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.

I Need the solution of Elasticity Equations for Rectangular Plate Subjected to Bidirectional Sinusoidal load. (A closed form solution would be prefarable).Assume neccesary conditions wherever required.

This question pertains to Advanced mechanics of materials.

How would you measure the hardness of:

a) unmovable part of a large machine which is very heavy to transport?

b) an unknown alloy?

Write Real Life application for Hydraulic Pressure Control Valve using sequence valve in about 300 words?

2 7/8-in., 8.6-lbm/ft tubing, how do we get the inner diamiter from this data? the correct answer is (2.259”) but I don't know how to get it

12.  Which component of a vapor-compression refrigeration machine provides for the cooling effect in the conditioned space?

16.  Why would one choose a fire tube boiler instead of a water tube boiler?

17.  How does one de-humidify an air mass?

18.  Define an HVAC zone?

Consider laminar steady boundary layer at a flat plate. Assume the velocity profile in the boundary layer as parabolic, u(y)=U(2 (y/δ)-(y/δ)^2).

1. Calculate the thickness of the boundary layer, δ(x), as a function of Reynold's number.

2. Calculate the shear stress at the surface, τ, as a function of Reynold's number.

Re=ρUx/μ

The Equation of motion for the standard mass-spring-damper system is

Mẍ + Bẋ + Kx = f(t).

Given the parameters {M = 2kg, B = 67.882 N-s/m, K = 400 N/m}, determine the free response of the system to initial conditions { x₀ = -1m, v₀ = 40 m/s}. To help verify the correctness of your answer, a plot of x(t) should go through the coordinates {t, x(t)} = {.015, -0.5141} and {t, x(t)} = 0.03, -0.2043}.

determine the steady-state response of the system to sinusoidal inputs of unit amplitude at specified frequencies. You may use any initial conditions you wasn’t for this section. Use the following frequencies: ω = {0.2, 1, 6, sqrt (200), 20, 100, 1000} rad/s.

Modify your Matlab code to numerically simulate the response of the system to the frequencies listed above. Simulate one frequency at a time. Simulate for a sufficient time that the system will have attained steady state. Plot three periods of the systems’s response at steady state (so the initial time value on the plot will not be t = 0). Then estimate the amplitude of the response for each frequency; you should have seven amplitudes when you are done.

Make a second plot where you plot the amplitudes determined above against the frequencies (make a frequency response magnitude plot). The x-axis should be logarithmic and the y-axis should be in dB. CLEARLY LABEL YOUR AXES. For the plot, connect the points with solid black lines with a LineWidth of 3.

Evaluate │H(jω)│ for the frequencies: ω = {0.25, 1.5, 6.5, 15, 25, 150, 800} rad/s. Do this BY HAND. Clearly show your work. Then plot the resulting {ω, │H(jω)│} points as green diamonds using Markersize of 10 and LineWidth of 3.

The Equation of motion for the standard mass-spring-damper system is

Mẍ + Bẋ + Kx = f(t).

Given the parameters {M = 2kg, B = 67.882 N-s/m, K = 400 N/m}, determine the free response of the system to initial conditions { x₀ = -1m, v₀ = 40 m/s}. To help verify the correctness of your answer, a plot of x(t) should go through the coordinates {t, x(t)} = {.015, -0.5141} and {t, x(t)} = 0.03, -0.2043}.

Numerically simulate the response of the system using the Matlab function ode45. Plot the displacement of the mass as a function of time for the first 0.5s. Use a time-resolution of 0.001s (have ode45 return values of x(t) at 1ms intervals). This plot should be a solid black line with a LineWidth of 3.

“Hold” the plot and superimpose the two points listed above (the two {t, x(t)} pairs). Use red circles to show those points. Make the circles’ Markersize of 10 and LineWidth of 3.

Determine the exact analytic (“hand”) solution to the problem. Use Matlab to calculate the values of that solution at 0.05s time steps. Superimpose that data on top of the numerical solution (and the two red circles) using blue diamonds with the same Markersize and LineWidth parameters as for the circles.

The Equation of motion for the standard mass-spring-damper system is

Mẍ + Bẋ + Kx = f(t).

Given the parameters {M = 2kg, B = 67.882 N-s/m, K = 400 N/m}, determine the free response of the system to initial conditions { x₀ = -1m, v₀ = 40 m/s}. To help verify the correctness of your answer, a plot of x(t) should go through the coordinates {t, x(t)} = {.015, -0.5141} and {t, x(t)} = 0.03, -0.2043}.

Numerically simulate the response of the system using the Matlab function ode45. Plot the displacement of the mass as a function of time for the first 0.5s. Use a time-resolution of 0.001s (have ode45 return values of x(t) at 1ms intervals). This plot should be a solid black line with a LineWidth of 3.

“Hold” the plot and superimpose the two points listed above (the two {t, x(t)} pairs). Use red circles to show those points. Make the circles’ Markersize of 10 and LineWidth of 3.

Determine the exact analytic (“hand”) solution to the problem. Use Matlab to calculate the values of that solution at 0.05s time steps. Superimpose that data on top of the numerical solution (and the two red circles) using blue diamonds with the same Markersize and LineWidth parameters as for the circles.