The answer would be the sound waves. 
        
                    
             
        
        
        
Explanation:
so sorry 
 
don't know but please mark me as brainliest please 
 
        
             
        
        
        
Answer:
μ = 0.375 
Explanation:
F = Applied force on the trash can = 75 N 
W = weight of the trash can = 200 N 
f = frictional force acting on trash can 
Since the trash can moves at constant speed, force equation for the motion of can is given as 
F - f = 0 
75 - f = 0 
f = 75 N 
μ = Coefficient of friction
frictional force is given as 
f = μ W
75 = μ (200)
μ = 0.375 
 
        
             
        
        
        
The gas planets usually have extremely high gravitational pulls, the surface isn't solid (since its a gas planet), and gas planets are larger than the inner planets. 
<span>Similarities- These planets all have moons and they both revolve around the sun (obviously).
Hope this helps.</span>