Answer:
 , repulsive
, repulsive
Explanation:
The magnitude of the electric force between two charged particles is given by Coulomb's law:
 
where:
 is the Coulomb's constant
 is the Coulomb's constant
 are the two charges of the two particles
 are the two charges of the two particles
r is the separation between the two charges
The force is:
- repulsive if the two charges have  same  sign
- Attractive if the two charges have opposite signs
In this problem, we have two electrons, so:
 is the magnitude of the two electrons
 is the magnitude of the two electrons
 is their separation
 is their separation
Substituting into the formula, we find the electric force between them:

And the force is repulsive, since the two electrons have same sign charge.
 
        
             
        
        
        
Answer:
 advance in the understanding of cellular movement 
Explanation:
All organisms are formed from cells, "understanding how cells are able to interact with other cells during development helps us understand how tissues and organs are established and, consequently, how the shape arises in embryos," explains Germán Reig
 
        
             
        
        
        
Answer:
 
dissociation of acetic acid (like vinegar) in water 
Explanation:
CH3COOH is basically vinegar (aka acetic acid)
dissociation of acetic acid in water 
so when you put vinegar in water it makes 2 hydrogen ions (H+) and acetate ( CH3C00 ) a chemical that used in making film
 
        
             
        
        
        
Answer:
True.
Explanation:
According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit. This statement is true. 
The Faraday's law of induction is given by :

Here, negative sign shows that the direction of induced emf is such that opposes the changing current that is its cause.
Hence, the statement is true.