Answer: C. 1.64 x 10-3 m/s2
        
             
        
        
        
That's ONLY true when the pendulum is hanging 
in the center position and not moving.
        
             
        
        
        
I think it is b , that what I would i pick
        
             
        
        
        
Answer:
(4) The physical and chemical properties of these minerals determine how humans use them.
Explanation:
All the materials and the metals found on earth shows certain characteristics naturally or in their physical state. These physical characteristics can be their look, their structure, their color, strength, melting point, boiling point, density, etc. 
And chemical properties of the metals are defined as those characteristics or features of the metals that it exhibits when these metals reacts chemically.
The physical properties as well as the chemical properties distinguishes each metal from each other. These properties determines how people use these metals in their life.
 
        
             
        
        
        
Unicellular: An organism that consists of a single cell
Multicellular: An organism with multiple cells
Eukaryotic: A cell that contains a nucleus 
Prokaryotic: A cell with no nucleus 
Autotrophic: An organism that has the ability to make their own food
Heterotrophic: Organism that cannot create their own food
Asexual reproduction: When an organism has the ability to create offspring without the help of another organism 
Sexual Reproduction: When two organisms create an offspring using the gametes