Our galaxy, the Milky Way, contains approximately 4.55×1011 stars with an average mass of 2.46×1030 kg each. I?
Our galaxy, the Milky Way, contains approximately 4.55×1011 stars with an average mass of 2.46×1030 kg each. If the Andromeda Galaxy, our nearest neighbor, contains roughly the same number of stars and is 2.27×1043 meters away, what is the gravitational force of attraction between the two galaxies?
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F = G(M/r)²
F = 6.67[-11](4.55[11] • 2.46[30]/2.27[43])²
F = 6.67[-11](4.93[-2])²
F = 6.67[-11] • 2.43[-3]
F = 1.62[-13] N
However, Andromeda is only 2.46[22] meters away.
That changes the result substantially.
But you didn't ask about that.
Before asking questions like this, it seems like you should learn to use exponential or scientific notation. Such calculations become really easy when expressed in proper notation. Don't they teach this in school anymore?
4.55 x 10^11
2.46 x 10^30
2.26 x10^43