Answer:
at T = 0ºC the change of state is from the solid state to the gaseous state
Explanation:
In this exercise we are asked about the changes of state, from the data we will assume that the material is water.
Water can exist in three solid states, liquid and gas, in a graph of pressure ℗ against temperature (T) there is a point called triple at T = 0.01ºC, below this point the curve has two states at high pressure solid and low pressure gas.
As a result of the previous ones at T = 0ºC the change of state is from the solid state to the gaseous state
 
        
             
        
        
        
Complete Question 
  The complete question is shown on the uploaded image 
Answer:
The tension on the shank is  
Explanation:
 From the question we are told that 
        The strain on the strain on the head is 
          The contact area is   
  
 Looking at the first diagram 
            At  600 MPa of stress 
                The strain is  
           At   450 MPa of stress 
                  The strain is   
  To find the stress at   we use the interpolation method
 we use the interpolation method
             
Substituting values 
               
             
              
Generally the force on each head is mathematically represented as
               
Substituting values 
              
                 
Now the tension on the bolt shank is as a result of the force on the 6 head which is mathematically evaluated as 
               
                   
               
                  
      
 
        
             
        
        
        
Your answer would be D. 
If an object has mass, it has gravity, and the more mass it has, the stronger its gravity. During the formation of planets, essentially, various matter and elements pulled and fused together (because of the gravity), forming planetesimals.
        
                    
             
        
        
        
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