electrical energy into thermal energy.  Think of it this way you plug in the iron to the wall and you know electricity makes things work when u plug it in and an iron is using heat to straighten things. HOPE THIS HELPS!!!
 
        
             
        
        
        
The volume of the cube of unknown substance is  . The length of one side of the cube is 9 cm
. The length of one side of the cube is 9 cm 
<u>Explanation:</u>
As per the formula of mass and density, Mass / Density equals to volume. Therefore as the mass of the cube was given to be 81 g and the density of the cube is known to be 3.0 g/ ,, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as
,, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as
       
As it is a cube, the volume is product of length, breadth, and height. Here, all sides are same as it is the cube. 
         
        
       
 
        
             
        
        
        
Answer:
China
Explanation:
it has greatest/highest density
 
        
             
        
        
        
if it is just basic addition is would be 175