#### Questions - **Answers** - Print (Questions) - Print (Answers) - PDF (Questions) - PDF (Answers)

## THE NEED FOR SPEED

1. | What is the speed of light in miles per second (to the nearest thousand)? 186,000 |

2. | How long, to the nearest tenth of a year, does it take light from the Sun to reach our nearest neighbouring star: Proxima Centauri? 4.2 years (discretion of plus or minus 0.1 years) |

3. | In miles per hour, how quickly does the Earth orbit the Sun? 70,000 mph |

4. | How long does it take from light from the Sun to travel to Earth? 8 minutes and 20 seconds (discretion plus or minus 20 seconds) |

5. | What is the current land speed record? 763.035 miles per hour (discretion plus or minus 5 mph) |

6. | What was the top speed in miles per hour of the first ever train? 4 miles per hour (discretion of plus or minus 1 mph) |

7. | What is the speed of sound at sea level? 761.02 mph (discretion plus or minus 5 mph) |

8. | At the equator, in miles per hour, what speed of the ground beneath your feet, as a result of the Earth's rotation? 1,000 mph |

9. | What speed in miles per hour must a rocket attain to escape Earth's gravity? 18,000 mph |

10. | On average who's hearts beat faster; men or women? Women |