The distance from the earth to the sun equals 1 au. Neptune is 30 au from the sun. How far is neptune from the.

When an object is heated it contracts. a. true b. false

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.