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1. How do we know Mercury has a large iron core?

2. What could be the reasons that Venus has no magnetic field?

3. Why are there so few Moonquakes now?

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Answer-1: The average density of Mercury is 5440 kg/m3. This extremely high density is comparable to the density of the Earth, which is 5500 kg/m3. Since the size of Mercury is much less as compared to that of the Earth, the force of gravitational compression ...

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