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Mechanical Engineering

NC Programming Created

Create an nc part program for making the slot shown in the attachment.The cutter diameter is 3/16 inch. The starting point is (0,0) at 2 inches to the left and 2 inches below the lower left corner of the part. There is also an example with a fully worked out solution included in the attachments. Write also the apt geometry and

Nc Part Program Differences

Explain the difference between the following parts of nc programs: (a) N001 G01 G41 X005 Y017 EOB N002 EOB (b) N001 G41 E0B N002 G01 X005 Y017 EOB

Manometers

2) See attachment for diagrams for both questions. 1) Two water manometers are connected to a tank of air. One leg of the manometer is open to 100kPa absolute pressure while the other leg is subjected to 90kPa. Find the difference in deflection between both manometers, delta ha - delta hb. 2) The inclined differential

Beam deflection at corner through centroid?

Sometimes the term centroid throws me for a loop. So, how would I set this problem up? I'm asked to determine the deflection of the tip of a beam for a 2000N load. The section is rotated 15 degrees. The load application point is through the centroid of section. Another way to describe the picture is that the beam is cocke

Beam deflection and Stress at corner?

So, how would I set this problem up? We're asked to determine the deflection of a beam location for a 2000N load. However, the force is directed up the corner NOT centroid. In other words, at beam corner up through the side wall. Kind of like a ledge holding a flower pot. Given load=2000N, on the tip of a 1m beam. Beam

Beam deflection and Stress at centroid?

Sometimes the term centroid throws me for a loop. So, how would I set this problem up? I'm asked to determine the deflection of the tip of a beam and max direct stress and location for a 2000N load. Given load=2000N, on the tip of a 1m beam. Beam dimensions are H=80mm B=W=40mm and t=thickness of 1.5mm.

Expression for a Floating Cube

a. The attachment shows a cube floating in a fluid. Derive an expression relating the submerged depth X, the specific weight of the cube, and the specific weight of the fluid. b. If the cylinder in the second attachment, made of a uniform material, is placed in fresh water at 95 degrees Celsius, how much of its height would

Determine modal ratios

For the two degrees of freedom structure shown, what are the values of the modal ratios if m1 = m2 = m, k1 = k, and k2 = 3k See Attached for question and details.

Determine frequency ratios

In the idealized model shown (See Attached) m = slug, k = 9 lb/ft and the viscous damping factor is 0.15. For what range of frequency ratios will the magnification be greater than 1? (please see attached for details)

Determine Viscous Damping Coefficient C

A Mass-Spring-Damper is tested to determine the value of the viscous damping coefficient c. Assume k = 10 lb/ft and m = 2 slug. The vibrational amplitude is observed to decrease by 33% of its initial value after two consecutive cycles. What is the value of the viscous damping coefficient c? a. 0.9376 b. 0.8442 c. 0.779

Simple Beam Concentrated Load at a Point

Draw the shear and bending moment diagram for the beam shown and find the value of the maximum bending stress. This case is a Simple Beam Concentrated Load at a Point. Solving for Moment of inertia, c-value, Reactions, Shear, Moment, and Max Bending Stress are discussed. Two different solution methods are discussed.

Find the fuel consumption

In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust. Consider such an engine where the air enters the diffuser at 200 m/s, 40 kPa, 240 K, and a flow rate of 40 kg/s. The comp

Ideal vapor-compression refrigeration cycle

An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of the refrigerant is 3 kg/min. Determine: - The coefficient of perf

Ideal Vapor-Compression Refrigeration System

An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refrigeration capacity is 5 tons. Determine: -the compressor power in hp -the rate of h

Compute the Gains Function

Please see the attached file for the full problem description. A plant has a transfer function It is desired to use a negative unity feedback with a PID controller and a prefilter. The goal is to achieve a peak time of .75 second with ITAE-type performance. Compute the gains required to meet the design specification, ,

Force, acceleration and mass

What force is required to accelerate a body with a mass of 15 kilograms at a rate 8/S2 ( the 2 is small obove the s)? a. 1.875 kg b. 23 kg c. 23N d. 120N

Radius of a Curve

A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second, the centripetal force on the car is 6,000 newtons. What is radius of the curve? a. 160 meters b. 80 meters c. 32 meters or d. 16 meters?

Mechanics: Efficiency of the Machine

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine? a. 92 percent b. 94 percent c. 96 percent d. 97 percent?

Question about Multipal choice question on mechanics

A car with a mass of 2,000. kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force on the car? a. 625 N b. 703N c. 15,625 N d. 20,250 N

Apparent Density, Theoretical Density and Void Volume

A compacted body of iron powder is sintered into a 20mm-diameter, 45-mm-tall cylinder which, upon weighing, is found to have a mass of 98g. Calculate the apparent density, the percentage of theoretical density, and the void volume (porosity) in percent.

Tensile Stress in a Bar of Steel

A bar of steel 1 by 1½ in cross section and 6 in long is subjected to a pull of 6000 lb. What is the average tensile stress in the bar?

Rankine Open Cycle

Rankine Open Cycle has an Ideal steam reheat cycle where steam enters the high pressure turbine at 3 MPa and 400C and then expands to 0.8 MPa. It's then reheated at constant pressure of 0.8 MPa to 400C and expands to 10kPa in the low-pressure turbine. Each turbine stage is entropic efficiency of 85% FWH is open T-S diagram for c

Brayton Cycle Gas Turbines

Large stationary brayton cycly gas turbine power plant delivers a powr output of 100MW to an electric generator . Minimum temperature is 300K so T1= 300k max temp is 1600k so T3= 1600k Minimum pressure in the cycle is 100kpa compressor pressure ratio is 14 to 1 so p2/p1 = 14 but turbine efficiency is 85% and compressor efficienc

Mobility and transit time

Consider the 2.0micrometer long GaAs device where the E-field is 5kV/cm and Mn*=.067M0. (a) Calculate the transit time of an electron through the device if the mobility is 8000 cm^2V-s. (b) The mean free path of an electron (average velocity x scattering time) is the average distance an electron travels between two consecu

Excess carrier concentrations and diffusion current density.

Consider a bar of p-Si that is homogeneously doped to a value of 3x10^15 at T=300K. The applied electric field is zero. A light source is incident on the end of the semiconductor. The excess-carrier concentration generated at x=0 is deltap(0)=deltan(0)=10^13/cm^3. Neglect surface effects. Mun=1200/cm^2/Vs. Mup=400/cm^2/Vs.