Answer:
Explanation:
The force to which the object of mass <em>m</em> is attracted to a star of mass <em>M</em> while being at a distance <em>r</em> is:
Where 
is the gravitational constant.
Also, Newton's 2nd Law tells us that this object subject by that force will experiment an acceleration given by <em>F=ma.</em>
We have then:
Which means:
The object departs from rest (
) and travels a distance <em>d</em>, under an acceleration <em>a</em>, we can calculate its final velocity with the formula 
, which for our case will be:
We assume <em>a</em> constant on the vecinity of the surface because d=0.025m is nothing compared with 
. With our values then we have:
Hydrogen does not contain any neutrons
The energy stored in the chemical bonds are released and the energy causes surrounding molecules to move faster. Chemical energy released as the coal is burned heats water and turns it to steam
B. 52. 40 protons plus 52 neutrons, adds up to 92.
