Answer:
How does a unitary government differ from a federal government? In a unitary government, the power is held by one central authority but in a federal government, the power is divided between national government or federal government and local governments or state governments.
Explanation:
Answer: D
Explanation: Newton’s Law. The more mass two objects have, the greater the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.
We need to assume that the orbits are circular; this is a very good approximation and do not hesitate to adopt it. We need then to consider the basic equation of circular motion that relates centripetal acceleration, angular velocity, mass, radius and force:

. We also have the basic equation of Newton, F=ma. By checking, we see that for each planet we have that a=v^2*r where v is the angular velocity. v=

where T is the orbital period, hence we have that a=

. Denote with the index 1 the Earth case and with 2 the Mars case. We have then that

. Substituting the known values in a calculator, we get the result: the centripetal acceleration of earth is 2.32 times greater than that of Mars.