On a roller coaster, the greatest potential energy is at the highest point of the roller coaster
        
             
        
        
        
The answer is:  " 208 g " .
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Explanation:
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The formula/ equation for density is:
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D = m / V  ;  That is,  "mass divided by volume" ; 
  
Density is expressed as:
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                   "mass per unit volume";  in which the "mass" is expressed in units of "g" ("grams") ;  and the "unit volume" is expressed in units of:
    "cm³ " or "mL"; 
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           {Note the exact equivalent:  1 cm³ = 1 mL }.
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         →  The formula is:  " D = m / V "  ; 
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   in which:
     "D" refers to the "density" (see above), which is: "8.9 g/cm³ " (given); 
     "m" refers to the "mass" , in units of "g" (grams), which is unknown; and we want to find this value; 
                 
     "V" refers to the "volume", in units of "cm³ " ;
               which is:  "23.4 cm³ " (given);
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                 We want to find the mass, "m" ; so we take the original equation/formula for the density:
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              D  =  m / V ; 
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             And we rearrange; to isolate "m" (mass) on ONE side of the    equation; and then we plug in our known/given values;
 to solve for "m" (mass);  in units of "g" (grams) ;
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    Multiply each side of the equation by "V" ; 
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             V * { D  =  m / V } ;  to get:
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      V * D = m ;   ↔   m = V * D ; 
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           Now, we plug in the given values for "V" (volume) and "D" (density) ;     to solve for the mass, "m" ; 
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            m  =  V * D ; 
 
           m  =  (23.4 cm³) * (8.9 g / 1 cm³)  = (23.4 * 8.9) g = 208.26 g ;
  
 →  Round to "208 g" (3 significant figures);  
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The answer is:  " 208 g " .
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Answer:
fly......................
 
        
                    
             
        
        
        
Answer:
<h3>C no.</h3>
Explanation:
<h2><em>M</em><em>a</em><em>r</em><em>k</em><em> </em><em>m</em><em>e</em><em> </em><em>m</em><em>e</em><em> </em><em>b</em><em>r</em><em>a</em><em>i</em><em>n</em><em>l</em><em>i</em><em>e</em><em>s</em><em>t</em><em> </em><em>p</em><em>l</em><em>z</em><em> </em><em>i</em><em> </em><em>r</em><em>e</em><em>a</em><em>l</em><em>l</em><em>y</em><em> </em><em>n</em><em>e</em><em>e</em><em>d</em><em> </em><em>i</em><em>t</em><em> </em><em>(⌒▽⌒)</em></h2>