Models are used to save time, money, and lives true or false? i think i know the answer i just want to check: ); )

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

Explain why you think this diagram shows what happened to the carbon in the biodome.

Where do magnetic lines of force enter earth?