Answer:
Our Moon doesn't have an atmosphere because it is too small and doesn't have a strong magnetic field. Any atmosphere it might have had would be stripped away by the solar wind that barrages the small world. In contrast, our planet has more mass to hold its atmosphere close, and a strong magnetic field to protect it.
The planet's mass in kilograms are 
b.
<u>Explanation:</u>
Given:
Mass of Neptune = 
milligrams
The mass in Kg = 1 milligram
Then the the planet's mass in kilograms will be:
The planet's mass in kilograms are .
Answer:
it think the 3 option but im not sure
Answer:
Feudalism declined as kings became richer and more powerful.
Explanation:
<span>Economies of Scale. This means as firms produce more their average costs fall. ...Brand Loyaly. Some firms have high degrees of brand loyalty. ...Geographical Barriers. Some Industries are specific to a certain area. ...<span>Patents.
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