Four satellites are in orbit around the Earth. The heights of their four orbits are identical. The masses of the four satellites are given in the table. For which satellite is the gravitational pull of the Earth the strongest? Satellite A - 800 kg
Satellite B - 500 kg
Satellite C - 600 kg
Satellite D - 700 kg

yes

ya te ayud espera

answerspecific gravity;

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.