1. Prob 9-28 Solution Tutorial
Engineering 25
Prob 9-28 Solution Tutorial
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer

2. Prob 9-28 Ref Example 9.3-3

3. Prob 9-28

4. Prob 9-28

5. Prob 9-28

6. Prob 9-28

7. The MATLAB Code
Find tdrain,max = 25250

8. The MATLAB Code
Find tdrain,max = 25250

9. The SphereTank Function
The MATLAB Code
Find tdrain,max = 25250
The SphereTank Function

10. h(t) Result
Slope looks about Constant over about 5-20 kSec

11. dh/dt by Central Diff
h = 2.5 ft at about 12 kSec
Slope are quite close to those Calculated on Paper
Slope near t = 0 is about -3.9
Slope near h = 2.5’ is about -1.6