The answers to the gaps on statements about the planet's mercury and Neptune as regards distance from the sun are;
- Much greater
- Much farther from
- Weaker
- Much slower
1) From online research the masses of the planet's Neptune and mercury are;
Mass of Neptune = 1.024 × 10^(26) kg
Mass of Mercury = 0.33 × 10^(24) kg
It is clear that Neptune has a much greater mass than Mercury.
2) The distance of mercury from the sun is approximately 58 million km.
Whereas, distance of neptune from the sun is 4.5 billion km.
Thus, it is clear that Neptune is much farther from the sun than Mercury.
3) From keppler's laws of orbital motion, the closer a planet is to the Sun, the stronger the Sun's gravitational pull will be on it, and thus the faster the planet will move in it's orbit.
Whereas, the farther the planet is from the Sun, the weaker the Sun's gravitational pull will be on it, and the slower it will move in its orbit..
Now, Neptune has a greater distance from the sun than Mercury does and as such, the gravitational force exerted on neptune is weaker than that for mercury.
4) From 3 above, we have seen that larger distance indicates slower orbit while smaller distance indicates faster orbit.
Thus, Neptune has a much slower orbit than Mercury.
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