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Murljashka [212]
3 years ago
7

Given the front and right views, create an AutoCAD isometric of the object. Save the drawing as lab5c.dwg. Grid size is 10mm. Yo

u may approximate the location of the hidden line as long as it is consistent with the other view.
Engineering
1 answer:
ki77a [65]3 years ago
4 0

Given the front and right views, create an AutoCAD isometric of the object. Save the drawing as lab5c.dwg. Grid size is 10mm. You may approximate the location of the hidden line as long as it is consistent with the other view is given below

Explanation:

1.Use CTRL-C to copy the lines to the Windows clipboard. Go to the 2D drawing and give the PASTESPEC (Paste Special) command. This will paste an image of the selected geometry into the other drawing. SInce it is an image and not AutoCAD entities the image quality will be limited.

2.Isometric drawing in AutoCAD 2014 and older versions:

At first, you need to change your snap settings to isometric. Type DS on the command line and press enter. Drafting settings window will pop up from this window select snap and grid tab and make sure Isometric snap radio button is checked.

3.To Display a Preset 3D View

Click View tab Views panel View Manager. Find. The View tab is not displayed by default, so an alternative method is to enter VIEW at the Command prompt. You can also employ the ViewCube in the top-right corner of the drawing area.

Select a preset view (Top, Bottom, Left, and so on).

4.If you aren't in model space, double-click inside the viewport to enter model space.

Go to Home tab > Modify panel (expanded)> Change Space to start the CHSPACE command.

At the prompt, select one or more objects to move.

Press Enter to end selection and the command. AutoCAD moves the selected objects to the other space.

5.

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Consider an aircraft powered by a turbojet engine that has a pressure ratio of 9. The aircraft is stationary on the ground, held
77julia77 [94]

Answer:

The break force that must be applied to hold the plane stationary is 12597.4 N

Explanation:

p₁ = p₂, T₁ = T₂

\dfrac{T_{2}}{T_{1}} = \left (\dfrac{P_{2}}{P_{1}}  \right )^{\frac{K-1}{k} }

{T_{2}}{} = T_{1} \times \left (\dfrac{P_{2}}{P_{1}}  \right )^{\frac{K-1}{k} } = 280.15 \times \left (9  \right )^{\frac{1.333-1}{1.333} } = 485.03\ K

The heat supplied = \dot {m}_f × Heating value of jet fuel

The heat supplied = 0.5 kg/s × 42,700 kJ/kg = 21,350 kJ/s

The heat supplied = \dot m · c_p(T_3 - T_2)

\dot m = 20 kg/s

The heat supplied = 20*c_p(T_3 - T_2) = 21,350 kJ/s

c_p = 1.15 kJ/kg

T₃ = 21,350/(1.15*20) + 485.03 = 1413.3 K

p₂ = p₁ × p₂/p₁ = 95×9 = 855 kPa

p₃ = p₂ = 855 kPa

T₃ - T₄ = T₂ - T₁ = 485.03 - 280.15 = 204.88 K

T₄ = 1413.3 - 204.88 = 1208.42 K

\dfrac{T_5}{T_4}  = \dfrac{2}{1.333 + 1}

T₅ = 1208.42*(2/2.333) = 1035.94 K

C_j = \sqrt{\gamma \times R \times T_5} = √(1.333*287.3*1035.94) = 629.87 m/s

The total thrust = \dot m × C_j = 20*629.87 = 12597.4 N

Therefore;

The break force that must be applied to hold the plane stationary = 12597.4 N.

5 0
3 years ago
A sinusoidal wave of frequency 420 Hz has a speed of 310 m/s. (a) How far apart are two points that differ in phase by π/8 rad?
Olin [163]

Answer:

a) Two points that differ in phase by π/8 rad are 0.0461 m apart.

b) The phase difference between two displacements at a certain point at times 1.6 ms apart is 4π/3.

Explanation:

f = 420 Hz, v = 310 m/s, λ = wavelength = ?

v = fλ

λ = v/f = 310/420 = 0.738 m

T = periodic time of the wave = 1/420 = 0.00238 s = 0.0024 s = 2.4 ms

a) Two points that differ in phase by π/8 rad

In terms of the wavelength of the wave, this is equivalent to [(π/8)/2π] fraction of a wavelength,

[(π/8)/2π] = 1/16 of a wavelength = (1/16) × 0.738 = 0.0461 m

b) two displacements at times 1.6 ms apart.

In terms of periodic time, 1.6ms is (1.6/2.4) fraction of the periodic time.

1.6/2.4 = 2/3.

This means those two points are 2/3 fraction of a periodic time away from each other.

1 complete wave = 2π rad

Points 2/3 fraction of a wave from each other will have a phase difference of 2/3 × 2π = 4π/3.

8 0
3 years ago
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