Solve 18,19,20 no. Question plz

Dear student
Answer (18):
5 Conductors are metals like iron, copper, aluminum,steel, gold..Etc
F= G m1?m2/r^2
Where G is universal gravitational constant
Defination:- Every particles in the universe attracts every other particles with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance b/w the 2 masses.

1. V= u + at
2.s= ut +1/2 at^2
3.v^2- u^2=2as
Hope it will help.
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I answer inertia
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18 iron water copper aluminum graphite
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