The formula is Force = coefficient of friction times the weight or normal force (in newtons). Plug the numbers in the formula. Do the simple division math. The coefficient of friction should be any number between 0 and 1. If your answer is smaller than 0 or greater than 1, go back and check your work. The answer for this question is C. 0.38   
        
                    
             
        
        
        
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Answer:
All the planets orbit the Sun in nearly the same plane.
 
        
             
        
        
        
First, we need to convert the pressure in SI units. Keeping in mind that 

:

The initial and final volume of the gas are (keeping in mind that 

):


So, the work done on the gas by the surrounding is

And the final positive sign means that this work corresponds to an increase in internal energy of the gas.