Two comets are 300 m apart. One comet has a mass of 80,000 kg. The force between them is 1.48 × 10–6 N. What is the mass of the other comet? 25,000 kg is the correct answer but I do not understand how.

Ithink the answer is a or d.

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

1.75 is the weight of one medium egg