The Student Room Group

Dont have a clue how to do it

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
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. :redface:
Reply 2
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 ?
Reply 3
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)
Reply 4
the bear
did you mean distances ?


nope question says densities
Reply 5
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.

Q22 Pt1 png.png

Q22 Pt2 png.png

Hope this helps guys.

Quick Reply

Latest