Civil Engineering

A person is sailing in a boat moving east with a speed of 15 ft/s. At the instant that the boat passes in front of a pier, a person located there throws a stone towards the North. The rock hits the water 6sm later, 150ft from the pier. Find the coordinates of the point of impact of the stone with the water, measured by the person in the boat.

Topic : Galilean transformations A person is sailing in a boat moving east with a speed of 15 ft/s. At the instant that the boat passes in front of a pier, a person located there throws a stone towards the North. The rock hits the water 6sm later, 150ft from the pier. Find the coordinates …

A person is sailing in a boat moving east with a speed of 15 ft/s. At the instant that the boat passes in front of a pier, a person located there throws a stone towards the North. The rock hits the water 6sm later, 150ft from the pier. Find the coordinates of the point of impact of the stone with the water, measured by the person in the boat. Read More »

Problems 5.4-5.8 relate to Product Development 5.4 Construct a house of quality matrix for a wrist- watch. Be sure to indicate specific customer wants that you think the general public desires. Then complete the matrix to show how an operations manager might identify specific attributes that can be measured and controlled to meet those customer desires. +

EXPERT ANSWER An operations manager can try to meet the customer desires by incorporating the following features as shown in the house of quality matrix. The “relationship legend” is shown in the top left hand corner. The matrix also shows the interrelationships between the “hows ” on the roof of the house. Sturdiness of design …

Problems 5.4-5.8 relate to Product Development 5.4 Construct a house of quality matrix for a wrist- watch. Be sure to indicate specific customer wants that you think the general public desires. Then complete the matrix to show how an operations manager might identify specific attributes that can be measured and controlled to meet those customer desires. + Read More »

1. Cloning Problem (30 pts). You desire to stabilize a segregationally-unstable plasmid (the E. coli host tends to spit the whole plasmid out periodically with the loss of the recombinant gene) by adding a locus that has been found to stabilize plasmids by killing plasmid-free daughter cells as they arise (parB, also known as hok/sok). The new plasmid will consist of the unstable plasmid pMJR1750 (see figure) with the addition of the parB (plasmid stability) and aphA (kanamycin resistance) genes of pKG1022 (drawn as a linear piece of DNA for convenience but it is a circular plasmid). You decide to cut pMJR1750 at the blunt ScaI site (5′ AGT?ACT) to inactivate the ampicillin gene, Apr and insert the parB and aphA genes thereby cutting pKG1022 with the blunt restriction enzyme HincII (5’GTC?GAC). Your cloning procedure consists of cleaving each plasmid with the appropriate enzyme, mixing the DNA, ligating, and transforming the ligated mixture into an E. coli host that has the lacZ+ gene deleted (from its chromosome).

1. Cloning Problem (30 pts). You desire to stabilize a segregationally-unstable plasmid (the E. coli host tends to spit the whole plasmid out periodically with the loss of the recombinant gene) by adding a locus that has been found to stabilize plasmids by killing plasmid-free daughter cells as they arise (parB, also known as hok/sok). …

1. Cloning Problem (30 pts). You desire to stabilize a segregationally-unstable plasmid (the E. coli host tends to spit the whole plasmid out periodically with the loss of the recombinant gene) by adding a locus that has been found to stabilize plasmids by killing plasmid-free daughter cells as they arise (parB, also known as hok/sok). The new plasmid will consist of the unstable plasmid pMJR1750 (see figure) with the addition of the parB (plasmid stability) and aphA (kanamycin resistance) genes of pKG1022 (drawn as a linear piece of DNA for convenience but it is a circular plasmid). You decide to cut pMJR1750 at the blunt ScaI site (5′ AGT?ACT) to inactivate the ampicillin gene, Apr and insert the parB and aphA genes thereby cutting pKG1022 with the blunt restriction enzyme HincII (5’GTC?GAC). Your cloning procedure consists of cleaving each plasmid with the appropriate enzyme, mixing the DNA, ligating, and transforming the ligated mixture into an E. coli host that has the lacZ+ gene deleted (from its chromosome). Read More »

The magnetic circuit shown in Fig. P2.8 has a coil of 500 turns wound on the central limb which has an air-gap of 1 mm. The magnetic path from A to B via each outer limb is 100 cm and via the central limb 25 cm (air-gap length excluded). The cross-sectional area of the central limb is 5 cm x 3 cm and each outer limb is 2.5 cm x 3 cm. A current of 0.5 A in the coil produces an air-gap flux of 0.35 mWb. Find the relative permeability of the medium. 1 mm, Ø = 0.35 mWb A A = 7.5 cm 0.5A 122 A = 15 cm 500 Turns 100 cm 25 cm B Fig. P2.8

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What size SAE grade 5 bolt should be used to fasten together two pieces of 1045 sheet steel, each 4 mm thick and 6 mm wide, which are lapped over each other and loaded with 100 N, calculate the shear stress and normal stress.

What size SAE grade 5 bolt should be used to fasten together two pieces of 1045 sheet steel, each 4 mm thick and 6 mm wide, which are lapped over each other and loaded with 100 N, calculate the shear stress and normal stress. EXPERT ANSWER

Question 2[30 marks] 1. List five (main) advantages and disadvantages of a centrifugal pump. 2. It is required to pump cooling water from a storage pond to a condenser in a process plant situated 10 in above the level of the pond. 200 m of 74.2 mm i.d. pipe is available, and the pump has the characteristics given below. The head lost in the condenser is equivalent to 16 velocity heads based on the flow in the 74,2 mm pipe. If the friction factor ø=0.003 , estimate the rate of flow and the power to be supplied to the pump assuming an efficiency of 50 per cent. (20) Hint: The following formulae may assist Head losses: major losses + minor losses H L ​ =4f D L ​ g v 2 ​ +8 g v 2 ​ Reynolds number: R e ​ = μ ρνD ​

EXPERT ANSWER 1 ans:- Centrifugal Pump – Advantage & Disadvantage Small in size, space saving & less capital costs. Easy for maintenance. No danger creates if discharge v/v is closed while starting. Deal with large volume. Able to work medium to low head. Able to work medium to low viscous fluid. 2 ans:-

Problem 1: Use the information below, to answer the questions that follow. Enter the formulas into the yellow cells so that the cells will show the information requested.

Analysis of Waiting Lines Assignment Problem 1: Use the information below, to answer the questions that follow. Enter the formulas into the yellow cells so that the cells will show the information requested. Prairie State Bank operates a drive-up teller window that allows customers to complete bank transactions without getting out of their cars. On …

Problem 1: Use the information below, to answer the questions that follow. Enter the formulas into the yellow cells so that the cells will show the information requested. Read More »

A stratified soil is composed of three layers (clay, sand, and silt). The GWT is at the surface of the stratified soil. The silt layer which is underlain by the clay is overlain by the sand. Plan area of seepage is 14 m2.

A stratified soil is composed of three layers (clay, sand, and silt). The GWT is at the surface of the stratified soil. The silt layer which is underlain by the clay is overlain by the sand. Plan area of seepage is 14 m2. For clay:Ysat = 21.50 kN/m3H = 4.00 mK = 0.32 m/s For …

A stratified soil is composed of three layers (clay, sand, and silt). The GWT is at the surface of the stratified soil. The silt layer which is underlain by the clay is overlain by the sand. Plan area of seepage is 14 m2. Read More »