Chapter 8, Problem 8.7.2P

For the shown figure: determine the hB and the vertical velocity? 2 cm 25 cm B 5 cm C Ground surface hB Water table Piezometric surface Unconfined aquifer (K= 10 m/day) Aquitard (K=0.2 m/day) Leaky aquifer

A leaky confined aquifer is overlain with unconfined aquifer. The estimated recharge rate from the aquifer is 0.085 m/year), the average head in the aquifer is (6.8 m) and the thickness of the aquifer is (4.3 m).calculate the vertical hydraulic conductivity of the aquifer.

A company invested an amount of $85,000 to implement a project, and the expected receipts from this project during the 5 years were as follows: End the year 1 $10,000 | (العائدات) Receipts | 2 $25,000 3 $35,000 $45,000 5 $30,000 Find I.R.R. and determine if the project is desirable or not If the MARR was 16%? Q: An investor bought a factory for an amount of $10 million, the estimated useful life is 40 years and the estimated salvage value is $1 million, the factory's annual revenues are $500,000. Use the Sum years' digits method and Straight line method to find: a) Annual depreciation charge at the end of the 25th year b) Total depreciation charge at the end of the 25th year c) Book value at the end of the 25th year

The jet plane is flying upward such that its wings make an angle of attack of 15° with the horizontal. The plane is traveling at V = 750 m/s, in air having a temperature of 8°C and absolute pressure of 95 kPa. The leading edge of the wing has an angle of 8°. (Figure 1) Figure 4° 15° 1 of 1 ་ Determine the pressure of the air just in front or to the right of the expansion waves. Express your answer to three significant figures and include the appropriate units. ☐ μι ? p = 50.6 kPa Submit Previous Answers Request Answer × Incorrect; Try Again; 3 attempts remaining Part B Determine the temperature of the air just in front or to the right of the expansion waves. Express your answer using three significant figures. T = 229 K Submit Previous Answers Correct

Please show all work, including; Ma? Ay? V at A,B,C. Shear diagram, M/EI diagram, tB/C, tC/A deflection curve and thetaC? Etc...   7-31. Use the moment area method and determine the slope at C and the displacement at B. EI is constant. Structural Analysis 10 edition

Air at a temperature of 25° C and standard atmospheric pressure of 101.3 kPa flows through the nozzle into the pipe where the absolute internal pressure is 90 kPa. The nozzle has a throat diameter of d = 25 mm. Gas constant for air is R = 286.9 J/[kg K] and its specific heat ratio is k = 1.40. (Figure 1) Part A Determine the mass flow into the pipe. Express your answer using three significant figures. Figure 1 of 1 VO ΜΕ ΑΣΦ vec m = 0.0482 Submit Previous Answers Request Answer × Incorrect; Try Again; 2 attempts remaining Provide Feedback wwwww ? kg/s

Outside air at a temperature of 25° C is drawn into the duct and then heated along the duct at 149 kJ/kg. At section 1 the temperature is T = 15° C and the absolute pressure is 98 kPa. Neglect friction. (Figure 1) Part B Figure 50 mm -2 m Correct Correct answer is shown. Your answer 0.6142 was either rounded differently or used a different number of significant figures than required for this part. Determine the temperature at section 2. Express your answer using three significant figures. 跖 ΑΣΦ vec 1 of 1 T₂ = Submit Request Answer ་ Part C ? K Determine the pressure at section 2. Express your answer to three significant figures and include the appropriate units. μÅ ?

The jet is flying at M = 1.3, where the absolute air pressure is 25 kPa. A shock is formed at the inlet of the engine. Assume isentropic flow within the engine. k = = 1.40 for air. (Figure 1) Figure 0.4 m 0.6 m M = 1.3 1 of 1 Po = 67.8 kPa Submit Previous Answers ་ Part C Correct What is the pressure in this region? Express your answer to three significant figures and include the appropriate units. µÅ p= 42.8 kPa Submit Previous Answers Request Answer ? × Incorrect; Try Again; 3 attempts remaining Provide Feedback

Q5 A piece of sandstone with a bulk volume of 1.3 cc is contained in a 5-cc cell filled with helium at 760 mm Hg. Temperature is maintained constant and the cell is opened to another evacuated cell the same volume. The final pressure in the two vessels is 334.7 mm Hg. What is the porosity of the sandstone?