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This question can be solved using the concept of friction energy.
The thermal energy change is b "258.4 J".
The change in thermal energy will be equal to the friction energy produced during the motion of the box.

where,
μ = coefficient of kinetic friction = 0.4
f = force applied = 38 N
d = distance traveled by the box = 17 m
Therefore,

<u>E = 258.4 J</u>
Learn more about friction energy here:
brainly.com/question/1343045?referrer=searchResults
 
        
             
        
        
        
Answer:
Deltoid Force, 
Additional Information:
Some numerical information are missing from the question. However, I will derive the formula to calculate the force of the deltoid muscle. All you need to do is insert the necessary information and calculate.  
Explanation:
The deltoid muscle is the one keeping the hand arm in position. We have two torques that apply to the rotating of the arm. 
1. The torque about the point in the shoulder for the deltoid muscle,  
 
2. The torque of the arm,  
  
Assuming the arm is just being stretched and there is no rotation going on,
                          = 0
 = 0
                         = 0
 = 0
        ⇒           
                   
Where,
 is radius of the deltoid
 is radius of the deltoid
 is the force of the deltiod
 is the force of the deltiod
 is the angle of the deltiod
 is the angle of the deltiod
 is the radius of the arm
 is the radius of the arm
 is the force of the arm ,
 is the force of the arm ,  which is the mass of the arm and acceleration due to gravity
  which is the mass of the arm and acceleration due to gravity
 is the angle of the arm
 is the angle of the arm
 The force of the deltoid muscle is,
                                  
but  ,
 ,
                 ∴            
 
        
             
        
        
        
Answer is a) the force caused by the wend nag encountering wind and air.
        
             
        
        
        
Objects sink if they are denser than water