<h2>
Option C is the correct answer.</h2>
Explanation:
Gravitational force is given by
G=6.674×10⁻¹¹ m³⋅kg⁻¹⋅s⁻²
M = Mass of object 1
m = mass of object 2
r = Distance between objects.
Here only variable is r value.
In case 1
In case 2
Option C is the correct answer.
<u>Any time the coin is on the table:</u>
-- gravity acting downwards
-- normal force of the table, acting upwards
<u>Any time the coin is moving:</u>
-- friction force, on the coin's underside
-- air resistance
Both of these act opposite to the direction of the coin's motion.
<u>During the flick, while your finger is still touching the coin:</u>
-- the flicking force, a push exerted by your finger
The force ends as soon as the coin leaves contact with your finger.
Answer: The hierarchical formation model suggests that galaxies may have been formed by subsequent mergers of smaller galaxies and that today each galaxy houses at least a supermassive black hole.
Explanation: During a fusion of galaxies, the stars that composes it suffer the tidal force, intensifying your action as the galaxies approaching. When two galaxies merges themselves, the astronomers believes that they loss a huge part of their mass, forming the supremassive black hole, that stays in the middle of the galaxie.
The supermassive black holes are originated from the evolution of high mass stars. They were formed by huge clouds of gas or clusters of millions of stars that collapsed on their own gravity when the universe was still much younger and denser.
They are called radicals.................