The universe has trillions of galaxies and counting. Astronomers give names to each galaxy base on its shape (e.i, Sombrero galaxy, Milkyway Galazy, ect,.).
Also, the size of the galaxy is taken into account and their color. 
 
        
             
        
        
        
Mechanical energy 
I think
        
             
        
        
        
Answer:
<em>Mitosis</em>
Explanation:
Mitosis: Mitosis is a cell or nuclear division following the duplicate of the chromosomes, whereby each daughter cell or nucleus has exactly the same chromosomes content as the parent. In other words, mitosis is a cell division in which daughter cells have the same number of chromosomes as the parent cell.
Mitosis takes place during organism's growth, development, and asexual reproduction. in plants mitosis takes place in the terminal bud of the shoot at the tip of the roots and shoots. In animal mitosis occur at growth centres which are everywhere.
Mitosis produce diploid number, in order word, the number of chromosomes in each somatic cell of an organism is called the diploid number (2n)
Example of mitosis is the multiplication of the skin covering a child's body during growth
 
        
             
        
        
        
A wooden log is displaced to a distance of 20m in 10 seconds by applying 500N effort . Calculate the workdone and power...
Solution,
displacement = 20 m 
time = 10 sec 
force = 500 N 
work done = ? 
power = ? 
Now , 
work done = f × s 
 = 500 N × 20 m 
 = 10000 j 
Now , 

~nightmare 5474~
 
        
                    
             
        
        
        
-- Volume . . . made out of 3 dimensions of length
-- Density . . . made out of mass, and 3 dimensions of length
-- Area . . . made out of 2 dimensions of length
-- Acceleration . . . made out of length and time
<em>Mass</em> is not made out of anything else.  It's fundamental.  A few other fundamental things are length, time, and electric charge.