Here are the answers to this month’s five quiz questions. If in doubt, all should be able to be easily verified online.

Physical Science

1. What does a Geiger-Müller Counter measure?  Ionising Radiation
2. Which British-Italian engineer obtained a patent for radio in London in 1897?  Guglielmo Marconi
3. What man-made spacecraft is generally recognised as the first to leave the solar system?  Voyager 1
4. What is the speed of sound in a vacuum?  Zero; sound cannot exist in a vacuum
5. Who discovered that the earth revolves around the sun?  Nicolaus Copernicus

Answers were correct when questions were compiled in late 2023.