Question
How long have magnets been used in navigation?
Group of answer choices
Since the 20th century
Since the 21st century
Since the 11th century
Since the 19th century
Group of answer choices
Since the 20th century
Since the 21st century
Since the 11th century
Since the 19th century
Answers
GPT-4o mini
Magnets have been used in navigation since the 11th century. The magnetic compass, which utilizes a magnetized needle to indicate direction, is believed to have been developed in China around that time. So, the correct answer is:
**Since the 11th century**.
**Since the 11th century**.