Someone, please help me!!!! 
no stupid comments please!        
      
                
     
    
    
    
    1  answer:
            
              
Answer: 
1) d 2) a 3)
Explanation: 
4) B would be brighter and more useful than A because A is all bunched up together without any room for extra energy meanwhile B has plenty of room for more energy
 
                                
             
         	
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Answer: 
   g ≈ 7.4 m/s²
Explanation: 
The acceleration due to gravity on planet XX is ...
   g = GM/r² = (6.67·10^-11 × 4·10^22)/(6·10^5)^2
   g ≈ 7.4 m/s² 
 
        
             
        
        
        
A: Some physical properties change, but the substance keeps its identity.
        
                    
             
        
        
        
Answer: 
Stress does not cause illness, but restrains the immune system's ability to fight foreign invaders
Explanation: 
It's correct :)
 
        
             
        
        
        
It is number 3 because I know it is