Density is a chemical property of an object.
The density of an object is constant.
Density is a derived unit of measure
Answer:
The magnitude and algebraic sign of q is 
Explanation:
Given that,
Point charge = -0.70 μC[/tex]
We need to calculate the force for all charges
The electric force at first corner

The electric force at opposite corner

The net force is

Put the value into the formula

The electric force at second corner

The net force acting on either of the charges is zero.
So, 



Hence, The magnitude and algebraic sign of q is 
Answer:
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