Answer:A powder is an assembly of dry particles dispersed in air. If two different powders are mixed perfectly, theoretically, three types of powder.
Explanation:
 
        
             
        
        
        
Answer:
A. 0.289g/mL
Explanation:
Using the equation for density which is d = m/v  or density = mass/volume, we input 1.3g/4.5mL and get 0.289g/mL.
 
        
                    
             
        
        
        
Answer:
Sohan told Geeta that i had done my work
 
        
             
        
        
        
Geothermal, Wind ,Solar, and Water turbine.
I hope I helped.
        
             
        
        
        
C. Age structure. Hope I helped :)