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The certain water wave completes one cycle in 2 seconds. From this information alone, we can conclude that the period of the wave is indeed, 2 seconds.
The strength of the gravitational forces between two objects is completely determined by
<em>-- the masses of the objects</em>
<em>-- the distance between the centers of the objects.</em>
Nothing else has any effect on the strength of the gravitational forces between them. Not their motion, or other forces acting on them, or a steel, concrete, and Kryptonite wall between them.
The relation between intensity and distance is given by:
I=Pd2
I
=
P
d
2
I=
d
2
P
Therefore we can write an equation
