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The surface gravity of Neptune is thought to be about 1.14 times the gravity on Earth, so 100 kg on Earth would weigh about 114 kg on Neptune--except that Neptune is a gas planet and has no solid surface on which the 100kg rock could be weighed.

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βˆ™ 13y ago
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βˆ™ 7mo ago

A 100kg rock would weigh approximately 1120 N on Neptune, due to Neptune's stronger gravitational pull compared to Earth.

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βˆ™ 16y ago

it would weigh 120

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Q: How much would a 100kg rock weigh on Neptune?
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