PhysicsCode 5054
The Earth
What this topic asks you to be able to do
- Know that: (a) the Earth, which is a planet, goes round the Sun once in about 365 days (b) the Earth's orbit around the Sun is an ellipse that is nearly a circle (c) the Earth spins once on its tilted axis in about 24 hours (d) the Moon takes about one month to go round the Earth (e) light from the Sun takes about 500s to get to the Earth
- Define average orbital speed using v = 2πr / T, in which r stands for the orbit's average radius and T for the orbital period; recall this equation and use it