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
 
        
             
        
        
        
Answer:
86 mm
Explanation:
From the attached thermal circuit diagram, equation for i-nodes will be
 Equation 1
 Equation 1
Similarly, the equation for outer node “o” will be
 Equation 2
 Equation 2
The conventive thermal resistance in i-node will be
 Equation 3
 Equation 3
The conventive hermal resistance per unit area is
 Equation 4
 Equation 4
The conductive thermal resistance per unit area is
 Equation 5
 Equation 5
Since  is given as 100,
  is given as 100,  is 40
  is 40  is 300
  is 300  is 25
  is 25  
Substituting the values in equations 3,4 and 5 into equations 1 and 2 we obtain
 Equation 6
  Equation 6
 
 
 
 Equation 7
 Equation 7
From equation 6 we can substitute wherever there’s  with 3000L+40 as seen in equation 7 hence we obtain
 with 3000L+40 as seen in equation 7 hence we obtain
 
The above can be simplified to be
 
 
-3000L=1.665-260
 
Therefore, insulation thickness is 86mm
 
        
             
        
        
        
Answer: At 520 feet between the piers, the center arch of Eads Bridge was the longest rigid span ever built at the time of its construction (only a few suspension bridges had longer spans).
Explanation:
 
        
             
        
        
        
Answer:
A. Forces that act perpendicular to the surface and pull an object apart exert a tensile stress on the object.
Explanation:
Tensile stress is referred as a deforming force, in which force acts perpendicular to the surface and pull an object apart, attempting to elongate it.
 The tensile stress is a type of normal stress, in which a perpendicular force creates the stress to an object’s surface.
Hence, the correct option is "A."
 
        
             
        
        
        
Answer:
We would need background context,
Explanation:
Then I would be happy to help!