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3 years ago

A typical aircraft fuselage structure would be capable of carrying torsion moment. a)True b)- False

Engineering

1 answer:

Taya2010 [7]3 years ago

8 0

Answer:

True

Explanation:

An aircraft is subject to 3 primary rotations

1) About longitudinal axis known as rolling

2) About lateral axis known as known as pitching

3) About the vertical axis known as yawing

The rolling of the aircraft induces torsion in the body of the aircraft thus the fuselage structure should be capable of carrying torsion

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Air enters a compressor operating at steady state with pressure of 90 kPa, at a temperature of 350 K, and a volumetric flow rate

natita [175]

Answer:

$T_{out} = 457.921\,K$

Explanation:

Before determining the exit temperature of air, it is required to find the specific enthalpy at outlet by using the First Law of Thermodynamics:

$-\dot Q_{out} + \dot W_{un} + \dot m \cdot (h_{in}-h_{out})=0$

$h_{out} = \frac{\dot W_{in}}{\dot m}- q_{out} +h_{in}$

An ideal gas observes the following mathematical model:

$P\cdot V = n\cdot R_{u}\cdot T$

Where:

$P$ - Absolute pressure, in kilopascals.

$V$ - Volume, in cubic meters.

$n$ - Quantity of moles, in kilomole.

$R_{u}$ - Ideal gas universal constant, in $\frac{kPa\cdot m^{3}}{kmole\cdot K}$ .

$T$ - Absolute temperature, in kelvin.

The previous equation is re-arranged in order to calculate specific volume at inlet:

$P\cdot V = \frac{m}{M}\cdot R_{u}\cdot T$

$\nu = \frac{R_{u}\cdot T}{P\cdot M}$

$\nu_{in} = \frac{(8.314\,\frac{kPa\cdot m^{3}}{kmol\cdot K} )\cdot (350\,K)}{(90\,kPa)\cdot (28.97\,\frac{kg}{kmol} )}$

$\nu_{in} = 1.116\,\frac{m^{3}}{kg}$

The mass flow is:

$\dot m = \frac{\dot V}{\nu_{in}}$

$\dot m = \frac{0.6\,\frac{m^{3}}{s} }{1.116\,\frac{m^{3}}{kg} }$

$\dot m = 0.538\,\frac{kg}{s}$

The specific enthalpy in ideal gases depends on temperature exclusively. Then:

$h_{in} = 350.49\,\frac{kJ}{kg}$

The specific enthalpy at outlet is:

$h_{out} = \frac{75\,kW}{0.538\,\frac{kg}{s} }-30\,\frac{kJ}{kg} + 350.49\,\frac{kJ}{kg}$

$h_{out} = 459.895\,\frac{kJ}{kg}$

The exit temperature of air is:

$T_{out} = 457.921\,K$

5 0

3 years ago

While discussing VIN numbers, Technician A says that the first digit of the VIN identifies the country where the vehicle was man

ruslelena [56]

Usually the first digit of the vin id’s the country it was built. So technician A would be correct. That’s usually how it is. Hope this helps. Please let me know if this is incorrect

4 0

3 years ago

When your fixing a car, what is the first thing you want to do?

Shtirlitz [24]

Answer:

Changing oil.

Explanation:

You need to regularly check and change your car’s oil to ensure smooth running of the vehicle and to prolong the lifespan of its engine.

6 0

3 years ago

50.38

klemol [59]

Answer:

International Building Code (IBC)

Explanation:

6 0

2 years ago

Stream Piracy – Kaaterskill, NY. Check and double-click the Problem 15 folder. The dark blue and orange streams highlight the pr

baherus [9]

Answer:

b. The pirating streams are eroding headwardly to intersect more of the other streams’ drainage basins, causing water to be diverted down their steeper gradients.

Explanation:

From the Kaaterskill NY 15 minute map (1906), this shows two classic examples of stream capture.

The Kaaterskill Creek flow down the east relatively steep slopes into the Hudson River Valley. While, the Gooseberry Creek is a low gradient stream flowing down the west direction which in turn drains the higher parts of the Catskills in this area.

However, there is Headward erosion of Kaaterskill Creek which resulted to the capture of part of the headwaters of Gooseberry Creek.

The evidence for this is the presence of "barbed" (enters at obtuse rather than acute angle) tributary which enters Kaaterskill Creek from South Lake which was once a part of the Gooseberry Creek drainage system.

It should be noted again, that there is drainage divide between the Gooseberry and Kaaterskill drainage systems (just to the left of the word Twilight) which is located in the center of the valley.

As it progresses, this divide will then move westward as Kaaterskill captures more and more of the Gooseberry system.

5 0

3 years ago