some examples of people who have a great leadership?

Imagine a diverging channel in place of the jet engine. Air enters the channel supersonically and accelerates further in the diverging geometry. The exit velocity is an even faster jet which would provide thrust to the aircraft. In this design no energy is required in the form of combustion. Would this design work? If yes, why, and if not, why not? Use equations to explain your physics based arguments. You can use a quantitative example to make your point.

An adiabatic mixing chamber with operating pressure of 180 kPa is used to mix cold water and hot water. The hot water enters at 80°C with mass flow rate of 4.1 kg/s. The cold water enters the chamber at 39°C and the mixture leaves at a temperature of 45°C. Determine (a) the mass flow rate of the cold water and (b) the rate of entropy generation during this process.  

Concept 1: Does turbulent flow or laminar flow have a greater heat transfer coefficient? Why?

Concept 2: For flow over a flat plate, why does the heat transfer coefficient decrease the greater the distance from the leading edge? (in answering, ignore the effects of flow regime transitions. i.e. assume the flow over the plate is all laminar or all turbulent).

Explain why adding Ti or Si can raise the eutectoid temperature of steels? What is the impact of having higher eutectoid temperature on using heat treatment to obtain Bainite? Use the CT or TTT diagram to explain.

A rectangular rosette is mounted on a steel plate having a modulus f elasticity E=200GN/m2 and Poission’s ratio =0.3. The strains measured are ε1=500×10-6; ε2=400×10-6; ε3= -100×10-6. Develop a MATLAB code to compute maximum shear stress and the orientation angle for the principle axis of the stress.

Post a one-page essay sharing your position on the following video clip:

Professor' Kaku's talk on The Future of Technology (https://www.youtube.com/watch?v=59Ejxp1tRss)

1.Can i use this material for making wheel(rim) for water hose cart? 2.Which kind of procuction made of this material? 3.What is manifacturing method of produce of them?*polytrimethylene terephthalate(PTT) *PBT * PC+PBT

An air engine is modeled after the ott cycle. Assume ideal gas and air standard cold valus for properties. Intake air is at 100kPa and Temperature of 27°C. The compression ration is 8:1. The heat added during ignition is 1740 kJ/kg
a) Draw and Label the Pv and Ts diagrams for the Otto cycle
b)Find the specific volume at intake state #1
c) Find the temperature at the end of the compression stroke
d) Find the Pressure at the end of the compression stroke
e) Calculate the efficiency for the cycle
f) For the Carnot air heat engine working between the same temperature resevoirs, what is the Carnot Efficiency

Make a list of the alloying elements used in high-speed steels. Explain what their functions are and why they are so effective in cutting tools.

Please answer me in computer-typing format. Thanks!

true and false questions

a. Any force F acting on a rigid body can be moved to an arbitrary point O provided that a couple is added whose moment is equal to the moment of F about point O.

b. The cross product obeys the commutative law, i.e. A x B = B x A

c. The centroid and center of mass of an object will coincide if we assume that the object is of non-uniform density.

d. In a truss problem that involves a large number of joints, if one is interested to nd the force in only a few members, then the method of joints is a faster approach than the method of sections.

e. In problems that involve shear and bending moment diagrams, if there are no couples applied at the ends of the beam, and if there are no supports imposing moment reactions at the ends, then the bending moment diagram always starts and ends at zero value for the beam's ends.

circle most appropiate choice

1a. Which of the following forces is NOT a conservative force?

a. friction force

b. spring force

c. gravitational force

d. none of the above

1b. In which circumstance is the force of friction between two surfaces at its maximum magnitude?

(Note: subscripts s and k specify the static and dynamic conditions, respectively.)

a. When friction angle satises (Φ < Φs)

b. When friction angle satises (Φ = Φs)

c. When friction angle satises (Φ = Φk)

d. None of the above

1c. Which of the following labels is WRONG?

a. 10e-6 : micro

b. 10e-9 : nano

c. 10e-12 : atto

d. 10e-15 : femto

1d. In curvilinear kinematics, when using the normal and tangential components to express the particle acceleration, the normal acceleration is always _________________.

a. positive

b. negative

c. pointing toward the center of curvature

d. choices a and c

1e. Which one of the following equations are WRONG with respect to cartesian unit vectors i, j, k, along x, y, and z axes, respectively? (Note: (X) indicates the cross product of two vectors)

a. i X j = k

b. k X j = -i

c. k X i = -j

d. j X j = 0

A case study on 'Computational challenges on Elasticity based problems'. (Problems with closed form solution would be preferable).

This topic pertains to Advanced mechanics of material.