Answer:
magma forming above a subducting plate slowly rise into the overriding crust causing the formation of a volcano 
Explanation:
 
        
                    
             
        
        
        
Answer 1) The electric field at distance r from the thread is radial and has magnitude  
E = λ / (2 π ε° r)  
The electric field from the point charge usually is observed to follow coulomb's law:  
E = Q / (4  π ε°  )
)  
Now, adding the two field vectors:  
 =  {2.5 / (22 π ε° X 0.07 ) ; 0}
  =  {2.5 / (22 π ε° X 0.07 ) ; 0}  
Answer 2)  = {2.3 / (4 2 π ε°) ( - 7/ (√(84); -12 / (√84))
  = {2.3 / (4 2 π ε°) ( - 7/ (√(84); -12 / (√84)) 
Adding these two vectors will give the length which is magnitude of the combined field.  
The y-component / x-component gives the tangent of the angle with the positive x-axes. 
Please refer the graph and the attachment for better understanding.
 
        
             
        
        
        
The heat Q transferred to cause a temperature change depends on the magnitude of the temperature change, the mass of the system, and the substance and phase involved.
Explanation:
https://courses.lumenlearning.com/physics/chapter/14-2-temperature-change-and-heat-capacity/