Assume a dimension that a customer is interested in is given by R = x0.5+y. The variables x and y are determined using standard calibration gage pins, where the nominal value of x is 0.9” and the nominal value of y is 0.2”. The manufacturer of the gage pins states that the pins have error bounds of +0.0002” with a quality rate of 95.45%. Assume that the gage pin diameter follows a normal distribution. What is the expanded uncertainty with a 99.73% coverage probability? Use an appropriate estimate of the standard uncertainties of y and z in your calculation.
In: Mechanical Engineering
Determine the roots of f (x) = −12 − 21x + 18x2 − 2.75x3 graphically. In addition, determine the first root of the function with (b) bisection and (c) false position.
For (b) and (c) use initial guesses of xl = −1 and xu = 0 and a stopping criterion of 1%.
In: Mechanical Engineering
For questions 1, 2, and 3, walk through each question by hand, then
use the “disp” command in your MATLAB script to display your answer
to the screen.
1. What is the final value of x? x = 10; if round(x/5) == x/5 x = 2
* x + 4; elseif x == 10 x = 4 * x; else x = 0; end
2. What is the final value of x? x = 10; if round(x/3) == x/3 x = 2
* x + 4; elseif x == 10 x = 4 * x; else x = 0; end
3. What is the final value of x? x = 9; if round(x/4) == x/4 x = 2
* x + 4; elseif x == 4 x = 4 * x; else x = 0; end
4. Write a MATLAB script that calculates the total cost for Giant
Slinkys: • Ask the user to input the quantity of Giant Slinkys they
wish to have shipped. • Make sure the user's input is a positive
integer. • 10 or fewer Giant Slinkys cost $21.99 each. • 11 to 50
Giant Slinkys are $19.99 each • 51 to 100 Giant Slinkys are $17.99
each • More than 100 Giant Slinkys cost $15 each. • Sales tax is
9.5% • Shipping is $10 for each group of 10 Giant Slinkys. For
example: ◦ Shipping for 1 Giant Slinky is $10; Shipping for 8 is
also $0; Shipping for 10: $10. ◦ Shipping for 11 Giant Slinkys is
$20; Shipping for 15, also $20; Shipping for 20: $20. • Shipping is
free for orders of 50 or more Giant Slinkys
In: Mechanical Engineering
In: Mechanical Engineering
Ethyl alcohol flows through a horizontal tube having a diameter of 25 mm. If the mean velocity is 0.18 m/s, what is the magnitude of the pressure drop per unit length along the tube (in Pa/m)?
What is the velocity at a distance of 5 mm from the tube axis (in m/s)?
In: Mechanical Engineering
In: Mechanical Engineering
What is the purpose of a pressure relief valve? What is a sequence valve? What is it purpose? What is a pressure compensated flow control valve? What is a servo valve? How does it work?
In: Mechanical Engineering
In your own words explain how chain branching affects the amount of crystallinity of PE, the strength of PE, and the elongation of PE.
In: Mechanical Engineering
Determine the entrance conditions at the hub of an axial flow stator-rotor compressor. The mean-velocity diagram has a flow coefficient of 0.3 and work coefficient of 0.446. The exit flow is at axial direction. The hub diameter is 0.75 of the mean diameter. The axial flow velocity has a relationship
In: Mechanical Engineering
Delta Wing Aircraft Specifications
(do the necessary assumptions if needed)
Wing Area: 585 m2
Wing Span: 32 m
Taper ratio: 0.019
Leading Edge Sweep angle: 65.57°
Wing loading: 4070 N/m2
Cruise Mach Number: 3
Cruise altitude: 22.5 km
(L/D) cruise = (L/D) max = 9
Calculate the cruising angle of attack?
Write down the cruising drag polar equation?
Using the drag polar found in (b), calculate (CL1/2/CD) max and corresponding Mach number maximizing (CL1/2/CD).
In: Mechanical Engineering
Calculate an overall heat loss coefficient for a plate at 50℃, facing up, when exposed to an ambient temperature of 10℃. The plate emittance is 0.88, the dew point is 3℃, and the wind heat transfer coefficient is 25 W/m2℃. Assume time is midnight
In: Mechanical Engineering
for the bourdon tube gauges , how to calibrate the pointer to zero ?
In: Mechanical Engineering
How do you find the specific volume of R-134A at P=700 kPa and T= 120 C? I know it is from the tables but I can't seem to figure out how to get the number: v = 0.43358 m^3/kg
In: Mechanical Engineering
all journal bearing has a shaft diameter=1.25in and suppports a load of 1200lbf. the bushing is 1.25-in long and has a bore diameter=1.25in. shfat speed=1500 rev/min. average film temperature=115.4oF and SAE grade 30 lubricant is used. average clearance =0.001125 in. Find
a) magnitud and location of min oil-film thickness
b) total lubricant volumetric flow rate
c) max oil-folm pressure and its angular location
d) power loss
In: Mechanical Engineering
A 5 MW gas turbine generating set operates with two compressor stages with intercooling between stages; the overall pressure ratio is 9/1. A high pressure (HP) turbine is used to drive the compressors. A low pressure (LP) turbine drives the generator (which generates the 5 MW). The temperature of the gases at the entry to the HP turbine is 650 °C and the gases are reheated to 650 °C after expansion in the first turbine (before entering the second turbine). The exhaust gases leaving the LP turbine are passed through a heat exchanger to heat the air leaving the HP stage compressor (before they enter the combustion chamber). The compressors have equal pressure ratios and intercooling is complete between stages. The air inlet temperature to the unit is 15 °C. The isentropic efficiency of each compressor stage is 0.8 and the isentropic efficiency of each turbine stage is 0.85. In the heat-recovery heat exchanger, the exhaust from the low pressure turbine is heating the exhaust from the high pressure compressor to 420 °C, before the LP turbine exhaust is vented and the HP compressor exhaust (now exiting the heat recovery heat exchanger) is sent to the combustion chamber (to be heated to 650 °C). The heat exchangers (the intercooler, heat recovery heat exchanger and the combustion chambers) all operate at constant pressure. Pressure losses and changes in kinetic and potential energies can be neglected.
a)Draw a diagram of this cycle.
b)Calculate the cycle efficiency.
c)Determine the mass flow rate through the process.
In: Mechanical Engineering