To reduce the internal energy U of an ideal gas you need the gas to lose heat and/or do work.
        
             
        
        
        
Answer:
p = 8N/mm2
Explanation:
given data ;
diameter of cylinder =  150 mm
thickness of cylinder = 6 mm
maximum shear stress =  25 MPa
we know that
hoop stress is given as =
axial stress is given as =
maximum shear stress = (hoop stress - axial stress)/2
putting both stress value to get required pressure


t = 6 mm
d = 150 mm
therefore we have pressure 
p = 8N/mm2
 
        
             
        
        
        
60,000 meters. no explanation
        
                    
             
        
        
        
Answer:
Option A
Explanation:
The graph for this problem must depict the following ""Increased allocation of resources to reproduction relative to growth diminished future fecundity."
Hence, the survivor ship must be on the Y axis and the resources on the X axis. 
Here the resources include the number of seeds produced. 
hence, the higher is the number of seeds (resource), the lower is the survivorship (future fecundity)
Hence, option A is correct