The strong (Einstein) equivalence principle is more general than the weak one, but it is also limited in a number of ways. Which?

(multiple correct answer)

A. The laws of special relativity apply to free-falling frames, but those of electromagnetism do not

B. The free-falling frames are valid only locally, meaning in a small region of space as opposed to everywhere in space

C. Even though the physics is the same in free-falling and inertial frames, we can tell which one we're in by experiment

D. The gravitational field in which free-fall happens must be approximately constant in the region where the frame is valid

How do free-falling bodies move in General Relativity?

A. Along the longest path in curved space-time (shortest proper time)

B. Along the shortest path in curved space-time

C. There is no one answer because the space-time interval is much more complicated than in Special Relativity

D. Towards the nearest body that exerts gravity

Does General Relativity explain the strength of gravity?

A. No, the gravitational constant still appears in the field equations of GR

B. Yes, the strength of gravity is implicit in the logic of curved space

C. No, there is no gravity in GR (only curvature of space)

D. Yes, it predicts the measured value exactly without any fiddling with parameters