Explain with sketch the hydrodynamic effect in hydrodynamic journal bearings.

there is a vertical air space and heat is transferred horizontally. Surface temperature on the two sides of the air space are -10 and 10F respectively. The thikness and effective emmitanceof the air space is 1.5'' and 0.35 respectively. Find U value in IP unit

Write a user-defined MATLAB function that uses classical fourth order Runge-Kutta method to solve a first order ODE problem dydx = f(x, y) in a given interval a ? x ? b with initial condition y(a) = y0 and step size of h. For function name and arguments, use [x,y] = myrk4(f, a, b, h, y0)

Check your function to find the numerical solution for dydx=?1.2y+7e^(?0.3x) in the interval 0 ? x ? 4 with initial condition y(0)=3. Run your program three times for h=1.0, 0.1, 0.01 and plot all results along with analytical solution y=(70/9)*e^(?0.3x)?(43/9)*e^(?1.2x) on the same figure.

How can you make glass that is

1) MechanicallyFlexible, 2) Electrically Conductive, and 3) Optically Transparent?

The pressure p and volume v of a given mass of gas are connected by the relation

k=(p+a\v^2)(v-b)

where a, b, and k are constants.

Using the composite trapezoidal method, write a MatLab script to approximate the work done by the gas in expanding from an initial volume to a final volume. Express p in terms of v.

Where W = Integral (Pdv)

Describe the effect of both temperature and strain rate on the stiffness, strength and ductility of viscoelastic polymer materials.

Regarding the fracture mechanism of metals, polymers and ceramics

(a) Explain why FCC metals show a ductile fracture even at low temperatures while BCC metals do not.

(b) What is crazing? What can you say about the Poisson’s ratio of the crazed material?

(c) Generally, in ceramics, intergranular fracture is preferred to cleavage fracture; however, in metals, transgranular fracture is the preferred mechanism for brittle failure. Why? Use a physical reason supported with an equation in your answer.

13.75 Air enters the compressor of a simple gas turbine power plant at 70F, 1 atm, is compressed adiabatically to 40 lbf/in.2, and then enters the combustion chamber where it burns completely with propane gas (C3H8) entering at 77F, 40 lbf/in.2and a molar flow rate of 1.7 lbmol/h. The combustion products at 1340F, 40 lbf/in.2 enter the turbine and expand adiabatically to a pressure of 1 atm.The isentropic compressor efficiency is 83.3% and the isentropic turbine efficiency is 90%. Determine at steady state

(a) the percent of theoretical air required.

(b) the net power developed, in horsepower.

what is the difference between electrode and filler in welding process?how do you select proper electrode and filler in your process?

Provide a summary of the ASTM E112–12 standard’s definition of the grain size number G. Your summary should give the precise mathematical definition for G. Your summary should also supply a conceptual description of G; this description should not require significant technical background to understand. • Provide a summary of the Lineal Intercept Procedure described in the ASTM E112–12 standard. Your summary should give sufficient detail that someone could use it to compute the grain size number G without any other information.

Overall what exactly is G? What is ASTM E112-12? What is the lineal intercept procedure?

Solve an equation where the input is a complex number.

s = x + j(3)^0.5*x

Equation: s^3+3*s^2+2s+k = 0

Solve for k and x

An ideal Brayton cycle stationary power plant operates with a pressure ratio of 10 to 1. if it is designed to generate 800 MW of power what is the minimum flow rate required?

Hydraulic excavators always have a 4-bar linkage between the inverted crank-slider mechanism and the bucket. Find a picture from which you can determine if this 4-bar linkage is a triple rocker, a double crank, a double rocker, or a crank-rocke