A vestibule type rotating door for a large business has three panels, each 6 feet wide and 8 feet high has 400 people passing through every hour. The panels are fitted with an average of 1/64 inch crack all the way around and the expected maximum pressure differntial between the inside and the outside is 0.288 WG. Estimate the infiltration of exfiltration.

(show work)

2 If you deposit $1,000 now and are promised payments of $500 three years from now and $1,500 five years from now, the equation that will yield the correct rate of return is:

   A)   -1000 = 500(P/F,i,3) + 1500(P/F,i,5)

   B)   0 = 1000 + 500(P/F,i,3) + 1500(P/F,i,5)

   C)   1000 = -500(P/F,i,3) - 1500(P/F,i,5)

   D)   0 = -1000 + 500(P/F,i,3) + 1500(P/F,i,5)

3 For the equation: 5,000 = 1,000(P/F,i,1) - 2,000(P/F,i,2) + 7,000(P/F,i,7) + 7,000(P/F,i,9), the number of possible rate of return values is:

   A)   1

   B)   2

   C)   3

   D)   4

4there is more than one sign change in the net cash flow of a rate of return equation, the possible rate of return values will fall in the range of:

   A)   minus infinity to plus infinity

   B)   minus 100% to plus infinity

   C)   minus 100% to plus 100%

   D)   minus infinity to plus 100%

5 When multiple rate of return values are possible for a rate of return equation, one way to come up with a single value which satisfies the equation is:

   A)   Solve for the internal rate of return

   B)   Use the project net investment procedure

   C)   Eliminate all rate of return values above 100%

   D)   Eliminate all rate of return values below 0%

1. Describe the purpose of design guideline of VDI-2206 and VDI-2221.

2.Describe how VDI-2221 and 2206 can be implmented concurrently

3. Describe importance of developing a function block diagram in context of systematic design

Solve the following equations using the Newton-Raphason method. ( using matlab)

x^2+x*y^2 = 9

?3x^2 * y - y^3 = 4   

?initial estimation of (x,y) = (1.2, 2.5)

?please help.. using matlab and matlab code

An 8 in. diameter grinding wheel, 1 in. wide, is used in a surface grinding operation performed on a flat piece of low carbon steel. The wheel is rotating with a surface speed of 5,000 fpm, depth of cut of 0.002 in./pass and cross feed (w) of 0.15 in. The reciprocating speed of the workpiece is 20 ft/min., and the operation is performed dry. Letting C = 300 per in2 and the ratio of chip width to average undeformed chip thickness equal to 20, estimate the undeformed chip length. Estimate the undeformed chip thickness. Calculate the required grinding power in lb*in/min. What is the amount of cutting force required for this operation?

Methane is burned with air and the exhaust products are measured (on a dry, volumetric basis) to be 4.8% CO2, 0.12% CO, 12.25% O2, and balance N2. Determine (a) the air-tofuel ratio (mass based) (5 points), (b) equivalence ratio (5 points) (c) the percent theoretical air (%) (5 points), (d) the percent excess air (%) (5 points), and (e) exhaust dew point (°C) if the exhaust is at 1 atm (5 points). (25 points)

Methane is burned with air and the exhaust products are measured (on a dry, volumetric basis) to be 4.8% CO2, 0.12% CO, 12.25% O2, and balance N2. Determine (a) the air-tofuel ratio (mass based) (5 points), (b) equivalence ratio (5 points) (c) the percent theoretical air (%) (5 points), (d) the percent excess air (%) (5 points), and (e) exhaust dew point (°C) if the exhaust is at 1 atm (5 points). (25 points)

What are main differences between the Finite Difference Method and Finite Elements Method?

How are the boundary and interior values of the finite element solution obtained?

What are the principal polymers used in fiber-reinforced polymers?

what are the main trends in power and wing loading for climb, stall, landing distance, and cruise speed?

Consider a surface that has N sites each of which can adsorb one gas molecule. suppose that it is in contact with a gas with the chemical potential u. Assume that an adsorbed molecule has energy -e0 compared to one in the gas phase. Show that the surface coverage T (the ratio of adsorbed molecules to adsorbing sites) is given as

T=1/(exp(-(u+e0)/kT)+1). (Hint: You can ignore the volume change upon adsorption, which means that the Gibbs free energy is equal to the Helmholtz free enrgy in this system.)

Fluid Mechanics Pipe Problem

Type 2 EXAMPLE. Water at 20°C (r=1000 kg/m3 , µ= 0.001 Ns/m2 ) is flowing through 100 m 3/8" steel Sch 80 pipe. Inlet pressure is 11 kPa and outlet pressure is 10 kPa. Z1 = 10 m and Z2 = 2 m.

Find Q.

R22 is compressed adiabatically and reversibly from saturated vapor at -20 deg F to 200 psia. Find the final temperature and the specific work done.

A counterflow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m², and the design value of the overall convection coefficient (without any fouling) is 38 W/m²K. During a test run, engine oil flowing at 0.1 kg/s is cooled from 110^oC to 66^oC by water supplied at a temperature of 25^oC and a flow rate of 0.18 kg/s. Determine whether fouling has occurred during the service period. If so, calculate the fouling factor, R^”_f (m²K/W). Specific heat of engine oil is 2166 J/kgK, and water is 4178 J/kgK.

What is R^”_f = x 10^-3 m²K/W?