## Conceptual Physics (12th Edition)

Find $\gamma$ at v = 0.50c. It is $\frac{1}{\sqrt{1-v^{2}/c^{2}}}$, or $\frac{1}{\sqrt{1-0.50^{2}}}$, which is 1.15. The factor $\gamma$ is the time dilation factor. Multiplying 1 hour by $\gamma$ gives 1.15 hours.