If Satellite a Is in a 2:1 Resonance with Satellite

Multiple Choice

If satellite A is in a 2:1 resonance with satellite B, this means that:

A) satellite A is twice as large as satellite B.
B) satellite A moves twice as fast as satellite B.
C) satellite A completes one orbit for every two orbits of satellite B.
D) the orbit of satellite B takes twice as long to complete as that of satellite A.
E) satellite B spins on its axis one time for every two orbits of satellite A.