1.A new machine will cost $25,000. The machine is expected to last 4 years and have no salvage value. If the interest rate is 12%, determine the return and the risk associated with the purchase. The estimated annual savings and its probability is $7000 at 30%, $8500 at 40%, and $9500 at 30%. Return? Risk?

2.A 12 in diameter pipe, 9200 f t long (f = 0.024) discharges freely into the air at an elevation 18 f t below the surface of the water at intake. It is necessary to double the flow by inserting a pump at upstream end of pipe, If the efficiency of the pump is 73%, how much power will be required ?

3.The uniform 4 meter boom has a mass of 60 kg and is pivoted to the back of the truck at A and secured by a cable at C. Calculate the magnitude of the total force supported by the connection at A if the truck starts from rest with an acceleration of 5 m/s^2. Answer is A=1192 N Distance from A to B=4 m at 120 degree angle relative to the line AC Distance from A to C= 2m

What range of reactor volumes is necessary to achieve : To achive a specific level of disinfection a water treatment plant operator determines the" Ct" value 180mg min/l is necessary with units for disinfectant concentration C in mg/l and disinfectant contact time t in minutes |

The normal and shear stresses on a plane inclined : A cylindrical specimen of soil is compressed by an axial principal stress of 500 kPa and a radial principal stress of 200 kPa. Plot Mohr's circle of stress and determine (a) the maximum shear stress and |

Determine flow rate into or out of each reservoir : Three reservoirs are connected by three pipes as shown in Figure 1 with hA = 100 ft, hB = 20 ft, hC = 0 ft, l1 = 1000 ft, l2 = 500 ft, l3 = 400 ft and D1 = D2 = D3 = 1 ft. Determine flow rate into or out of each reservoir if friction in each pipe is .. |

What is the minimum time it will take for all the taxol to : The molecular diffusion coefficient of taxol in fluid blood is Dab=1.0*10^-6 cm2/s. A) what is the convective mass transfer coefficient, kc around the outer surface of the cylindrical portion of the stent, for the solute Taxol?. B) what is the minimu.. |

How much power will be required : A 12 in diameter pipe, 9200 f t long (f = 0.024) discharges freely into the air at an elevation 18 f t below the surface of the water at intake. It is necessary to double the flow by inserting a pump at upstream end of pipe, If the efficiency of the .. |

Does this construction method have any play in the construct : Battered piles are used on many construction projects as a permanent part of the element being constructed. Does this construction method have any play in the construction of a temporary earth retention system? |

What would the fractional removal of : What is the settling velocity of a floc of diameter 0.15 mm and density 2.12 g/cm3 in water? 2- Will the floc from problem 4 be completely removed in a typical sedimentation basin if alum was used as the coagulant? |

What would be the vertical load on the sample : A core sample of basalt, 4 inches long and 2 inches in diameter, was tested in unconfined compression. The basalt is known to have a modulus of elasticity = 9.1 x 106 psi. |

Explain the preparation of triethanolamine buffer : Describe the preparation of 250 mL of 0.6 M triethanolamine buffer, pH 7.2, from the free amine and 1.0 M HCl (pK for the amine hydrochloride is 7.80). |

## A model rocket is launched straight upward its altitude ya model rocket is launched straight upward. its altitude y as a function of time is given by y bt -ct2 where b 82 ms |

## What is the distance corrected for the erroneous tapelengthA 100 ft steel tape known to be only 99.97ft long (understandard conditions) was used to record a measurem,ent of 215.63ft. What is the distance corrected for the erroneous tapelength |

## Compute gravitational force and force of mutual attraction ftwo steel spheres 100mm in diameter. Compute gravitational force and the force of mutual attraction F in newtons. the specific weight of steel is 0.284 lb/in^3 |

## Imaging you have to shoot a basketball ballPart B (Assignment): by trial and error, find the angle that will give the minimum force F to make a basket (hint: try 52 degrees)The trajectory of the ball will make a basket when x = L and y = Hb |

## You are working as a project analyst for the local gasyou are working as a project analyst for the local gas utility and you have been placed on a project to install an |

## How many pounds of concrete must be attached to beamHow many pounds of concrete (γ=150 lb/ft3) must be attached to a beam having a volume of 4.0 ft3(s.g.=0.65) to cause both to sink? |

## Determine the work done and the heat transferWater, initially dry saturated vapour at 4 bar, lls a closed rigid con- tainer. The water is heated until its temperature is 400C. Determine the work done and the heat transfer. |

## What is the main objective of nasas mars science laboratoryQ. What is the main objective of NASA's Mars Science Laboratory (MSL) mission? When was it launched and when and where is it scheduled to land on Mars? Explain the major differences between this mission and Mars Exploration Rovers (MER) mission? |

## Determine the critical pointThe initial ultimate BOD after mixing of the Bergelmir Riveris 12.0 mg/L. The DO in the Bergelmir River after the wastewaterand river have mixed is at saturation. The river temperature is 10degrees celsius |

## Compute at midepth of the silty clay the total verticalA soil profile consists of 3 m of clean sand (?= 19 kN/m3) over 6 m of marine clay (?= 16 kN/m3, kv = 10-9 m/s) over 3 m of silty clay (?= 17 kN/m3, kv = 2 X10-9 m/s). |

## Determine how man n of water must be added to the sampleA moist soil sample weighing 22.2 N has a moisture content of 20%. How man N of water must be added to the sample to increase the moisture content to 30% |

## What force-acting on the top edge to hold the gate shutA 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut |

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