Author Question: Suppose that we suddenly discovered that all these years we'd been wrong about the distance from ... (Read 62 times)

mia · **on:** Jul 27, 2018

Suppose that we suddenly discovered that all these years we'd been wrong about the distance from Earth to the Sun, and it is actually 10 greater than we'd thought. How would that affect our estimate of the distance to the Andromeda Galaxy?

A) It would not have any effect on our estimate of the distance to the Andromeda Galaxy.
B) It would mean the distance to the Andromeda Galaxy is also 10 greater than we thought.
C) It would mean the distance to the Andromeda Galaxy is 10 less than we thought.
D) It would mean that all the objects we've assumed are standard candles really are not good standard candles, and therefore that we have no idea of the true distance to the Andromeda Galaxy.

Question 2

Changing the orbit of a spacecraft by firing thrusters is an example of

A) Newton's first law of motion.
B) Newton's second law of motion.
C) Newton's third law of motion.
D) the universal law of gravitation.
E) none of the above.