Question 5 Engineer X R Join Research x Users/DELL/Downloads/Summerfinal_upload24_8.pdf Q.6 If 500 g of a 40 wt% Cu-60 wt% Ag alloy is slowly cooled from 1000°C to just below 780°C (see Fig.): (a) How many grams of liquid and proeutectic alpha are present at 800°C? (b) How many grams of liquid and proeutectic alpha are present at 780°C + AT ? C) How many grams of alpha are present in the eutectic structure at 780°C - AT? (d) How many grams of beta are present in the eutectic structure at 780°C - AT ? [7 Marks] -C 1084 59 1000 961.93 900 L 780 912 800 719 80 B 700 6.00 500 400 AL 0 50 End of paper 49 20 30

A methanol–water feed stream is introduced to a vaporizer in which a molar fraction f of the feed is vaporized. The feed has a methanol mole fraction of xF = 0.40, and the vaporizer operates at a pressure of 1 atm abolute and 80°C. Vapor and liquid leaving the device are in equilibrium at the temperature and pressure of the system and have methanol mole fractions of y and x, respectively. A Txy diagram for methanol-water mixtures at 1 atm absolute is shown below. For the vaporizer temperature of 80.0°C and xF = 0.40, the feed to the vaporizer and the liquid and vapor product streams are shown as points B, A, and C respectively. a. Calculate the fraction of feed vaporized (moles vapor/moles feed) for the conditions above. b. Repeat the calculation for xF= 0.75 and T = 70 °C. 110 Vapor-Liquid Equilibrum Data for CH3OH+Water at p = 1 atm 100 90 Temperature (°C) Α. B C с 80 Vapor Liquid 70 60 0 1.0 0.2 0.4 0.6 0.8 X, y (CH3OH liquid and vapor mole fractions)

The elastic potential energy, U, stored in a spring is given by U = 1/2kx^2, where k is the elastic constant of the spring and x is the length of the spring. What are the dimensions of k?

1. Typical investment a. Model a typical investment for the company in terms of how long it lasts and what the cash flows look like over time. If the company is in more than one business or more than one type of investment, look at differences across businesses and investments. b. List out the sources of variability in the cash flows on a typical project and tie it back to risk measures used for the company.

Use Algorithm 3.2 to construct the interpolating polynomial of degree three for the unequally spaced points given in the following table: x f(x) -0.1 5.30000 0.0 2.00000 0.2 3.19000 0.3 1.00000

Underground water as shown Figure 2 is to be pumped by a 78%-efficient 5 kW submerged pump to a pool whose free surface is 30 m above the underground water level. The diameter of the pipe is 7 cm on the intake side and 5 cm on the discharge side. Determine i. The maximum flow rate of water. ii. The velocity of the water through the pipe at the discharge side. Assume the elevation difference between the pump inlet and the outlet and the effect of the kinetic energy correction factors to be negligible. Pool 30 m Figure 2

3.17. Consider the following relations for a database that keeps track of automobile sales in a car dealership (OPTION refers to some optional equipment installed on an automobile): CAR(Serial_no, Model, Manufacturer, Price) OPTION(Serial_no, Option_name, Price) SALE(Salesperson_id, Serial_no, Date, Sale_price) SALESPERSON(Salesperson_id, Name, Phone) First, specify the foreign keys for this schema, stating any assumptions you make. Next, populate the relations with a few sample tuples, and then give an example of an insertion in the SALE and SALESPERSON relations that violates the referential integrity constraints and of another insertion that does not.