cone = 2 ft)
- Filling rate = 21 gallons per minute

**Calculation:**
To determine the time required to fill the cone, we should first calculate the volume of the cone.

The volume (V) of a cone is given by the formula:
\[ V = \frac{1}{3}\pi r^2 h \]

Substituting the given values:
\[ r = 2 \text{ ft} \]
\[ h = 4 \text{ ft} \]

\[ V = \frac{1}{3} \pi (2)^2 (4) \]
\[ V = \frac{1}{3} \pi (4)(4) \]
\[ V = \frac{1}{3} \pi (16) \]
\[ V = \frac{16}{3} \pi \text{ cubic feet} \]

To convert the volume from cubic feet to gallons we use the conversion factor:
1 cubic foot = 7.48 gallons

\[ V = \frac{16}{3} \pi \times 7.48 \text{ gallons} \]
\[ V \approx 125.6 \text{ gallons} \]

Now, to find the time (t) to fill this volume at the rate of 21 gallons per minute:
\[ t = \frac{\text{Total Volume}}{\text{Filling Rate}} \]
\[ t = \frac{125.6 \text{ gallons}}{21 \text{ gallons per minute}} \]
\[ t \approx 5.98 \text{ minutes} \]

So, the estimated time to fill the cone-shaped container is approximately 6 minutes.

**Input Area:**
```
t = [ ] min
```

This setup
Transcribed Image Text:### Estimating Time to Fill a Cone-Shaped Container **Problem Statement:** Estimate the time required to fill with water a cone-shaped container (see the figure below) 4 ft high and 4 ft across at the top if the filling rate is 21 gal/min. **Diagram Explanation:** The provided diagram depicts a cone-shaped container being filled with water. The cone has a height and a top diameter of 4 feet each. Water is being poured into the cone through a tube. **Given Data:** - Height of the cone (h) = 4 ft - Diameter of the top of the cone = 4 ft (Radius (r) of the cone = 2 ft) - Filling rate = 21 gallons per minute **Calculation:** To determine the time required to fill the cone, we should first calculate the volume of the cone. The volume (V) of a cone is given by the formula: \[ V = \frac{1}{3}\pi r^2 h \] Substituting the given values: \[ r = 2 \text{ ft} \] \[ h = 4 \text{ ft} \] \[ V = \frac{1}{3} \pi (2)^2 (4) \] \[ V = \frac{1}{3} \pi (4)(4) \] \[ V = \frac{1}{3} \pi (16) \] \[ V = \frac{16}{3} \pi \text{ cubic feet} \] To convert the volume from cubic feet to gallons we use the conversion factor: 1 cubic foot = 7.48 gallons \[ V = \frac{16}{3} \pi \times 7.48 \text{ gallons} \] \[ V \approx 125.6 \text{ gallons} \] Now, to find the time (t) to fill this volume at the rate of 21 gallons per minute: \[ t = \frac{\text{Total Volume}}{\text{Filling Rate}} \] \[ t = \frac{125.6 \text{ gallons}}{21 \text{ gallons per minute}} \] \[ t \approx 5.98 \text{ minutes} \] So, the estimated time to fill the cone-shaped container is approximately 6 minutes. **Input Area:** ``` t = [ ] min ``` This setup
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