Engineering Answers

Discuss the effective measures of urban noise control from the perspective of urban functional area division

d²C/ dy²= [dC²/dȳ². (1/√(y)) + dC/dȳ .d/dȳ (1/√(y))]

please try to bring the equation a modified Bessel Equation of appropriate order. Identify the the order and write down the analytical solution for the concentration distribution C= f (ȳ) and thus C= f(z) using modified Bessel Functions.

The values are given if you need it.

reaction rate constant (k) =0.05 cm/s

Diffusion coefficient of ‘A’ (D) = 0.01 cm2/s

The cavity opening at the top (a)= 0.1 cm

Concentration of ‘A’ at z=0 (C₀)= 1 mol/cm3

Length (L)= 1 cm

Steam turbine is receiving 1,073 lb/hr of steam, determine the kW output of the turbine if the work done by steam is 2,121 BTU/lb.

State two assumptions made when doing capital rationing using a PW analysis for unequal-life

projects.

Define the following terms: bundle, contingent project, dependent project.

Determine the bearings of the lines?

Bearing of lines AB= N 60.00964° E

Angle B = 81°20'14"

Angle C = 200°21'42"

Angle D = 121°09'26"

Angle E = 91°50'11"

Angle F = 169°19'30"

1. Determine the bearings and azimuths of lines BC and CD shown in Figure 1. S65°18'29'E B 150°12' 210°25' Figure 1

Two resistors when connected in series have a total resistance of 40 ohms and when connected in parallel

has a total resistance of 7.5 ohms. Find the value of each resistor in ohm 

What is the equivalent area in sq. inch for a conductor 336 400 circular mil?

The throat and exit area of a convergent divergent nozzle in a wind tunnel are 4 cm and 10 cm respectively. The reservoir conditions are 10 bar and 95°C. Find out the Mach number, pressure and temperature of the air at the test section. Also find the mass flow rate.