Answer:
h - height
Explanation:
gravitational potential energy = m * g * h
m stands for mass. Mass doesn't change in physics
g stands for gravitational acceleration. It is a constant.
h stands for height. When the skater moves up and down the track the height from the ground changes. Therefore this variable does change.
 
        
             
        
        
        
Answer:
B
Explanation:
B uses correct punctuation of quotes.
 
        
             
        
        
        
Answer:
Compositional Layers
Layer	Depth
Crust	0-100km silicates
Mantle	100-2900km iron and magnesium silicates
Core	2900-6370km metals
Hope this helps!!! 
 
        
             
        
        
        
Answer:
the right answer is
tRNA bonds with mRNA, bringing in amino acids.
Explanation: