9. Newtonian mechanics are valid a) in all frames of reference b) in relativistic frames of reference c) in inertia frames of reference d) on Earth only e) both b and c 10. Two spaceships are heading toward each other at a mutal speed of 0.999c. Both ships shine a laser beam at one another. How will each ship see the other light? d) Neither will see the light travelling at 2c. e) none of the above a) Both ships will see the other light b) Both ships will see the light travelling at c c) The one ship will see the light travelling at c, and the other will see it travelling at 2c

In physics, a frame of reference is a coordinate system used to specify either the position or the orientation or velocity of a body. The origin of the coordinate acts as a reference point for measuring the position or relative motion of a body. The coor…