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# Dont have a clue how to do it watch

1. Seen from the moon, the earth has 3.6 times the angular diameter of the Sun. What is the ratio of densities of the Sun and the Earth?

No extra information given apart from a list of constants, no info like radius of planets etc
2. (Original post by rpotter)
Seen from the moon, the earth has 3.6 times the angular diameter of the Sun. What is the ratio of densities of the Sun and the Earth?

No extra information given apart from a list of constants, no info like radius of planets etc
Sam and I attempted this a few months back. This is on the trinity paper right?
I think you just approximate them, i.e. 6000km for radius of Earth.
Although you'd need to know earth-moon and sun-moon distances which I don't know exactly off the top of my head.
3. Seen from the moon, the earth has 3.6 times the angular diameter of the Sun. What is the ratio of densities of the Sun and the Earth?

did you mean distances ?
4. The Earth-Moon distance is about 400,000 km (4x105 km), and the Sun-Earth distance ≈ Sun-Moon distance is about 150,000,000km (1.5x108 km)
5. (Original post by the bear)
did you mean distances ?
nope question says densities
6. Ok, so I know this is a bit late, but I thought it would be useful for people to have a method for this question in the future.

Hope this helps guys.

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