Explanation:
[ file ] Where , G is universal gravitational constant
m1 and m2 masses of object 1 and 2 respectively !!
r , is distance between the two object !!
:- If we decrease the distance between them the effect on Gravitational force will be : it increases due to the inverse proportionality between the gravitational force ( Fg ) and distance between object ( r² ) ..
..... Even it is inversely proportional to the square of the distance between object , the force will increase suddenly for a small change in r !!
The resistance of the circuit is 
Explanation:
We can solve the problem by applying Ohm's law, which gives us the relationship between current, potential difference and resistance in a circuit:
where
V is the potential difference
R is the resistance
I is the current
For the circuit in this problem,
V = 12.6 V
I = 25.4 A
Re-arranging the equation, we can solve for the resistance:
Learn more about current and potential difference here:
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In order to persuade the electrons in the wire to flow, you need
a potential difference between the ends of the wire. Then the
electrons will want to get away from the more-negative end and
go to the more-positive end. If both ends of the wire are at the
same potential, then the electrons have no reason to go anywhere,
and they just stay where they are.
Choice-d says this.
