The general theory of relativity depends on the fact that:
a. the mass m in Newton's law of gravitation always has the same value as the mass m in Newton's second law.
b. inertial mass is measured by how objects respond to forces.
c. gravitational mass is measured by comparing weights.
d. gravitational mass is always greater than inertial mass.
e. gravitational mass is always less than inertial mass.
Question 2
In this figure, light travels across a spaceship as the spaceship accelerates upward. As the light travels, its speed:
a. increases.
b. remains constant.
c. decreases.
d. first increases and then decreases.
e. first decreases and then increases.
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