Answer:
D the lithospers and the athenosphere
Explanation:
They are the first crusts
The formula for gravitational potential energy is Ep= mgh. Lets convert 594 km into m: 594 x 1,000 = 594,000 m. So we do: Ep= (1,800kg)(9.8N/kg)(594,000m) = (17,640N)(594,000) = 10,478,160,000 J.
B) compound.
A compound is usually made up of different Elements, a compound is likely to have a melting point as well.