Write Matlab code and run them for the following:

a) Motion of a point in a circle

b) Motion of a line in a circle

c) Motion of slider crank mechanism

A trapezoid-shaped potato with base lengths of 1.5 cm and 2.0 cm respectively and a height/thickness of 0.5 cm was dried at a temperature of 70 ^oC in a convective oven for 24 h, if the surface temperature of the potato remained at 65 ^oC throughout the drying operation, describe the different changes that occurs during the constant and falling rate periods. If the convective heat transfer coefficient of stem/water is given as 850 W/m^2oC, calculate the amount of heat transferred into the potato

Cold air at a temperature of 10 C and a velocity of 3 m/s is moving parallel to a flat plate with a length of 6 m and a surface temperature of 75 C.

A) Find the transition location on the plate and the heat loss from the plate.

B) Repeat part (A) for water at the same velocity and temperature. The flat plate is made from copper.

My device is a BOILER

Choose the working fluid (substance) for your model device

Choose the inlet substance conditions such as temperature, pressure, velocity, mass flow rate or volume flow rate, quality, etc

Choose the outlet substance conditions based on the available information, or design the outlet conditions based on your research.

DRAW the system you are analyzing, including the SYSTEM BOUNDARY,

Show ALL INTERACTIONS between the system and surroundings on your drawing

Write the Conservation of mass equation as it applies TO YOUR SYSTEM

Write the Conservation of Energy equation as it applies TO YOUR SYSTEM

List all the assumptions and idealizations for the process

Calculate the thermo efficiency of the device. Be sure clearly shows equations, calculation process, intermediate answers/results,and final results. Units are critically important in all calculations.

Question: Air stored underground at 500 psia and 200 deg.F is first heated by natural gas combustion to 2,340 deg.F at constant pressure, then expanded in an 89% efficient turbine to atmospheric (14.7 psia) pressure. Part of the work of the turbine is used to compress ambient air at 70 deg.F and 14.7 psia to store it underground with an 85% efficient compressor. The air that is stored underground loses heat to the surroundings. The turbine powers an electric generator that is 93% efficient converting mechanical power to electrical power. Mass flow of air is 100 lb/s.

a. How much heat is added by the combustion of natural gas to the air stored underground that enters the turbine? [Answer: 513.6 Btu/lb]

b. What is the work produced by the turbine? [Answer: 379.7 Btu/lb]

c. What is the work of compression? [Answer: 260.2 Btu/lb]

d. At what temperature does the air exit the compressor? [Answer: 1154 deg.F]

e. Natural gas costs $3 per million Btu (MMBtu) and the electricity that is generated by this storage system is sold at $50/MWh. The system produces electricity from the stored compressed air for 5 hours per day. Calculate the net income from the system from electricity sales. [Answer: $2931 electricity sold, $2773 cost of natural gas, $158 net income from producing electricity 5 h/day.]

Detail design a gear reducer that would meet (at a minimum) the following design specification:

• Power to be delivered: 40 hp
• Input speed: 1750 rpm
• Output speed: 40–44 rev/min
• Usually low shock levels, occasional moderate shock
• Input and output shafts extend 4 in outside gearbox
• Maximum gearbox size: 18-in x 18-in base, 36-in height
• Output shaft and input shaft in-line
• Connection to a roller and conveyor via a chain drive

Other than the reducer design, design the intermediate and main shafts, including complete specification of the gears, bearings, keys, retaining rings, and shaft.

Briefly describe how a Photovoltaic cell (PVC) operate and generate electrical power. Support your answers with schematic sketches if necessary

Describe briefly what are the basic planning and design factors when applying “Escalator”?
Sketch the general layout and the main dimensions of an escalator inclined at an angle of 30o

The following details refer to a centrifugal pump. Outer diameter: 36 cm. Eye diameter: 18 cm. Blade angle at inlet: 28°. Blade angle at outlet: 20°. The flow velocity remains constant at 10 m/s. The whirl at inlet is zero. the manometric efficiency is 95%. If width at outlet is 3 cm, determine the power in W (η₀ = 83%).

A Rankine power cycle with reheat uses water as the working fluid. The inlet conditions of the
first stage turbine are 14MPa and 600C. All the turbines are known to have isentropic
efficiency of 85%, however the pump is assumed as an isentropic pump. If the maximum
temperature is kept at 600C and the condenser pressure is 6 kPa, by constructing a suitable
plot, show that having more than 2 reheat stages is not practical. (Hint: Take at least three
reheat pressures between 2 to 12 MPa)
Note: You may construct the plot on Microsoft Excel or manually on a graph paper. However,
all the calculations involved must be performed manually, in details and must be shown clearly.

please read the article 'Exley Chemical Company' and write what was the type of organization in the company? do you think the company should be organized in other ways ?

explain in the Fortran 77 code performance evaluation of evaporative cooler with corrugated fins and spherical fins...

mention it's parameter in Fortran 77 and plot graph using fortran 77

skip it.....if u can't answer it.....

A high carbon steel shaft is used in an engine and subjected to different loads. In order to
analyse the stress in the shaft, consider a rectangular element within the material. This
element is subjected to compressive stress of 135 MPa and shear stress of 166MPa in the
vertical direction. The compressive stress in the horizontal direction is 176MPa with a shear
stress of 115MPa.
a. Sketch the state of stress on this element.
b. Determine the maximum and minimum normal and shear stresses and their plane of
orientation.
c. If the yield strength of the material is 350MPa, Poison’s ratio is 0.32, and factor of
safety is 5, determine the diameter of the shaft to avoid failure.
d. What will be the difference in the analysis above if there is an additional torsional
load (T) and bending moment (M).
e. Show how you can use any theory of failure to design this shaft.
f. What are the challenges of applying the theories of failure in actual engineering
practice and as a design engineer, how would you deal with these challenges.